CROWCON IRmax Fixed Point Gas Detector is a compact, low power and highly rugged infrared (IR) gas detector.  CROWCON IRmax Fixed Point Gas Detector delivers rapid, fail-safe detection of many gas  and other hydrocarbon gases and vapours. The remote display can be mounted up to 30 metres from the IRmax and test gas can be applied without requiring direct access to the detector.

	IRmax	with Fixed IR display	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.