Calibration Gas Guide

What Calibration Gas Does My Detector Need?

Find your detector below — or search by manufacturer, model, unit part number, sensor, or sensor part number. Every unit shows the standard calibration gas it takes, with our part numbers and prices, and every other sensor that fits it with the gas that sensor calibrates to. Values are taken from each manufacturer's own published documentation; where a manufacturer publishes no value, the page says so instead of guessing.

No match — check the part number, or call us at (865) 900-8844 and we'll match the gas to your instrument.

RKI Instruments

RKI Instruments CO-04

Unit part numbers: 73-0065

Sensor	Calibrates to
CO	Carbon monoxide 50 ppm

Source: brand-standard (RKI mix 116)

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
CO (0-2,000 ppm)	ESR-A13P-CO · ESR-A1CP-CO-H	Carbon monoxide 50 ppm	34L · 34-10-0050 · $74

RKI Instruments CO-04C

Unit part numbers: 73-0067

Sensor	Calibrates to
CO	Carbon monoxide 50 ppm

Source: brand-standard (RKI mix 116)

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
CO (0-2,000 ppm)	ESR-A13P-CO · ESR-A1CP-CO-H	Carbon monoxide 50 ppm	34L · 34-10-0050 · $74

RKI Instruments CX-04

Unit part numbers: 73-0069

Sensor	Calibrates to
CO	Carbon monoxide 50 ppm
O2	Oxygen 20.9% (zero air) — span

Source: brand-standard (RKI mix 116) · universal

RKI Instruments GasWatch 3

Unit part numbers: 72-0012, 72-0012-01, 73-0022, 73-0022-01, 73-0023, 73-0023-01 · +4 more (search any part number)

Sensor	Calibrates to
CO	Carbon monoxide 50 ppm
H2S	Hydrogen sulfide 25 ppm
O2	Oxygen 20.9% (zero air) — span
CO/O2	No manufacturer default published — match the concentration set in the instrument.

Source: brand-standard (RKI mix 116) · universal · unresolved

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
CO (0-2,000 ppm)	ESR-A13P-CO · ESR-A1CP-CO-H	Carbon monoxide 50 ppm	34L · 34-10-0050 · $74
CO/H2S (0-2,000 / 0-200 ppm)	ESR-A1DP-COHS	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
CO/O2 (0-300 ppm / 0-25% Volume)	ESR-X1DP-CX	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
H2S (0-200 ppm)	ESR-A13I-H2S	Hydrogen sulfide 25 ppm	11L · FX11-111-025 · $55
O2 (0-25% Volume)	OS-BM2	Oxygen 20.9% (zero air) — span; Nitrogen 99.999% UHP — zero Not stocked as a standalone cylinder — ask us.

RKI Instruments GP-03

Unit part numbers: 72-0037, 72-0037-05, 72-0037-50

Sensor	Calibrates to
LEL	Methane 50% LEL

Source: brand-standard (RKI mix 116)

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
LEL (0-100% LEL)	NC-6264A	Methane 50% LEL	34L · 34-23-8600 · $70

RKI Instruments GX-3R

Unit part numbers: 72-RA-C, 72-RA-D, 72-RA-E, 72-RA-F, 72-RA-G

Sensor	Calibrates to
LEL	Methane 50% LEL
O2	Oxygen 12%
CO	Carbon monoxide 50 ppm
H2S	Hydrogen sulfide 25 ppm

Source: GX-3R Operator's Manual 71-0477 Rev F, rkiinstruments.com (factory Cylinder A defaults)

Standard calibration gas for this unit

4-Gas Calibration Gas – RKI Equivalent – H₂S 25 / CO 50 / CH₄ 50% LEL / O₂ 12%

34L · FX34-150-1500 · $195 60L · FX60-150-1500 · $245 120L · FX120-150-1500 · $295 11L · FX11-155-1500 · $90 44L · FX44-155-1500 · $210 66L · FX66-155-1500 · $275

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
CO (0-2,000 ppm)	ESR-A13P-CO · ESR-A1CP-CO-H	Carbon monoxide 50 ppm	34L · 34-10-0050 · $74
CO/H2S (0-2,000 / 0-200 ppm)	ESR-A1DP-COHS	Carbon monoxide 50 ppm + Hydrogen sulfide 25 ppm (via standard mix)	34L · FX34-150-1500 · $195
H2S (0-200 ppm)	ESR-A13I-H2S	Hydrogen sulfide 25 ppm	11L · FX11-111-025 · $55
LEL (0-100% LEL)	NCR-6309	Methane 50% LEL	34L · 34-23-8600 · $70
O2 (0-25% Volume)	ESR-X13P-OXY	Oxygen 20.9% (zero air) — span; Nitrogen 99.999% UHP — zero Not stocked as a standalone cylinder — ask us.

RKI Instruments GX-3R Pro

Unit part numbers: 72-PAX-B, 72-PAX-C, 72-PAX-D, 72-PAX-F, 72-PAA-B, 72-PAA-C · +26 more (search any part number)

Sensor	Calibrates to
LEL	Methane 50% LEL
O2	Oxygen 12%
CO	Carbon monoxide 50 ppm
H2S	Hydrogen sulfide 25 ppm

Source: GX-3R Pro Operator's Manual 71-0478 Rev H, rkiinstruments.com (factory Cylinder A defaults)

Standard calibration gas for this unit

4-Gas Calibration Gas – RKI Equivalent – H₂S 25 / CO 50 / CH₄ 50% LEL / O₂ 12%

34L · FX34-150-1500 · $195 60L · FX60-150-1500 · $245 120L · FX120-150-1500 · $295 11L · FX11-155-1500 · $90 44L · FX44-155-1500 · $210 66L · FX66-155-1500 · $275

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
CO (0-2,000 ppm)	ESR-A13P-CO · ESR-A1CP-CO-H	Carbon monoxide 50 ppm	34L · 34-10-0050 · $74
CO/H2S (0-2,000 / 0-200 ppm)	ESR-A1DP-COHS	Carbon monoxide 50 ppm + Hydrogen sulfide 25 ppm (via standard mix)	34L · FX34-150-1500 · $195
CO2 (0-10% Volume)	IRR-0409	Match the concentration stored in the device — ask us and we'll match a cylinder to it. RKI publishes no default span for this sensor (the manual gives calibration-concentration ranges only) — match the concentration set in the instrument. CPS stocked gas is linked as an option, not as an RKI default.
CO2 (0-10,000 ppm)	IRR-0433	Carbon dioxide 5,000 ppm RKI publishes no default span for this sensor (the manual gives calibration-concentration ranges only) — match the concentration set in the instrument. CPS stocked gas is linked as an option, not as an RKI default.	34L · 34-08-3300 · $70
H2S (0-200 ppm)	ESR-A13I-H2S	Hydrogen sulfide 25 ppm	11L · FX11-111-025 · $55
HCN (0-30 ppm)	ESR-A13D-HCN	Hydrogen cyanide 10 ppm RKI publishes no default span for this sensor (the manual gives calibration-concentration ranges only) — match the concentration set in the instrument. CPS stocked gas is linked as an option, not as an RKI default.	34L · FX34-108-010 · $254
LEL (0-100% LEL)	NCR-6309	Methane 50% LEL	34L · 34-23-8600 · $70
NH3 (0-400 ppm)	ESR-B134-NH3	Ammonia 25 ppm RKI publishes no default span for this sensor (the manual gives calibration-concentration ranges only) — match the concentration set in the instrument. CPS stocked gas is linked as an option, not as an RKI default.	34L · FX34-106-025 · $239
NO2 (0-20 ppm)	ESR-A13D-NO2	Nitrogen dioxide 10 ppm RKI publishes no default span for this sensor (the manual gives calibration-concentration ranges only) — match the concentration set in the instrument. CPS stocked gas is linked as an option, not as an RKI default.	34L · FX34-123-010 · $239
O2 (0-25% Volume)	ESR-X13P-OXY	Oxygen 20.9% (zero air) — span; Nitrogen 99.999% UHP — zero Not stocked as a standalone cylinder — ask us.
PH3 (0-20 ppm)	ESR-A13D-PH3	Phosphine 5 ppm RKI publishes no default span for this sensor (the manual gives calibration-concentration ranges only) — match the concentration set in the instrument. CPS stocked gas is linked as an option, not as an RKI default.	34L · FX34-124-05 · $244
SO2 (0-100 ppm)	ESR-A13D-SO2	Sulfur dioxide 10 ppm RKI publishes no default span for this sensor (the manual gives calibration-concentration ranges only) — match the concentration set in the instrument. CPS stocked gas is linked as an option, not as an RKI default.	34L · FX34-126-010 · $163

RKI Instruments GX-6000

Unit part numbers: 72-6AXX-C, 72-6AXC-C, 72-6AXD-C, 72-6AXE-C, 72-6AXF-C, 72-6AXI-C · +30 more (search any part number)

Sensor	Calibrates to
LEL	Methane 50% LEL
O2	Oxygen 12%
CO	Carbon monoxide 50 ppm
H2S	Hydrogen sulfide 25 ppm
PID	Isobutylene 100 ppm

Source: GX-6000 Operator's Manual 71-0362 Rev W, rkiinstruments.com

Standard calibration gas for this unit

4-Gas Calibration Gas – RKI Equivalent – H₂S 25 / CO 50 / CH₄ 50% LEL / O₂ 12%

34L · FX34-150-1500 · $195 60L · FX60-150-1500 · $245 120L · FX120-150-1500 · $295 11L · FX11-155-1500 · $90 44L · FX44-155-1500 · $210 66L · FX66-155-1500 · $275

Also standard for this unit (5-gas configuration)

