Crowcon
Crowcon Xgard XG3 Fixed Flammable Gas Detector
- SKU:
- CROWCON-XG3
- Availability:
- Usually ships in 3 business days
Description
The Crowcon Xgard Type 3 (XG3) is a flameproof (Ex d) fixed-point detector for flammable gases, using a poison-resistant catalytic bead (pellistor) sensor with a 3-wire mV bridge output for connection to a gas detection control panel.
It covers the standard flammable gases at 0-100% LEL — hydrogen, methane and propane in the UL configurations listed here — and is rated for continuous operation from -40 °C to +80 °C.
How to read the configuration code: each code spells out the build — XG type, then housing and cable entry (A = aluminium, S = 316 stainless steel, N = glass-reinforced (GRP) nylon; 1 = M20, 2 = 1/2" NPT, 4 = 3/4" NPT, 5 = 2× M20), certification (01 = ATEX/IECEx, 02 = UL/cUL, 07 = INMETRO), then the gas code. Every configuration in the dropdown also names its housing, thread, gas, range and certification in full.
Certifications on this page: configurations are listed in UL/cUL, ATEX/IECEx and INMETRO builds. The certification of each configuration is stated in full at the end of its dropdown label — check it before ordering, as certifications are not interchangeable and an ATEX/IECEx or INMETRO build is not a UL/cUL unit.
Common Applications:
Oil & Gas • Petrochemical • Chemical Plants • Water & Wastewater • Steel • Power Generation • Marine & Offshore
Need help selecting the right configuration? Call CPS Calibrations at (865) 900-8844 — every configuration on this page is a factory Crowcon build, and we calibrate what we sell.
- Flameproof (Ex d) for Zone 1 or 2 and Class I, Division 1 areas
- Poison-resistant catalytic bead (pellistor) sensor for flammable gases
- 3-wire mV bridge output for control-panel systems (typical signal 12-15 mV/%LEL CH4)
- Wide operating temperature: -40 to +80 °C
- Universal Xgard junction box — sensors and sinters are plug-in, so replacement takes minutes
- Wall or ceiling mounting with no additional brackets
- Many spare parts are common to all Xgard models, keeping spares holding to a minimum
- Junction boxes in polyester-coated aluminium or 316 stainless steel (UL builds)
- Accessories available for duct mounting, sampling and remote gassing
- Spray deflectors and weatherproof caps available for washdown and offshore environments
| Gases & Ranges (listed configurations) | Hydrogen: 0–100% LEL; Ethanol: 0–100% LEL; Ethylene: 0–100% LEL; Methane: 0–100% LEL; Petrol vapour: 0–100% LEL (unleaded); Butane: 0–100% LEL; Propane: 0–100% LEL; Pentane: 0–100% LEL; Toluene: 0–100% LEL; Methanol: 0–100% LEL; Acetylene: 0–100% LEL; Vinyl chloride: 0–100% LEL; Ammonia: 0–25% LEL; Jet fuel: 0–100% LEL; LPG: 0–100% LEL; Hexane: 0–100% LEL |
| Size | 156 x 166 x 111 mm (6.1 x 6.5 x 4.3 in) |
| Weight | Aluminium: 1 kg (2.2 lbs); 316 stainless steel: 3.1 kg (6.8 lbs) |
| Enclosure material | Aluminium or 316 stainless steel (UL certified builds) |
| Ingress protection | IP65 (IP66 with weatherproof cap) |
| Cable entries | 1 x M20, 1/2" NPT or 3/4" NPT on right-side (3/4" on aluminium boxes) |
| Terminations | 0.5 to 2.5 mm² (20 to 13 AWG) |
| Sensor type | Catalytic bead (pellistor) |
| Operating temperature | -40 to +80 °C (-40 to 176 °F) |
| Humidity | 0-99% RH non-condensing |
| Repeatability | <2% FSD (typical) |
| Zero drift | <2% FSD per month (typical) |
| Response time | T90 <15 s (typical) |
| Operating voltage | 2.0 V dc ±0.1 V (bridge) |
| Power | 300 mA (typical) |
| Electrical output | 3-wire mV bridge; typical signal 12-15 mV/%LEL CH4 |
| Approvals | UL: Class I, Division 1, Groups B, C, D; ATEX: II 2 GD Ex d IIC T4 Gb / Ex d IIC T6 Gb, Ex tb IIIC; IECEx |
| EMC compliance | EN 50270, FCC Part 15, ICES-003 |
Product Documents & Resources
- Xgard XG3 Fixed Flammable Gas Detector Datasheet (PDF)
Document files are being added to this page. Need one now? Email info@cpscalibrations.com and we'll send it straight over.