Crowcon infrared gas detector IRmax

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Model: IRmax
Manufacturer: Crowcon 
Status: Stocking
Guarantee: 12 months
Price: Contact

The Crowcon IRmax Infrared Gas Detector is an ultra-compact infrared (IR) gas detector that provides fast, safe detection of hydrocarbon gases and vapors. The IRmax gas detection system offers a choice of detectors, local gas/status display, remote gas/status display, or non-intrusive calibration via IS calibration tool or communication device Handheld HART.


I. Specification Crowcon infrared gas detector IRmax

Crowcon infrared gas detector IRmax


  • The reliability of the Compact IRmax Crowcon type stationary gas detector has been proven in hot, cold, wet and salty environments, making it ideal for offshore.
  • IRmax’s unique optical components are treated with a high-strength coating  that completely prevents errors due to condensation. Since IRmax contains no components for artificially heated optical surfaces, power consumption is significantly reduced, requiring only 1W of power..

Simple to install:

  • Compact size – requires little space, effort and time to install
  • Various mounting options – Crowcon IRmax infrared gas detectors can be wall mounted, fitted into a 50mm (2 inch) hose or connected to an auxiliary junction box using mounting accessories
  • Industry standard 4-20mA output – compatible with almost any control system
  • Optional for HART and RS-485 Modbus communication.

Easy maintenance:

  • Remote non-intrusive calibration – remote display can be mounted up to 30 meters from Compact IRmax Crowcon IRmax style fixed gas detector and test gas can be applied without direct access to the detector.
  • Handheld Intrinsically Safe (IS) Calibrator – The Crowcon IRmax infrared gas detector with IS fence module attached can be checked and calibrated using the IS handheld monitor.
  • STAY-CLIR optics – prevents condensation on optical components.

Low cost:

  • Low power – consumes only 1W of power, allowing the use of a small power supply and battery backup system.
  • Automatic optical occlusion monitoring – minimal routine maintenance keeps costs down.

***View more of GMGA’s stationary gas detection and warning devices – Crowcon Vietnam at:

II. Specifications of Compact IRmax type fixed gas detector

IRmax IRmax with Fixed IR display IRmax with IS Barrier Module Remote IR Display
Size 158 x 75 x 57mm (6.2 x 2.9 x 2.3ins) 230 x 75 x 57mm (9 x 2.9 x 2.3ins) 261 x 75 x 57mm (2.3 x 2.9 x 2.3ins) 60 x 54 x 48mm (2.3 x 2.1 x 1.9ins)
Weight 1.58kg (3.5lbs) 2kg (4.4lbs) 2.4kg (5.3lbs) 0.2kg (0.4lbs)
Ingress protection IP66
Enclosure material 316 stainless steel
Power 12-30 Vdc. < 1W
Connection One M20 or 1/2” NPT cable gland entry
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 (optional), HART 7 (optional)
Operating temperature -40°C to +75°C (-40°F to 167°F)
Humidity 0 to 95% RH non-condensing
Pressure range Atmospheric +/- 10%
Repeatability +/- 2% FSD
Zero drift +/- 2% FSD per year maximum
Response time T-90 <4 seconds
Functional safety Validation to IEC61508, EN50402 SIL 2
Approvals Ex II 2 GD
Exd IIC T6 Gb (Tamb -40to+50°C),
T4 (Tamb -40to+75°C)
Ex tb IIIC T135°C Db (Tamb -40 to +75°C)
Ex II 2 G
Exd ia IIC T4 Gb (Tamb -40to+75°C)
Ex II 2 GD
Exd ia IIC T4 Gb (Tamb -40to+75°C)
Ex tb IIIC T135°C Db (Tamb -40 to +40°C)
EMC compliance Directive 2014/30 EU: EN50270, FCC CFR47 Part 15B, ICES-003
Zones Certified for use in Zone 1 & 2.


***Video fixed gas detectors are available at: Gmga Measuring Youtube.


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