5-Gas Calibration Gas – RKI Equivalent – H₂S 25 / CO 50 / CH₄ 50% LEL / O₂ 12% / Isobutylene 100 ppm

34L · FX34-155-1500 · $184 60L · FX60-155-1500 · $230 120L · FX120-155-1500 · $287

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
CO (0-500 ppm)	ES-1821	Carbon monoxide 50 ppm	34L · 34-10-0050 · $74
CO2 (0-10% Volume)	DES-3311-1 · DES-3311-1-01	Match the concentration stored in the device — ask us and we'll match a cylinder to it. RKI publishes no default span for this sensor (the manual gives calibration-concentration ranges only) — match the concentration set in the instrument. CPS stocked gas is linked as an option, not as an RKI default.
CO2 (0-10,000 ppm)	DES-3311-4 · DES-3311-4-01	Carbon dioxide 5,000 ppm RKI publishes no default span for this sensor (the manual gives calibration-concentration ranges only) — match the concentration set in the instrument. CPS stocked gas is linked as an option, not as an RKI default.	34L · 34-08-3300 · $70
Cl2 (0-10 ppm)	ESS-B335-CL2	Chlorine 10 ppm	34L · FX34-130-10 · $239
H2S (0-100 ppm)	ES-1827i	Hydrogen sulfide 25 ppm	11L · FX11-111-025 · $55
HC (0-100% LEL / 0-30% Volume)	DES-3311-2	Methane 50% LEL	34L · 34-23-8600 · $70
HCN (0-15 ppm)	ESS-03DH-HCN	Hydrogen cyanide 10 ppm RKI publishes no default span for this sensor (the manual gives calibration-concentration ranges only) — match the concentration set in the instrument. CPS stocked gas is linked as an option, not as an RKI default.	34L · FX34-108-010 · $254
LEL (0-100% LEL)	NC-6264A · NC-6264AZX	Methane 50% LEL	34L · 34-23-8600 · $70
LEL (0-100% LEL / 0-100% Volume)	DES-3311-3	Methane 50% LEL	34L · 34-23-8600 · $70
NH3 (0-400 ppm)	ESS-B332-NH3	Ammonia 25 ppm RKI publishes no default span for this sensor (the manual gives calibration-concentration ranges only) — match the concentration set in the instrument. CPS stocked gas is linked as an option, not as an RKI default.	34L · FX34-106-025 · $239
NO2 (0-20 ppm)	ESS-03DH-NO2	Nitrogen dioxide 10 ppm RKI publishes no default span for this sensor (the manual gives calibration-concentration ranges only) — match the concentration set in the instrument. CPS stocked gas is linked as an option, not as an RKI default.	34L · FX34-123-010 · $239
O2 (0-25% Volume)	OS-BM2	Oxygen 20.9% (zero air) — span; Nitrogen 99.999% UHP — zero Not stocked as a standalone cylinder — ask us.
PH3 (0-20 ppm)	ESS-03DH-PH3	Phosphine 5 ppm RKI publishes no default span for this sensor (the manual gives calibration-concentration ranges only) — match the concentration set in the instrument. CPS stocked gas is linked as an option, not as an RKI default.	34L · FX34-124-05 · $244
PID (0-1,000 ppm)	PID-004	Isobutylene 100 ppm	34L · 34-21-0100 · $74
PID (0-100 ppm)	PID-003L	Isobutylene 100 ppm	34L · 34-21-0100 · $74
PID (0-4,000 ppm)	PID-002LA	Isobutylene 100 ppm	34L · 34-21-0100 · $74
PID (0-40 ppm)	PID-001LA	Isobutylene 100 ppm	34L · 34-21-0100 · $74
SO2 (0-100 ppm)	ESS-03DH-SO2	Sulfur dioxide 10 ppm RKI publishes no default span for this sensor (the manual gives calibration-concentration ranges only) — match the concentration set in the instrument. CPS stocked gas is linked as an option, not as an RKI default.	34L · FX34-126-010 · $163

RKI Instruments GX-6100

Unit part numbers: 72-61AXXX-B, 72-61AXXX-C, 72-61AXXT-B, 72-61AXXT-C, 72-61AXEX-B, 72-61AXEX-C · +282 more (search any part number)

Sensor	Calibrates to
LEL	Methane 50% LEL
O2	Oxygen 12%
CO	Carbon monoxide 50 ppm
H2S	Hydrogen sulfide 25 ppm
PID	Isobutylene 100 ppm

Source: GX-6000 Operator's Manual 71-0362 Rev W, rkiinstruments.com

Standard calibration gas for this unit

4-Gas Calibration Gas – RKI Equivalent – H₂S 25 / CO 50 / CH₄ 50% LEL / O₂ 12%

34L · FX34-150-1500 · $195 60L · FX60-150-1500 · $245 120L · FX120-150-1500 · $295 11L · FX11-155-1500 · $90 44L · FX44-155-1500 · $210 66L · FX66-155-1500 · $275

Also standard for this unit (5-gas configuration)

5-Gas Calibration Gas – RKI Equivalent – H₂S 25 / CO 50 / CH₄ 50% LEL / O₂ 12% / Isobutylene 100 ppm

34L · FX34-155-1500 · $184 60L · FX60-155-1500 · $230 120L · FX120-155-1500 · $287

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
CO (0-2,000 ppm)	ESR-A13P-CO · ESR-A1CP-CO-H	Carbon monoxide 50 ppm	34L · 34-10-0050 · $74
CO2 (0-10% Volume)	DES-3311-1 · DES-3311-1-01	Match the concentration stored in the device — ask us and we'll match a cylinder to it. RKI publishes no default span for this sensor (the manual gives calibration-concentration ranges only) — match the concentration set in the instrument. CPS stocked gas is linked as an option, not as an RKI default.
CO2 (0-10,000 ppm)	DES-3311-4 · DES-3311-4-01	Carbon dioxide 5,000 ppm RKI publishes no default span for this sensor (the manual gives calibration-concentration ranges only) — match the concentration set in the instrument. CPS stocked gas is linked as an option, not as an RKI default.	34L · 34-08-3300 · $70
Cl2 (0-10 ppm)	ESS-B335-CL2	Chlorine 10 ppm	34L · FX34-130-10 · $239
H2S (0-200 ppm)	ESR-A13I-H2S	Hydrogen sulfide 25 ppm	11L · FX11-111-025 · $55
HC (0-100% LEL / 0-30% Volume)	DES-3311-2	Methane 50% LEL	34L · 34-23-8600 · $70
HCN (0-15 ppm)	ESS-03DH-HCN	Hydrogen cyanide 10 ppm RKI publishes no default span for this sensor (the manual gives calibration-concentration ranges only) — match the concentration set in the instrument. CPS stocked gas is linked as an option, not as an RKI default.	34L · FX34-108-010 · $254
LEL (0-100% LEL / 0-100% Volume)	DES-3311-3	Methane 50% LEL	34L · 34-23-8600 · $70
LEL (0-100% Volume)	TE-7561	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
NH3 (0-400 ppm)	ESS-B332-NH3	Ammonia 25 ppm RKI publishes no default span for this sensor (the manual gives calibration-concentration ranges only) — match the concentration set in the instrument. CPS stocked gas is linked as an option, not as an RKI default.	34L · FX34-106-025 · $239
NO2 (0-20 ppm)	ESS-03DH-NO2	Nitrogen dioxide 10 ppm RKI publishes no default span for this sensor (the manual gives calibration-concentration ranges only) — match the concentration set in the instrument. CPS stocked gas is linked as an option, not as an RKI default.	34L · FX34-123-010 · $239
O2 (0-25% Volume)	ESR-X13P-OXY	Oxygen 20.9% (zero air) — span; Nitrogen 99.999% UHP — zero Not stocked as a standalone cylinder — ask us.
PH3 (0-20 ppm)	ESS-03DH-PH3	Phosphine 5 ppm RKI publishes no default span for this sensor (the manual gives calibration-concentration ranges only) — match the concentration set in the instrument. CPS stocked gas is linked as an option, not as an RKI default.	34L · FX34-124-05 · $244
PID (0-1,000 ppm)	PID-004	Isobutylene 100 ppm	34L · 34-21-0100 · $74
PID (0-100 ppm)	PID-003L	Isobutylene 100 ppm	34L · 34-21-0100 · $74
PID (0-4,000 ppm)	PID-002LA	Isobutylene 100 ppm	34L · 34-21-0100 · $74
PID (0-40 ppm)	PID-001LA	Isobutylene 100 ppm	34L · 34-21-0100 · $74
SO2 (0-100 ppm)	ESS-03DH-SO2	Sulfur dioxide 10 ppm RKI publishes no default span for this sensor (the manual gives calibration-concentration ranges only) — match the concentration set in the instrument. CPS stocked gas is linked as an option, not as an RKI default.	34L · FX34-126-010 · $163

RKI Instruments GX-Force

Unit part numbers: 72-FA-A-B, 72-FA-A-A20, 72-FA-A-A15, 72-FA-A-A10, 72-FA-A-A5, 72-FA-B-B · +9 more (search any part number)

Sensor	Calibrates to
LEL	Methane 50% LEL
O2	Oxygen 12%
CO	Carbon monoxide 50 ppm
H2S	Hydrogen sulfide 25 ppm

Standard calibration gas for this unit

4-Gas Calibration Gas – RKI Equivalent – H₂S 25 / CO 50 / CH₄ 50% LEL / O₂ 12%

34L · FX34-150-1500 · $195 60L · FX60-150-1500 · $245 120L · FX120-150-1500 · $295 11L · FX11-155-1500 · $90 44L · FX44-155-1500 · $210 66L · FX66-155-1500 · $275

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
CO (0-2,000 ppm)	ESR-A13P-CO · ESR-A1CP-CO-H	Carbon monoxide 50 ppm	34L · 34-10-0050 · $74
CO/H2S (0-2,000 / 0-200 ppm)	ESR-A1DP-COHS	Carbon monoxide 50 ppm + Hydrogen sulfide 25 ppm (via standard mix)	34L · FX34-150-1500 · $195
H2S (0-200 ppm)	ESR-A13I-H2S	Hydrogen sulfide 25 ppm	11L · FX11-111-025 · $55
LEL (0-100% LEL)	NCR-6309	Methane 50% LEL	34L · 34-23-8600 · $70
O2 (0-25% Volume)	ESR-X13P-OXY	Oxygen 20.9% (zero air) — span; Nitrogen 99.999% UHP — zero Not stocked as a standalone cylinder — ask us.

