IRM90 Explosion-Proof Infrared Motion Detector


The IRM90 is a passive infrared (PIR) motion detector is designed to provide maximum safety and security from occupational hazards and ensure workplace safety – even in the most hazardous and remote locations.

The detector monitors infrared radiation in the 8 to 15 micrometre range and looks for changes in this radiation such as an intruder walking through its 65 degree cone of vision, in order to relay an alarm.

The IRM90 comes with a swivel mount to make mounting and angle adjustments fast and easy. The explosion-proof housing is factory sealed to simplify installation and the electronic circuitry does not require any adjustments by the user. Normally closed relay contacts allow for connection to alarm circuitry, annunciation panels or other devices.

  • 3/4″, NPT conduit fitting for easy installation
  • Factory sealed enclosure eliminates the need for conduit seals in the field
  • Normally closed, “fail-safe” relay contacts for connection to alarm circuitry or other devices. Contacts become open when motion is detected or power is lost to the detector
  • One metre of 16 AWG cable is connected to the detector
  • No-tool swivel mount provided to adjust angle and simplify installation
Operating Voltage Range: 24 Vdc. Device can operate between 15 and 28 Vdc
Power Consumption (24 V dc): 21 mA /510 mW nominal | 30 mA/ 720 mW maximum
Operating Temperature Range: -10°C to +50°C (+14F to +122F)
Relay Output: Normally closed relay contacts with an 18 Ohm resistor in series. Rated 24 Vdc, 0.1 Amp resistive. The relay output opens when motion is detected. It reverts to a closed state 2 to 3 seconds after motion is no longer being detected. The relay will also open if power to the detector is lost.
Spectral Sensitivity Range: Responds to changes in infrared radiation levels between 8 to 15 micrometres
Weight: (with swivel) 1.6 kg ( 3.5 lb)
Enclosure Material: Powder coated or anodized aluminum – Part # IRM90-R (optional stainless steel – P/N IRM90-R-SS)
Cone of Vision: Nominal cone of vision of 65° provided by the fresnel lens attachment. The maximum range of detection is 6 metres.
Price: $0.00