Crowcon

Crowcon IRmax Fixed Infrared Gas Detector

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SKU:
CROWCON-IRMAX
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$2,591.00 - $3,654.00

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Description

The Crowcon IRmax is an ultra-compact fixed-point infrared (IR) gas detector that delivers rapid, fail-safe detection of hydrocarbon gases and vapours in a rugged 316 stainless steel enclosure. Its Stay-ClIR optical components carry a highly durable hydrophobic coating that prevents faults due to condensation — and because there are no heated optics, the IRmax draws less than 1 W, a fraction of the power of conventional IR detectors.

Certified for Zone 1 and 2 hazardous areas, it works with virtually any control system via its industry-standard 4-20mA output, with options for HART 7 communications, RS-485 Modbus, a fixed display, a remote display mounted up to 3 metres away, or an IS barrier module. Every configuration listed here is an ATEX / IECEx build covering a flammable gas at 0–100% LEL, across 27 factory gas linearisations — Crowcon does not offer these IRmax configurations with UL/CSA certification.

How to read the configuration code: IRMX-{gas}-{thread}-011-{output}-{display} — thread AC = M20, AE = 1/2" NPT; 011 = ATEX / IECEx; output AB = 4-20mA Source, AC = 4-20mA Sink, AD = RS485 / Source, AE = RS485 / Sink, AF = HART / Source, AG = HART / Sink; display 00 = no display, 01 = fitted display, 02 = fitted display with HART, 03 = IS barrier, 04 = display-ready (display not fitted). Every configuration in the dropdown also names its gas, thread, output, display and certification in full.

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.

  • Dual-beam infrared hydrocarbon detection — fail-safe and poison-resistant, with no dependence on oxygen in the background gas
  • Stay-ClIR hydrophobic optical coating prevents condensation faults — no heated optics, ideal for offshore, wet and saline environments
  • Ultra-low power consumption: less than 1 W — smaller power supplies and battery back-up, and longer cable runs
  • Fast response: T90 in under 4 seconds
  • Industry-standard 4-20mA output, current sink or source, compatible with virtually any control system
  • HART 7 communications and RS-485 Modbus options (per configuration)
  • Display options per configuration: fixed IR display, display-ready, IS barrier module for a remote display, or no display
  • Compact 316 stainless steel enclosure, IP66 — wall mounting, 50 mm (2 in) pipe mounting, or auxiliary junction box mounting
  • Minimal routine maintenance and low cost of ownership; test gas can be applied without direct access to the detector when a remote display is fitted
  • SIL 2 functional safety validation to IEC 61508 / EN 50402
Gases & Ranges (listed configurations) Methane: 0–100% LEL; Propane: 0–100% LEL; Pentane: 0–100% LEL; Butane: 0–100% LEL; Ethylene: 0–100% LEL; Methanol: 0–100% LEL; Ethanol: 0–100% LEL; Acetone: 0–100% LEL; Hexane: 0–100% LEL; Toluene: 0–100% LEL; LPG: 0–100% LEL; Petrol vapour: 0–100% LEL; C8H10: 0–100% LEL; Butene: 0–100% LEL; Ethane: 0–100% LEL; Ethyl acetate: 0–100% LEL; Heptane: 0–100% LEL; MEK: 0–100% LEL; Propylene: 0–100% LEL; THF (tetrahydrofuran): 0–100% LEL; Butadiene: 0–100% LEL; C6H12: 0–100% LEL; Ethylene dichloride: 0–100% LEL; Propyl acetate: 0–100% LEL; Propanol: 0–100% LEL
Size 158 x 75 x 57 mm (6.2 x 2.9 x 2.3 in) — detector only; 230 x 75 x 57 mm with fixed IR display; 261 x 75 x 57 mm with IS barrier module
Weight 1.58 kg (3.5 lbs) — detector only; 2 kg (4.4 lbs) with fixed IR display; 2.4 kg (5.3 lbs) with IS barrier module
Enclosure material 316 stainless steel
Ingress protection IP66
Cable entries One M20 or 1/2" NPT cable gland entry (per configuration)
Operating voltage 12–30 V dc
Power <1 W
Electrical output 4-20mA current sink or source; 2mA dirty-optics warning (at 75% obscuration, configurable); 0mA detector fault signal (at 90% obscuration, configurable); RS-485 Modbus and HART 7 per configuration
Response time T90 <4 seconds
Repeatability ±2% FSD
Zero drift ±2% FSD per year maximum
Operating temperature -40°C to +75°C (-40°F to +167°F)
Humidity 0–95% RH non-condensing
Pressure range Atmospheric ±10%
Functional safety SIL 2 — IEC 61508, EN 50402
Approvals (per configuration) ATEX / IECEx: II 2 GD Ex d IIC T6 Gb (Tamb −40 to +50°C), T4 (Tamb −40 to +75°C), Ex tb IIIC T135°C Db; display builds Ex d ia IIC T4 Gb. Certified for use in Zone 1 & 2 and Zone 21 & 22. No UL/CSA configuration is offered in this range
EMC compliance EN 50270, FCC CFR47 Part 15B, ICES-003

Product Documents & Resources

  • IRmax Datasheet (PDF)

Document files are being added to this page. Need one now? Email info@cpscalibrations.com and we'll send it straight over.

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