RKI Instruments HS-04

Unit part numbers: 73-0063

Sensor	Calibrates to
H2S	Hydrogen sulfide 25 ppm

Source: brand-standard (RKI mix 116)

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
H2S (0-200 ppm)	ESR-A13I-H2S	Hydrogen sulfide 25 ppm	11L · FX11-111-025 · $55

RKI Instruments OX-04

Unit part numbers: 72-0018

Sensor	Calibrates to
O2	Oxygen 20.9% (zero air) — span

Source: universal

RKI Instruments SC-04 (Cl2)

Unit part numbers: 73-0075

Sensor	Calibrates to
Cl2	Chlorine 10 ppm

Source: standard-target

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
Cl2 (0-20 ppm)	ESR-B136-CL2	Chlorine 10 ppm	34L · FX34-130-10 · $239
HCN (0-30 ppm)	ESR-A13D-HCN	Hydrogen cyanide 10 ppm	34L · FX34-108-010 · $254
NH3 (0-400 ppm)	ESR-B134-NH3	Ammonia 25 ppm	34L · FX34-106-025 · $239
NO2 (0-20 ppm)	ESR-A13D-NO2	Nitrogen dioxide 10 ppm	34L · FX34-123-010 · $239
PH3 (0-20 ppm)	ESR-A13D-PH3	Phosphine 5 ppm	34L · FX34-124-05 · $244
SO2 (0-100 ppm)	ESR-A13D-SO2	Sulfur dioxide 10 ppm	34L · FX34-126-010 · $163

RKI Instruments SC-04 (HCN)

Unit part numbers: 73-0071

Sensor	Calibrates to
HCN	Hydrogen cyanide 10 ppm

Source: standard-target

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
Cl2 (0-20 ppm)	ESR-B136-CL2	Chlorine 10 ppm	34L · FX34-130-10 · $239
HCN (0-30 ppm)	ESR-A13D-HCN	Hydrogen cyanide 10 ppm	34L · FX34-108-010 · $254
NH3 (0-400 ppm)	ESR-B134-NH3	Ammonia 25 ppm	34L · FX34-106-025 · $239
NO2 (0-20 ppm)	ESR-A13D-NO2	Nitrogen dioxide 10 ppm	34L · FX34-123-010 · $239
PH3 (0-20 ppm)	ESR-A13D-PH3	Phosphine 5 ppm	34L · FX34-124-05 · $244
SO2 (0-100 ppm)	ESR-A13D-SO2	Sulfur dioxide 10 ppm	34L · FX34-126-010 · $163

RKI Instruments SC-04 (NH3)

Unit part numbers: 73-0077

Sensor	Calibrates to
NH3	Ammonia 25 ppm

Source: standard-target

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
Cl2 (0-20 ppm)	ESR-B136-CL2	Chlorine 10 ppm	34L · FX34-130-10 · $239
HCN (0-30 ppm)	ESR-A13D-HCN	Hydrogen cyanide 10 ppm	34L · FX34-108-010 · $254
NH3 (0-400 ppm)	ESR-B134-NH3	Ammonia 25 ppm	34L · FX34-106-025 · $239
NO2 (0-20 ppm)	ESR-A13D-NO2	Nitrogen dioxide 10 ppm	34L · FX34-123-010 · $239
PH3 (0-20 ppm)	ESR-A13D-PH3	Phosphine 5 ppm	34L · FX34-124-05 · $244
SO2 (0-100 ppm)	ESR-A13D-SO2	Sulfur dioxide 10 ppm	34L · FX34-126-010 · $163

RKI Instruments SC-04 (NO2)

Unit part numbers: 73-0073

Sensor	Calibrates to
NO2	Nitrogen dioxide 10 ppm

Source: standard-target

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
Cl2 (0-20 ppm)	ESR-B136-CL2	Chlorine 10 ppm	34L · FX34-130-10 · $239
HCN (0-30 ppm)	ESR-A13D-HCN	Hydrogen cyanide 10 ppm	34L · FX34-108-010 · $254
NH3 (0-400 ppm)	ESR-B134-NH3	Ammonia 25 ppm	34L · FX34-106-025 · $239
NO2 (0-20 ppm)	ESR-A13D-NO2	Nitrogen dioxide 10 ppm	34L · FX34-123-010 · $239
PH3 (0-20 ppm)	ESR-A13D-PH3	Phosphine 5 ppm	34L · FX34-124-05 · $244
SO2 (0-100 ppm)	ESR-A13D-SO2	Sulfur dioxide 10 ppm	34L · FX34-126-010 · $163

RKI Instruments SC-04 (PH3)

Unit part numbers: 73-0079

Sensor	Calibrates to
PH3	Phosphine 5 ppm

Source: standard-target

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
Cl2 (0-20 ppm)	ESR-B136-CL2	Chlorine 10 ppm	34L · FX34-130-10 · $239
HCN (0-30 ppm)	ESR-A13D-HCN	Hydrogen cyanide 10 ppm	34L · FX34-108-010 · $254
NH3 (0-400 ppm)	ESR-B134-NH3	Ammonia 25 ppm	34L · FX34-106-025 · $239
NO2 (0-20 ppm)	ESR-A13D-NO2	Nitrogen dioxide 10 ppm	34L · FX34-123-010 · $239
PH3 (0-20 ppm)	ESR-A13D-PH3	Phosphine 5 ppm	34L · FX34-124-05 · $244
SO2 (0-100 ppm)	ESR-A13D-SO2	Sulfur dioxide 10 ppm	34L · FX34-126-010 · $163

RKI Instruments SC-04 (SO2)

Unit part numbers: 73-0081

Sensor	Calibrates to
SO2	Sulfur dioxide 10 ppm

Source: standard-target

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
Cl2 (0-20 ppm)	ESR-B136-CL2	Chlorine 10 ppm	34L · FX34-130-10 · $239
HCN (0-30 ppm)	ESR-A13D-HCN	Hydrogen cyanide 10 ppm	34L · FX34-108-010 · $254
NH3 (0-400 ppm)	ESR-B134-NH3	Ammonia 25 ppm	34L · FX34-106-025 · $239
NO2 (0-20 ppm)	ESR-A13D-NO2	Nitrogen dioxide 10 ppm	34L · FX34-123-010 · $239
PH3 (0-20 ppm)	ESR-A13D-PH3	Phosphine 5 ppm	34L · FX34-124-05 · $244
SO2 (0-100 ppm)	ESR-A13D-SO2	Sulfur dioxide 10 ppm	34L · FX34-126-010 · $163

RKI Instruments SC-8000

Unit part numbers: 400-AL-CA, 400-AL-SU, 400-AL-NI, 400-AL-PH, 400-AL-SI, 400-AL-AR · +44 more (search any part number)

Gas configurations for this unit

COCl2H2HCNHClHFNH3NO2O3PH3SO2

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
AsH3 (0-0.2 ppm)	ESM-23AHS-ASH3	Arsine Not stocked as a standalone cylinder — ask us.
B2H6 (0-0.3 ppm)	ESM-23AY-B2H6	Diborane Not stocked as a standalone cylinder — ask us.
CO (0-150 ppm)	ESM-23-CO	Carbon monoxide 50 ppm	34L · 34-10-0050 · $74
Cl2 (0-3 ppm)	ESM-K233-CL2	Chlorine 10 ppm	34L · FX34-130-10 · $239
F2 (0-3 ppm)	ESM-K233-F2	Fluorine Not stocked as a standalone cylinder — ask us.
GeH4 (0-0.8 ppm)	ESM-23DH-GEH4	Germane Not stocked as a standalone cylinder — ask us.
H2O2 (0-0.500 ppm)	ESM-23DH-H2O2-1	Hydrogen peroxide Not stocked as a standalone cylinder — ask us.
H2O2 (0-3 ppm)	ESM-23DH-H2O2	Hydrogen peroxide Not stocked as a standalone cylinder — ask us.
HCN (0-15 ppm)	ESM-23DH-HCN	Hydrogen cyanide 10 ppm	34L · FX34-108-010 · $254
HF (0-9 ppm)	ESM-K233-HF	Hydrogen fluoride Not stocked as a standalone cylinder — ask us.
NO2 (0-15 ppm)	ESM-23AH-NO2	Nitrogen dioxide 10 ppm	34L · FX34-123-010 · $239
O3 (0-1.0 ppm)	ESM-K239C-O3	Ozone Not stocked as a standalone cylinder — ask us.
PH3 (0-1 ppm)	ESM-23AH-PH3	Phosphine 5 ppm	34L · FX34-124-05 · $244
SO2 (0-30 ppm)	ESM-23E-SO2	Sulfur dioxide 10 ppm	34L · FX34-126-010 · $163
SO2 (0-6 ppm)	ESM-238-SO2	Sulfur dioxide 10 ppm	34L · FX34-126-010 · $163
Si2H6 (0-15 ppm)	ESM-23DH-SI2H6	Disilane Not stocked as a standalone cylinder — ask us.

RKI Instruments 35-3001 fixed detector

Unit part numbers: 35-3001-11-0202, 35-3001-07-02, 35-3001-07-03, 35-3001-08, 35-3001-08-01, 35-3001-08-02 · +50 more (search any part number)

Gas configurations for this unit

LEL

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
H2 (0 - 100 % LEL)	61-0155RK	Hydrogen 50% LEL	34L · 34-19-7500 · $70
LEL (0 - 100% vol)	61-5041RK-CH4	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
LEL (0-100% LEL)	NC-6245	Methane 50% LEL	34L · 34-23-8600 · $70

RKI Instruments EC-600 fixed detector

Unit part numbers: 73-1202, 73-1202-03, 73-1202-05, 73-1202-10, 73-1202-20, 73-1203 · +9 more (search any part number)

Sensor	Calibrates to
CO	Carbon monoxide 50 ppm

Source: brand-standard (RKI mix 116)

RKI Instruments GD-70D (Catalytic / Oxygen / TEOS) fixed detector

Unit part numbers: GD-70D-XXX, GD-70DEA-NCU-6211, GD-70DEA-SSU-1925-A, GD-70DEA-NCU-6213-CH4, GD-70DEA-ESU-X23-OXY, GD-70DEA-SSU-1927

Gas configurations for this unit

CH4LELO2

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
AsH3 (0-0.20 ppm)	ESU-C23F-ASH3	Arsine Not stocked as a standalone cylinder — ask us.
AsH3 (0-50 ppb)	ESU-C23F-S-ASH3	Arsine Not stocked as a standalone cylinder — ask us.
B2H6 (0-0.30 ppm)	ESU-23AY-B2H6	Diborane Not stocked as a standalone cylinder — ask us.
CO (0-150 ppm)	ESU-23-CO-150	Carbon monoxide 50 ppm	34L · 34-10-0050 · $74
Cl2 (0-3.0 ppm)	ESU-K235-CL2-3	Chlorine 10 ppm	34L · FX34-130-10 · $239
Cl2 (0-3.00 PPM)	ESU-K235L-CL2-3	Chlorine 10 ppm	34L · FX34-130-10 · $239
ClF3 (0-0.60 ppm)	ESU-K233CS-CLFA	Chlorine trifluoride Not stocked as a standalone cylinder — ask us.
F2 (0-3.0 ppm)	ESU-K235-F2-3	Fluorine Not stocked as a standalone cylinder — ask us.
GeH4 (0-0.80 ppm)	ESU-23DH-GEH4	Germane Not stocked as a standalone cylinder — ask us.
H2 (0 - 500 ppm)	SGU-8521-H2-500 · SGU-8541-H2-500	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
H2 (0-1000 ppm)	SGU-8521-H2-1K · SGU-8541-H2-1K	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
H2 (0-2.0% vol)	SGU-8511-H2-20K	Hydrogen 50% LEL	34L · 34-19-7500 · $70
H2 (0-2000 ppm)	SGU-8541-H2-2K	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
H2 (0-4000 ppm)	SGU-8541-H2-4K	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
H2S (0-30 ppm)	ESU-237IF-H2S30	Hydrogen sulfide 25 ppm	11L · FX11-111-025 · $55
HBr (0-6.00 ppm)	ESU-23E-HBR-06	Hydrogen bromide Not stocked as a standalone cylinder — ask us.
HBr (0-9.00 ppm)	ESU-23E-HBR-09	Hydrogen bromide Not stocked as a standalone cylinder — ask us.
HCN (0-15 ppm)	ESU-23DH-HCN	Hydrogen cyanide 10 ppm	34L · FX34-108-010 · $254
HCl (0-15 ppm)	ESU-23E-HCL-15	Hydrogen chloride Not stocked as a standalone cylinder — ask us.
HCl (0-6.00 ppm)	ESU-23E-HCL-06	Hydrogen chloride Not stocked as a standalone cylinder — ask us.
HF (0-9.0 ppm)	ESU-K233-HF-09	Hydrogen fluoride Not stocked as a standalone cylinder — ask us.
LEL (0 - 5000 ppm)	SGU-8511-CH4-5K	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
LEL (0-2.0% vol)	SGU-8511-CH4-20	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
LEL (0-2000 ppm)	SGU-8581-CH4-2K	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
NH3 (0-75 ppm)	ESU-23R-NH3	Ammonia 25 ppm	34L · FX34-106-025 · $239
NO (0-100 ppm)	ESU-23A-NO	Nitric oxide Not stocked as a standalone cylinder — ask us.
NO2 (0-15 ppm)	ESU-23AR-NO2-15	Nitrogen dioxide 10 ppm	34L · FX34-123-010 · $239
NO2 (0-9 ppm)	ESU-23AR-NO2-09	Nitrogen dioxide 10 ppm	34L · FX34-123-010 · $239
O3 (0-0.60 ppm)	ESU-K239C-S-O3	Ozone Not stocked as a standalone cylinder — ask us.
PH3 (0-1.0 ppm)	ESU-23AH-PH3	Phosphine 5 ppm	34L · FX34-124-05 · $244
Si2H6 (0-15 ppm)	ESU-23DH-SI2H6	Disilane Not stocked as a standalone cylinder — ask us.

RKI Instruments GD-70D (MOS Gases) fixed detector

Unit part numbers: GD-70DEA-XXX., GD-70DEA-SGU-8521-ACE-1K, GD-70DEA-SGU-8521-CH3CN, GD-70DEA-SGU-8521-C2H2-2, GD-70DEA-SGU-8562-COS-2K, GD-70DEA-SGU-8513-DCE-6 · +22 more (search any part number)

Gas configurations for this unit

CH4COSH2

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
AsH3 (0-0.20 ppm)	ESU-C23F-ASH3	Arsine Not stocked as a standalone cylinder — ask us.
AsH3 (0-50 ppb)	ESU-C23F-S-ASH3	Arsine Not stocked as a standalone cylinder — ask us.
B2H6 (0-0.30 ppm)	ESU-23AY-B2H6	Diborane Not stocked as a standalone cylinder — ask us.
CO (0-150 ppm)	ESU-23-CO-150	Carbon monoxide 50 ppm	34L · 34-10-0050 · $74
Cl2 (0-3.0 ppm)	ESU-K235-CL2-3	Chlorine 10 ppm	34L · FX34-130-10 · $239
Cl2 (0-3.00 PPM)	ESU-K235L-CL2-3	Chlorine 10 ppm	34L · FX34-130-10 · $239
ClF3 (0-0.60 ppm)	ESU-K233CS-CLFA	Chlorine trifluoride Not stocked as a standalone cylinder — ask us.
F2 (0-3.0 ppm)	ESU-K235-F2-3	Fluorine Not stocked as a standalone cylinder — ask us.
GeH4 (0-0.80 ppm)	ESU-23DH-GEH4	Germane Not stocked as a standalone cylinder — ask us.
H2 (0 - 500 ppm)	SGU-8521-H2-500 · SGU-8541-H2-500	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
H2 (0-1000 ppm)	SGU-8521-H2-1K · SGU-8541-H2-1K	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
H2 (0-2.0% vol)	SGU-8511-H2-20K	Hydrogen 50% LEL	34L · 34-19-7500 · $70
H2 (0-2000 ppm)	SGU-8541-H2-2K	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
H2 (0-4000 ppm)	SGU-8541-H2-4K	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
H2S (0-30 ppm)	ESU-237IF-H2S30	Hydrogen sulfide 25 ppm	11L · FX11-111-025 · $55
HBr (0-6.00 ppm)	ESU-23E-HBR-06	Hydrogen bromide Not stocked as a standalone cylinder — ask us.
HBr (0-9.00 ppm)	ESU-23E-HBR-09	Hydrogen bromide Not stocked as a standalone cylinder — ask us.
HCN (0-15 ppm)	ESU-23DH-HCN	Hydrogen cyanide 10 ppm	34L · FX34-108-010 · $254
HCl (0-15 ppm)	ESU-23E-HCL-15	Hydrogen chloride Not stocked as a standalone cylinder — ask us.
HCl (0-6.00 ppm)	ESU-23E-HCL-06	Hydrogen chloride Not stocked as a standalone cylinder — ask us.
HF (0-9.0 ppm)	ESU-K233-HF-09	Hydrogen fluoride Not stocked as a standalone cylinder — ask us.
LEL (0 - 5000 ppm)	SGU-8511-CH4-5K	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
LEL (0-2.0% vol)	SGU-8511-CH4-20	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
LEL (0-2000 ppm)	SGU-8581-CH4-2K	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
NH3 (0-75 ppm)	ESU-23R-NH3	Ammonia 25 ppm	34L · FX34-106-025 · $239
NO (0-100 ppm)	ESU-23A-NO	Nitric oxide Not stocked as a standalone cylinder — ask us.
NO2 (0-15 ppm)	ESU-23AR-NO2-15	Nitrogen dioxide 10 ppm	34L · FX34-123-010 · $239
NO2 (0-9 ppm)	ESU-23AR-NO2-09	Nitrogen dioxide 10 ppm	34L · FX34-123-010 · $239
O3 (0-0.60 ppm)	ESU-K239C-S-O3	Ozone Not stocked as a standalone cylinder — ask us.
PH3 (0-1.0 ppm)	ESU-23AH-PH3	Phosphine 5 ppm	34L · FX34-124-05 · $244
Si2H6 (0-15 ppm)	ESU-23DH-SI2H6	Disilane Not stocked as a standalone cylinder — ask us.

RKI Instruments GD-70D (Toxic Gases) fixed detector

Unit part numbers: GD-70DEA-ACET, GD-70DEA-ASH3, GD-70DEA-ASH350, GD-70DEA-B2H6, GD-70DEA-BR2, GD-70DEA-BTBAS · +59 more (search any part number)

Gas configurations for this unit

CH4COH2HBrHCNHFLELNH3NONO2O2O3PH3

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
AsH3 (0-0.20 ppm)	ESU-C23F-ASH3	Arsine Not stocked as a standalone cylinder — ask us.
AsH3 (0-50 ppb)	ESU-C23F-S-ASH3	Arsine Not stocked as a standalone cylinder — ask us.
B2H6 (0-0.30 ppm)	ESU-23AY-B2H6	Diborane Not stocked as a standalone cylinder — ask us.
CO (0-150 ppm)	ESU-23-CO-150	Carbon monoxide 50 ppm	34L · 34-10-0050 · $74
Cl2 (0-3.0 ppm)	ESU-K235-CL2-3	Chlorine 10 ppm	34L · FX34-130-10 · $239
Cl2 (0-3.00 PPM)	ESU-K235L-CL2-3	Chlorine 10 ppm	34L · FX34-130-10 · $239
ClF3 (0-0.60 ppm)	ESU-K233CS-CLFA	Chlorine trifluoride Not stocked as a standalone cylinder — ask us.
F2 (0-3.0 ppm)	ESU-K235-F2-3	Fluorine Not stocked as a standalone cylinder — ask us.
GeH4 (0-0.80 ppm)	ESU-23DH-GEH4	Germane Not stocked as a standalone cylinder — ask us.
H2 (0 - 500 ppm)	SGU-8521-H2-500 · SGU-8541-H2-500	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
H2 (0-1000 ppm)	SGU-8521-H2-1K · SGU-8541-H2-1K	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
H2 (0-2.0% vol)	SGU-8511-H2-20K	Hydrogen 50% LEL	34L · 34-19-7500 · $70
H2 (0-2000 ppm)	SGU-8541-H2-2K	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
H2 (0-4000 ppm)	SGU-8541-H2-4K	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
H2S (0-30 ppm)	ESU-237IF-H2S30	Hydrogen sulfide 25 ppm	11L · FX11-111-025 · $55
HBr (0-6.00 ppm)	ESU-23E-HBR-06	Hydrogen bromide Not stocked as a standalone cylinder — ask us.
HBr (0-9.00 ppm)	ESU-23E-HBR-09	Hydrogen bromide Not stocked as a standalone cylinder — ask us.
HCN (0-15 ppm)	ESU-23DH-HCN	Hydrogen cyanide 10 ppm	34L · FX34-108-010 · $254
HCl (0-15 ppm)	ESU-23E-HCL-15	Hydrogen chloride Not stocked as a standalone cylinder — ask us.
HCl (0-6.00 ppm)	ESU-23E-HCL-06	Hydrogen chloride Not stocked as a standalone cylinder — ask us.
HF (0-9.0 ppm)	ESU-K233-HF-09	Hydrogen fluoride Not stocked as a standalone cylinder — ask us.
LEL (0 - 5000 ppm)	SGU-8511-CH4-5K	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
LEL (0-2.0% vol)	SGU-8511-CH4-20	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
LEL (0-2000 ppm)	SGU-8581-CH4-2K	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
NH3 (0-75 ppm)	ESU-23R-NH3	Ammonia 25 ppm	34L · FX34-106-025 · $239
NO (0-100 ppm)	ESU-23A-NO	Nitric oxide Not stocked as a standalone cylinder — ask us.
NO2 (0-15 ppm)	ESU-23AR-NO2-15	Nitrogen dioxide 10 ppm	34L · FX34-123-010 · $239
NO2 (0-9 ppm)	ESU-23AR-NO2-09	Nitrogen dioxide 10 ppm	34L · FX34-123-010 · $239
O3 (0-0.60 ppm)	ESU-K239C-S-O3	Ozone Not stocked as a standalone cylinder — ask us.
PH3 (0-1.0 ppm)	ESU-23AH-PH3	Phosphine 5 ppm	34L · FX34-124-05 · $244
Si2H6 (0-15 ppm)	ESU-23DH-SI2H6	Disilane Not stocked as a standalone cylinder — ask us.

RKI Instruments M-Series fixed detector

Unit part numbers: 65-2424RK, 65-2434RK, RI-257-XXX

Gas configurations for this unit

COH2S

RKI Instruments M2A-XL (Explosion Proof) fixed detector

Unit part numbers: 65-2640XL, 65-2640XL-05, 65-2647XL, 65-2647XL-05, 65-2667XL-CH4, 65-2667XL-HC · +13 more (search any part number)

Gas configurations for this unit

CH4COCO2H2H2SHCNLELO2

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
CO2 (0-100% Volume)	61-0191RK-10	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
CO2 (0-5% Volume)	61-0191RK-03	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
CO2 (0-5,000 ppm)	61-0191RK-02	Carbon dioxide 5,000 ppm	34L · 34-08-3300 · $70
CO2 (0-50% Volume)	61-0191RK-05	Match the concentration stored in the device — ask us and we'll match a cylinder to it.

RKI Instruments M2A-XL (Non-Explosion Proof) fixed detector

Unit part numbers: 65-2670XL-NH375, 65-2670XL-NH3-1, 65-2670XL-NH3-2, 65-2670XL-NH3-5, 65-2663XL, 65-2670XL-CL2-3 · +19 more (search any part number)

Gas configurations for this unit

COCO2Cl2H2SHCNNH3NO2O2PH3SO2

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
CO2 (0-100% Volume)	61-0191RK-10	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
CO2 (0-5% Volume)	61-0191RK-03	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
CO2 (0-5,000 ppm)	61-0191RK-02	Carbon dioxide 5,000 ppm	34L · 34-08-3300 · $70
CO2 (0-50% Volume)	61-0191RK-05	Match the concentration stored in the device — ask us and we'll match a cylinder to it.

RKI Instruments OX-600 fixed detector

Unit part numbers: 72-1004, 72-1004-03, 72-1004-05, 72-1004-10, 72-1004-20, 72-1005 · +9 more (search any part number)

Sensor	Calibrates to
O2	Oxygen 20.9% (zero air) — span

Source: universal

RKI Instruments PS 2 fixed detector

Unit part numbers: 73-1020RK-01, 73-1021RK-01, 73-1022RK-01

Sensor	Calibrates to
LEL	Methane 50% LEL

Source: brand-standard (RKI mix 116)

RKI Instruments RI-600 fixed detector

Unit part numbers: 73-1205-02K, 73-1205-05K, 73-1205-10K, 73-1205-20K, 73-1205-50K, 73-1206-02K · +4 more (search any part number)

Sensor	Calibrates to
CO2	Carbon dioxide 5,000 ppm

Source: standard-target

RKI Instruments S2 Series fixed detector

Unit part numbers: 65-2341-CLO2-3, 65-2397RK-02, 65-2397RK-03, 65-2397RK-05, 65-2320RK, 65-2321RK · +52 more (search any part number)

Gas configurations for this unit

CH4COCO2Cl2H2H2SHCNLELNH3NONO2O2PH3SO2

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
CO2 (0-100% Volume)	61-0191RK-10	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
CO2 (0-5% Volume)	61-0191RK-03	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
CO2 (0-5,000 ppm)	61-0191RK-02	Carbon dioxide 5,000 ppm	34L · 34-08-3300 · $70
CO2 (0-50% Volume)	61-0191RK-05	Match the concentration stored in the device — ask us and we'll match a cylinder to it.

RKI Instruments SD-1 fixed detector

Unit part numbers: SD-1EC-CO-75, SD-1OX-HS, SD-1EC-H2S-HS, SD-1EC-CO-HS, SD-1OX-H, SD-1EC-H2S-H · +16 more (search any part number)

Gas configurations for this unit

CH4COCO2H2H2SLELO2

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
CO (0-75 ppm)	ES-831-CO	Carbon monoxide 50 ppm	34L · 34-10-0050 · $74
H2S (0-30 ppm)	ES-837RP	Hydrogen sulfide 25 ppm	11L · FX11-111-025 · $55
LEL (0-100% LEL)	NC-6245	Methane 50% LEL	34L · 34-23-8600 · $70
LEL (See specifications)	NC-6239	Methane 50% LEL	34L · 34-23-8600 · $70
O2 (0-25% vol)	OS-B11E-A	Oxygen 20.9% (zero air) — span; Nitrogen 99.999% UHP — zero Not stocked as a standalone cylinder — ask us.

RKI Instruments T2A fixed detector

Unit part numbers: 66-6203-2K, 66-6204-99, 66-6204-20, 66-6204-30, 66-6205-15, 66-6205-30 · +33 more (search any part number)

Gas configurations for this unit

COCl2ETOH2H2SHCNHClHFLELNH3NONO2O2O3PH3SO2

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
AsH3 (0 - 1 ppm)	66-0068	Arsine Not stocked as a standalone cylinder — ask us.
CO (0 - 1000 ppm)	66-0001	Carbon monoxide 50 ppm	34L · 34-10-0050 · $74
Cl2 (See specifications)	66-0012	Chlorine 10 ppm	34L · FX34-130-10 · $239
H2 (0 - 100% LEL; 0-4% vol)	66-0039	Hydrogen 50% LEL	34L · 34-19-7500 · $70
H2S (0 - 100 ppm)	66-0003-1	Hydrogen sulfide 25 ppm	11L · FX11-111-025 · $55
H2S (See specifications)	66-0003-2	Hydrogen sulfide 25 ppm	11L · FX11-111-025 · $55
HCN (0 - 50 ppm)	66-0005	Hydrogen cyanide 10 ppm	34L · FX34-108-010 · $254
HCl (See specifications)	66-0004-1 · 66-0004-2	Hydrogen chloride Not stocked as a standalone cylinder — ask us.
HF (0 - 10 ppm)	66-0014	Hydrogen fluoride Not stocked as a standalone cylinder — ask us.
NH3 (See specifications)	66-0006-2 · 66-0006L-1 · 66-0006N-1 · 66-0006N-2	Ammonia 25 ppm	34L · FX34-106-025 · $239
NO (See specifications)	66-0007	Nitric oxide Not stocked as a standalone cylinder — ask us.
NO2 (0 - 20 ppm)	66-0008	Nitrogen dioxide 10 ppm	34L · FX34-123-010 · $239
O2 (0 - 25 % vol)	66-0002	Oxygen 20.9% (zero air) — span; Nitrogen 99.999% UHP — zero Not stocked as a standalone cylinder — ask us.
O3 (0 - 5 ppm)	66-0009-1	Ozone Not stocked as a standalone cylinder — ask us.
PH3 (0 - 5 ppm)	66-0015	Phosphine 5 ppm	34L · FX34-124-05 · $244
SO2 (0 - 20 ppm)	66-0010	Sulfur dioxide 10 ppm	34L · FX34-126-010 · $163

RKI Instruments T3A fixed detector

Unit part numbers: 66-6303-02, 66-6339-40, 66-6304-99, 66-6304-20, 66-6304-30, 66-6305-50 · +31 more (search any part number)

Gas configurations for this unit

CH4COCO2Cl2ETOH2H2SHCNHClHFLELNH3NONO2O2O3PH3SO2

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
AsH3 (0 - 1 ppm)	66-0068	Arsine Not stocked as a standalone cylinder — ask us.
CO (0 - 1000 ppm)	66-0001	Carbon monoxide 50 ppm	34L · 34-10-0050 · $74
CO2 (0 - 5 % vol)	66-0050	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
CO2 (0 - 5000 ppm)	66-0054	Carbon dioxide 5,000 ppm	34L · 34-08-3300 · $70
Cl2 (See specifications)	66-0012	Chlorine 10 ppm	34L · FX34-130-10 · $239
H2 (0 - 100% LEL; 0-4% vol)	66-0039	Hydrogen 50% LEL	34L · 34-19-7500 · $70
H2S (0 - 100 ppm)	66-0003-1	Hydrogen sulfide 25 ppm	11L · FX11-111-025 · $55
H2S (See specifications)	66-0003-2	Hydrogen sulfide 25 ppm	11L · FX11-111-025 · $55
HC (0-100% LEL)	66-0053	Methane 50% LEL	34L · 34-23-8600 · $70
HCN (0 - 50 ppm)	66-0005	Hydrogen cyanide 10 ppm	34L · FX34-108-010 · $254
HCl (See specifications)	66-0004-1 · 66-0004-2	Hydrogen chloride Not stocked as a standalone cylinder — ask us.
HF (0 - 10 ppm)	66-0014	Hydrogen fluoride Not stocked as a standalone cylinder — ask us.
LEL (0 - 100 % LEL)	66-0040 · 66-0051	Methane 50% LEL	34L · 34-23-8600 · $70
LEL (0 - 100 % vol)	66-0052	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
NH3 (See specifications)	66-0006-2 · 66-0006N-1	Ammonia 25 ppm	34L · FX34-106-025 · $239
NO (See specifications)	66-0007	Nitric oxide Not stocked as a standalone cylinder — ask us.
NO2 (0 - 20 ppm)	66-0008	Nitrogen dioxide 10 ppm	34L · FX34-123-010 · $239
O2 (0 - 25 % vol)	66-0002	Oxygen 20.9% (zero air) — span; Nitrogen 99.999% UHP — zero Not stocked as a standalone cylinder — ask us.
O3 (0 - 5 ppm)	66-0009-1	Ozone Not stocked as a standalone cylinder — ask us.
PH3 (0 - 5 ppm)	66-0015	Phosphine 5 ppm	34L · FX34-124-05 · $244
SO2 (0 - 20 ppm)	66-0010	Sulfur dioxide 10 ppm	34L · FX34-126-010 · $163

Senko

SENKO's own manuals were located on dealer sites: MGT and SGT values are shown on those units. Models without published values say so — SENKO specifies calibrating with gas matched to the concentrations stored in the device.

Senko DUO TRACER

Unit part numbers: AAA118194, AAA118197, AAA118198, AAA118199, AAA118200, AAA118201 · +9 more (search any part number)

Sensors on this unit

O2NH3NO2SO2LELCO2COH2SH2O3

SENKO publishes no default span for this sensor — calibrate with gas matched to the concentration stored in the device.

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
CO	ACC000102	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
CO2	ACS000002	Carbon dioxide 5,000 ppm SENKO publishes no default span; the gas shown is a CPS stocked option, not a SENKO-published default — match the concentration set in the instrument.	34L · 34-08-3300 · $70
H2	ACC000105	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
H2S	ACC000103	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
LEL	ACS000001	Methane 50% LEL SENKO publishes no default span; the gas shown is a CPS stocked option, not a SENKO-published default — match the concentration set in the instrument.	34L · 34-23-8600 · $70
NH3	ACC000107	Ammonia 25 ppm SENKO publishes no default span; the gas shown is a CPS stocked option, not a SENKO-published default — match the concentration set in the instrument.	34L · FX34-106-025 · $239
NO2	ACC000106	Nitrogen dioxide 10 ppm SENKO publishes no default span; the gas shown is a CPS stocked option, not a SENKO-published default — match the concentration set in the instrument.	34L · FX34-123-010 · $239
O2	ACC000101	Oxygen 20.9% (zero air) — span; Nitrogen 99.999% UHP — zero Not stocked as a standalone cylinder — ask us. SENKO publishes no default span; the gas shown is a CPS stocked option, not a SENKO-published default — match the concentration set in the instrument.
SO2	ACC000104	Sulfur dioxide 10 ppm SENKO publishes no default span; the gas shown is a CPS stocked option, not a SENKO-published default — match the concentration set in the instrument.	34L · FX34-126-010 · $163

Senko iGas CO2

Unit part numbers: AAA077025

Sensors on this unit

CO2

SENKO publishes no default span for this sensor — calibrate with gas matched to the concentration stored in the device.

Senko SP-MGT

Unit part numbers: AAA067056, AAA067131, AAA067270, AAA067048, AAA067257, AAA067002 · +5 more (search any part number)

Sensor	Calibrates to
LEL	Methane 50% LEL
O2	Oxygen 17%
CO	Carbon monoxide 100 ppm
H2S	Hydrogen sulfide 25 ppm

Source: SENKO MGT User Manual §5.2 (manufacturer manual; copy hosted by International Gas Detectors)

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
CO/H2S	ACA006001	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
LEL	ACJ000001 · ACK000001	Methane 50% LEL SENKO publishes no default span; the gas shown is a CPS stocked option, not a SENKO-published default — match the concentration set in the instrument.	34L · 34-23-8600 · $70
O2	ACC000901	Oxygen 20.9% (zero air) — span; Nitrogen 99.999% UHP — zero Not stocked as a standalone cylinder — ask us. SENKO publishes no default span; the gas shown is a CPS stocked option, not a SENKO-published default — match the concentration set in the instrument.

Senko SP-MGTP

Unit part numbers: AAA104056, AAA104142, AAA104153, AAA104160, AAA104152, AAA103173 · +30 more (search any part number)

Sensor	Calibrates to
LEL	Methane 50% LEL
O2	Oxygen 17%
CO	Carbon monoxide 100 ppm
H2S	Hydrogen sulfide 25 ppm

Source: SENKO MGT User Manual §5.2 (manufacturer manual; copy hosted by International Gas Detectors)

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
NO	—	Nitric oxide Not stocked as a standalone cylinder — ask us. SENKO publishes no default span; the gas shown is a CPS stocked option, not a SENKO-published default — match the concentration set in the instrument.
H2O2	—	Hydrogen peroxide Not stocked as a standalone cylinder — ask us. SENKO publishes no default span; the gas shown is a CPS stocked option, not a SENKO-published default — match the concentration set in the instrument.
CH4/CO2	ACI000067	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
CO/H2S	ACA006001	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
Cl2	ACA005006	Chlorine 10 ppm SENKO publishes no default span; the gas shown is a CPS stocked option, not a SENKO-published default — match the concentration set in the instrument.	34L · FX34-130-10 · $239
H2	ACA005007	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
HCN	ACH000010	Hydrogen cyanide 10 ppm SENKO publishes no default span; the gas shown is a CPS stocked option, not a SENKO-published default — match the concentration set in the instrument.	34L · FX34-108-010 · $254
HCl	ACH000003	Hydrogen chloride Not stocked as a standalone cylinder — ask us. SENKO publishes no default span; the gas shown is a CPS stocked option, not a SENKO-published default — match the concentration set in the instrument.
HF	ACH000005	Hydrogen fluoride Not stocked as a standalone cylinder — ask us. SENKO publishes no default span; the gas shown is a CPS stocked option, not a SENKO-published default — match the concentration set in the instrument.
LEL	ACJ000001 · ACK000001	Methane 50% LEL SENKO publishes no default span; the gas shown is a CPS stocked option, not a SENKO-published default — match the concentration set in the instrument.	34L · 34-23-8600 · $70
NH3	ACF000001	Ammonia 25 ppm SENKO publishes no default span; the gas shown is a CPS stocked option, not a SENKO-published default — match the concentration set in the instrument.	34L · FX34-106-025 · $239
NO2	ACA005005	Nitrogen dioxide 10 ppm SENKO publishes no default span; the gas shown is a CPS stocked option, not a SENKO-published default — match the concentration set in the instrument.	34L · FX34-123-010 · $239
O2	ACC000901	Oxygen 20.9% (zero air) — span; Nitrogen 99.999% UHP — zero Not stocked as a standalone cylinder — ask us. SENKO publishes no default span; the gas shown is a CPS stocked option, not a SENKO-published default — match the concentration set in the instrument.
PID (0~100 ppm, 10.0 eV)	ACL000016	Isobutylene 100 ppm SENKO publishes no default span; the gas shown is a CPS stocked option, not a SENKO-published default — match the concentration set in the instrument.	34L · 34-21-0100 · $74
PID (0~40 ppm, 10.6 eV)	ACL000012	Isobutylene 100 ppm SENKO publishes no default span; the gas shown is a CPS stocked option, not a SENKO-published default — match the concentration set in the instrument.	34L · 34-21-0100 · $74
PID (0~4000 ppm, 10.6 eV)	ACL000010	Isobutylene 100 ppm SENKO publishes no default span; the gas shown is a CPS stocked option, not a SENKO-published default — match the concentration set in the instrument.	34L · 34-21-0100 · $74
SO2	ACB000003	Sulfur dioxide 10 ppm SENKO publishes no default span; the gas shown is a CPS stocked option, not a SENKO-published default — match the concentration set in the instrument.	34L · FX34-126-010 · $163

Senko SP-SGT

Unit part numbers: AAA066002, AAA066004, AAA066012, AAA066016, AAA066014, AAA066017 · +1 more (search any part number)

Sensor	Calibrates to
CO	Carbon monoxide 100 ppm
H2	Hydrogen 500 ppm
H2S	Hydrogen sulfide 50 ppm
NH3	Ammonia 100 ppm
NO2	Nitrogen dioxide 10 ppm
SO2	Sulfur dioxide 10 ppm
O2	SENKO publishes no default span for this sensor — calibrate with gas matched to the concentration stored in the device.

Source: SENKO SGT User Manual (manufacturer manual; third-party hosted copy)

Senko SP-SGTP

Unit part numbers: AAA064002, AAA064004, AAA064012, AAA064016, AAA064014, AAA064017 · +5 more (search any part number)

Sensor	Calibrates to
Cl2	Chlorine 10 ppm
HCN	SENKO publishes no default span for this sensor — calibrate with gas matched to the concentration stored in the device.
NH3	Ammonia 100 ppm
NO2	Nitrogen dioxide 10 ppm
PH3	SENKO publishes no default span for this sensor — calibrate with gas matched to the concentration stored in the device.
SO2	Sulfur dioxide 10 ppm
O2	SENKO publishes no default span for this sensor — calibrate with gas matched to the concentration stored in the device.
CO	Carbon monoxide 100 ppm
H2S	Hydrogen sulfide 50 ppm
H2	Hydrogen 500 ppm
HCl	SENKO publishes no default span for this sensor — calibrate with gas matched to the concentration stored in the device.

Source: SENKO SGT User Manual (manufacturer manual; third-party hosted copy)

Other sensors that fit this unit

Sensor	Sensor part #	Calibrates to
CO	ACA005001	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
Cl2	ACA005008-CL2	Chlorine 10 ppm SENKO publishes no default span; the gas shown is a CPS stocked option, not a SENKO-published default — match the concentration set in the instrument.	34L · FX34-130-10 · $239
H2	ACA005007	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
H2S	ACA005003	Match the concentration stored in the device — ask us and we'll match a cylinder to it.
HCN	ACA005008-HCN	Hydrogen cyanide 10 ppm SENKO publishes no default span; the gas shown is a CPS stocked option, not a SENKO-published default — match the concentration set in the instrument.	34L · FX34-108-010 · $254
HCl	ACA005008-HCL	Hydrogen chloride Not stocked as a standalone cylinder — ask us. SENKO publishes no default span; the gas shown is a CPS stocked option, not a SENKO-published default — match the concentration set in the instrument.
NH3	ACA005008-NH3	Ammonia 25 ppm SENKO publishes no default span; the gas shown is a CPS stocked option, not a SENKO-published default — match the concentration set in the instrument.	34L · FX34-106-025 · $239
NO2	ACA005005	Nitrogen dioxide 10 ppm SENKO publishes no default span; the gas shown is a CPS stocked option, not a SENKO-published default — match the concentration set in the instrument.	34L · FX34-123-010 · $239
O2	ACC000901	Oxygen 20.9% (zero air) — span; Nitrogen 99.999% UHP — zero Not stocked as a standalone cylinder — ask us. SENKO publishes no default span; the gas shown is a CPS stocked option, not a SENKO-published default — match the concentration set in the instrument.
SO2	ACB000003	Sulfur dioxide 10 ppm SENKO publishes no default span; the gas shown is a CPS stocked option, not a SENKO-published default — match the concentration set in the instrument.	34L · FX34-126-010 · $163

Senko V-PRO

Unit part numbers: AAA141177, AAA142263

Sensors on this unit

PID

SENKO publishes no default span for this sensor — calibrate with gas matched to the concentration stored in the device.

Senko SI-200E fixed detector

Unit part numbers: ABA127002, ABA127002LF, ABA127193, ABA127004, ABA127180, ABA127012 · +40 more (search any part number)

Gas configurations for this unit

ETOLELVOC

Senko SI-301 fixed detector

Unit part numbers: ABA105002, ABA105004, ABA105169, ABA105169-500, ABA105114, ABA105104 · +18 more (search any part number)

Gas configurations for this unit

LEL

Senko SI-H100 fixed detector

Unit part numbers: ABA099090, ABA099110, ABA099108, ABA099223, ABA099102, ABA099031 · +50 more (search any part number)

Gas configurations for this unit

CH4COCOSCl2H2H2SHBrHFLELNH3NONO2O2O3PH3SO2VOC

Sensit Technologies

Sensit Technologies HXG-2d

Unit part numbers: 906-00000-08, 906-00000-09, 906-00000-12

Sensor	Calibrates to
LEL	Methane 50% LEL

Source: standard-target

Sensit Technologies HXG-3

Unit part numbers: 907-00000-01, 907-00000-02

Sensor	Calibrates to
LEL	Methane 50% LEL

Source: standard-target

Sensit Technologies HXG-3P

Unit part numbers: 907-00000-07, 907-00000-08

Sensor	Calibrates to
LEL	Methane 50% LEL

Source: standard-target

Sensit Technologies P100

Unit part numbers: 912-00000-03, 912-00000-04, 912-00000-05, 912-00000-06, 912-00000-07, 912-00000-08 · +8 more (search any part number)

Sensor	Calibrates to
CO (% range label)	No manufacturer default published — match the concentration set in the instrument.
H2S	Hydrogen sulfide 25 ppm
HCN	Hydrogen cyanide 10 ppm
NO2	Nitrogen dioxide 10 ppm
SO2	Sulfur dioxide 10 ppm
O2	Oxygen 20.9% (zero air) — span

Source: unresolved · universal-default · standard-target · universal

Sensit Technologies SENSIT CO

Unit part numbers: 913-00000-04, 913-00000-10

Sensor	Calibrates to
CO	Carbon monoxide 50 ppm
O2	Oxygen 20.9% (zero air) — span

Source: universal-default · universal

Sensit Technologies SENSIT GOLD

Unit part numbers: 909-00000-A, 909-00000-B, 909-00000-C, 909-00000-D, 909-00000-E, 909-00000-F · +3 more (search any part number)

Sensor	Calibrates to
LEL	Methane 50% LEL
O2	Oxygen 20.9% (zero air) — span
CO	Carbon monoxide 50 ppm
H2S	Hydrogen sulfide 25 ppm
HCN	Hydrogen cyanide 10 ppm

Source: universal-default · standard-target

Sensit Technologies SENSIT GOLD 100

Unit part numbers: 910-00100-A, 910-00100-B, 910-00100-C, 910-00100-D, 910-00100-E, 910-00100-F · +3 more (search any part number)

Sensor	Calibrates to
LEL	Methane 50% LEL
O2	Oxygen 20.9% (zero air) — span
CO	Carbon monoxide 50 ppm
H2S	Hydrogen sulfide 25 ppm
LEL %Vol	No manufacturer default published — match the concentration set in the instrument.

Source: universal-default · unresolved

Sensit Technologies SENSIT GOLD G2

Unit part numbers: 911-00000-01, 911-00000-02, 911-00000-03, 911-00000-04, 911-00000-05, 911-00000-06 · +3 more (search any part number)

Sensor	Calibrates to
LEL	Methane 50% LEL
O2	Oxygen 20.9% (zero air) — span
CO	Carbon monoxide 50 ppm
H2S	Hydrogen sulfide 25 ppm
HCN	Hydrogen cyanide 10 ppm

Source: universal-default · standard-target

Sensit Technologies SENSIT GOLD G3

Unit part numbers: 945-00000-1000-G, 945-00000-1000, 945-00000-1100-G, 945-00000-1100, 945-00000-1200-G, 945-00000-1200 · +16 more (search any part number)

Sensor	Calibrates to
LEL	Methane 50% LEL
O2	Oxygen 20.9% (zero air) — span
CO	Carbon monoxide 50 ppm
H2S	Hydrogen sulfide 25 ppm
HCN	Hydrogen cyanide 10 ppm

Source: universal-default · standard-target

Sensit Technologies SENSIT HCN

Unit part numbers: 913-00000-11, 913-00000-12

Sensor	Calibrates to
HCN	Hydrogen cyanide 10 ppm
CO	Carbon monoxide 50 ppm

Source: standard-target · universal-default

Sensit Technologies T4x

Unit part numbers: 933-00000-01, 933-00000-02, 933-00000-03, 933-00000-04, 933-00000-05, 933-00000-06

Sensor	Calibrates to
LEL	Methane 50% LEL
O2	Oxygen 20.9% (zero air) — span
CO	Carbon monoxide 50 ppm
H2S	Hydrogen sulfide 25 ppm

Source: universal-default

Sensit Technologies Trak-It IIIa

Unit part numbers: 920-00000-01, 920-00000-02, 920-00000-03, 920-00000-04, 920-00000-05, 920-00000-06 · +12 more (search any part number)

Sensor	Calibrates to
LEL	Methane 50% LEL
O2	Oxygen 20.9% (zero air) — span
CO	Carbon monoxide 50 ppm
H2S	Hydrogen sulfide 25 ppm
HCN	Hydrogen cyanide 10 ppm

Source: universal-default · standard-target

Honeywell BW

Values per the BW GasAlertMicroClip manual (D5908), which lists the standard quad cylinder.

Honeywell BW published standard

Honeywell BW quad cylinder CG-Q34-4 (34 L) / CG-Q58-4 (58 L): CH4 2.5% / O2 18.0% / H2S 25 ppm / CO 100 ppm, balance N2

Source: Honeywell support article (BW quad cylinder CG-Q34-4 / CG-Q58-4), sps-support.honeywell.com

Sensor	Calibrates to
LEL	Methane 50% LEL
O2	Oxygen 18%
CO	Carbon monoxide 100 ppm
H2S	Hydrogen sulfide 25 ppm

CPS calibration gas for these instruments

4-Gas Calibration Gas – BW Equivalent – H₂S 25 / CO 100 / CH₄ 50% LEL / O₂ 18%

34L · FX34-155-5300 · $195 60L · FX60-155-5300 · $245 120L · FX120-155-5300 · $295 11L · FX11-155-5300 · $90 44L · FX44-155-5300 · $210 66L · FX66-155-5300 · $275

Matches the manufacturer's published standard mix above.

Dräger

The standard below is Dräger's own standard mixed gas cylinder 68 11 130, per the X-am technical manuals.

Dräger published standard

Dräger standard mixed gas cylinder 68 11 130: CO 50 ppm / H2S 15 ppm / CH4 2.5 vol% / O2 18 vol%

Source: Technical Manual X-am 3500/8000, 9033665 en Ed. 9, draeger.com (standard mixed gas cylinder 68 11 130); X-am 5000 Technical Manual 9023999 Ed. 17, draeger.com

Sensor	Calibrates to
LEL	Methane 2.5 vol% (50% LEL)
O2	Oxygen 18 vol%
CO	Carbon monoxide 50 ppm
H2S	Hydrogen sulfide 15 ppm

CPS calibration gas for these instruments

4-Gas Calibration Gas – Dräger Equivalent – H₂S 25 / CO 100 / CH₄ 50% LEL / O₂ 17%

34L · FX34-155-5100 · $195 60L · FX60-155-5100 · $245 120L · FX120-155-5100 · $295 11L · FX11-155-5100 · $90 44L · FX44-155-5100 · $210 66L · FX66-155-5100 · $275

This CPS blend's concentrations differ from the manufacturer's standard cylinder above. It can be used when the instrument's span values are set to this cylinder's concentrations, which fall within the manufacturer's allowed calibration ranges.

MSA

MSA published standard

MSA quad calibration cylinder (58 L): CH4 1.45% / O2 15% / CO 60 ppm / H2S 20 ppm · Cylinder 10045035 (North America) / 10053022 (Europe)

Source: ALTAIR 4XR Operating Manual 10175896, docs.msasafety.com (quad cylinder 10045035 NA / 10053022 EU); ALTAIR 5X PID Operating Manual 10165710, docs.msasafety.com

Sensor	Calibrates to
LEL	Pentane 58% LEL
O2	Oxygen 15%
CO	Carbon monoxide 60 ppm
H2S	Hydrogen sulfide 20 ppm

CPS calibration gas for these instruments

4-Gas Calibration Gas – MSA Equivalent – H₂S 20 / CO 60 / Pentane 58% LEL / O₂ 15%

34L · FX34-150-100 · $195 60L · FX60-150-100 · $185 120L · FX120-150-100 · $295 11L · FX11-150-100 · $90 44L · FX44-150-100 · $210 66L · FX66-150-100 · $275

Matches the manufacturer's published standard mix above.

RAE Systems

Values per the QRAE 3 User's Guide (M02-4001-000), Standard Span Values table.

RAE Systems published standard

Honeywell RAE four-gas calibration mix P/N 610-0050-007 (34 L): CO 50 ppm / H2S 10 ppm / CH4 50% LEL / O2 18% (balance not stated)

Source: Honeywell support article (MultiRAE standard four-gas mix P/N 610-0050-007), sps-support.honeywell.com

Sensor	Calibrates to
LEL	Methane 50% LEL
O2	Oxygen 18%
CO	Carbon monoxide 50 ppm
H2S	Hydrogen sulfide 10 ppm
SO2	Sulfur dioxide 5 ppm
HCN	Hydrogen cyanide 10 ppm
NH3	Ammonia 50 ppm
PH3	Phosphine 5 ppm
Cl2	Chlorine 10 ppm
NO2	Nitrogen dioxide 5 ppm

CPS calibration gas for these instruments

4-Gas Calibration Gas – RAE Systems Equivalent – H₂S 10 / CO 50 / CH₄ 50% LEL / O₂ 18%

34L · FX34-140-2500 · $195 60L · FX60-140-2500 · $245 120L · FX120-140-2500 · $295 11L · FX11-140-2500 · $90 44L · FX44-140-2500 · $210 66L · FX66-140-2500 · $275

Matches the manufacturer's published standard mix above.

Crowcon

Values are Crowcon's published T4 quad values, from the T4 manual. The Gasman is a single-gas detector — it has no quad mix; its calibration value is stored in the sensor i-module.

Crowcon published standard

Crowcon T4 quad gas (per T4 manual): H2S 15 ppm / CO 100 ppm / O2 18% VOL / CH4 50% LEL (2.2% VOL); balance not named in the manual

Source: T4 User & Operator Manual M070044 Issue 7, crowcon.com

Sensor	Calibrates to
LEL	Methane 50% LEL (2.2% VOL)
O2	Oxygen 18% VOL
CO	Carbon monoxide 100 ppm
H2S	Hydrogen sulfide 15 ppm

GMI (Teledyne)

The PS200's factory calibration values are below. Teledyne's Combi Test Gas cylinder 99146 (CH₄ 2.5% / CO 500 ppm / H₂S 50 ppm / O₂ 18%) is a separate higher-concentration accessory — it can only be used after the instrument's stored calibration values are changed to match it.

GMI (Teledyne) published standard

PS200 factory pre-defined calibration values (per PS200 User Manual): 50% LEL / O2 18% / CO 100 ppm / H2S 25 ppm

Source: PS200 User Manual 64171 Rev 14, teledynegasandflamedetection.com

Sensor	Calibrates to
LEL	Methane 50% LEL
O2	Oxygen 18%
CO	Carbon monoxide 100 ppm
H2S	Hydrogen sulfide 25 ppm

Gas Clip Technologies

Balance gas is not stated in Gas Clip's MGC manual.

Gas Clip Technologies published standard

Gas Clip quad gas cylinder MGC-Q-58 (58 L) / MGC-Q-116 (116 L): H2S 25 ppm / CO 100 ppm / O2 18% / 50% LEL (2.5% vol methane); balance gas not stated in the manual

Source: Multi Gas Clip Infrared User's Manual UM-MGC V2.15, gascliptech.com

Sensor	Calibrates to
LEL	Methane 50% LEL (2.5% vol)
O2	Oxygen 18%
CO	Carbon monoxide 100 ppm
H2S	Hydrogen sulfide 25 ppm

Industrial Scientific

Industrial Scientific hosts no product manuals on indsci.com; values are from the Ventis Pro manual (dealer-hosted copy). Note: the manual's table lists NO2 at 25 ppm while some Industrial Scientific kit lists show 5 ppm NO2 cylinders.

Industrial Scientific published standard

Ventis Pro factory calibration gas values: CO 100 ppm / H2S 25 ppm / O2 20.9% / LEL 50% LEL methane

Source: Ventis Pro Product Manual 17156830-1 Rev 13, Table 2.7 (manufacturer manual; copy hosted by GasTech)

Sensor	Calibrates to
LEL	Methane 50% LEL (pentane 25% LEL)
O2	Oxygen 20.9%
CO	Carbon monoxide 100 ppm
H2S	Hydrogen sulfide 25 ppm
NH3	Ammonia 50 ppm
HCN	Hydrogen cyanide 10 ppm
NO2	Nitrogen dioxide 25 ppm
PH3	Phosphine 1 ppm
SO2	Sulfur dioxide 10 ppm
Cl2	Chlorine 10 ppm
CO2	Carbon dioxide 2.5% vol

Every Other Sensor

Sensor	Calibrates to
PID (VOC)	Isobutylene 100 ppm	34L · 34-21-0100 · $74
SO2	Sulfur dioxide 10 ppm	34L · FX34-126-010 · $163
NH3	Ammonia 25 ppm	34L · FX34-106-025 · $239
Cl2	Chlorine 10 ppm	34L · FX34-130-10 · $239
HCN	Hydrogen cyanide 10 ppm	34L · FX34-108-010 · $254
PH3	Phosphine 5 ppm	34L · FX34-124-05 · $244
NO2	Nitrogen dioxide 10 ppm	34L · FX34-123-010 · $239
CO2	Carbon dioxide 5,000 ppm	34L · 34-08-3300 · $70
IR LEL	Methane 50% LEL	34L · 34-23-8600 · $70
H2	Hydrogen 50% LEL	34L · 34-19-7500 · $70
LEL	Methane 50% LEL	34L · 34-23-8600 · $70
O2	Oxygen 20.9% (zero air) — span; Nitrogen 99.999% UHP — zero
CO
H2S

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