Detcon Model IR-622 Combustible Sensor Spares

Code: IR-622-CH
  • Obsolete
  • Former Combustible gas detector
  • Infrared sensor

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The Detcon IR-622 models are discontinued replacements are detailed here and pictured. Below is a list of spares parts available for maintenance and calibration.

Non-intrusive “Smart” sensors are designed to detect and monitor Combustible Hydrocarbons over the range of 0-100% LEL (lower explosive limit). The sensor assembly consists of a miniature infrared optical sensor in a stainless steel housing that includes a splashguard with an integral calibration port, a plug-in control transmitter circuit, a base connector board and an explosion-proof enclosure.

Two choices of MicroSafe detector

966-224520-100 Model IR-622 in Aluminum Junction Box
966-22452B-100 Model IR-622-316SS in Stainless Steel Junction Box


  • cCSAus approved: Class I, Division 1, Groups B, C, & D
  • Compatible with PLCs, SCADA, DCS, via 4-20 mA, and/or RS-485, and/or alarm relays
  • Sensor status and parameters accessible via RS-485 (Modbus™)
  • Menu programmable relays standard (two alarms plus fault)
  • Simple menu-driven calibration – takes less than 3 minutes
  • Backlit LCD and LED indicators for FAULT and CAL status
  • Unique miniature field-replaceable optical sensor
  • Plug-in field-replaceable transmitter
  • Low power consumption
  • 5-year expected sensor life

Spare Parts  

370-365871-212 Combustible Hydrocarbon plug-in optical sensor for CH’s
926-225500-100 Plug-in transmitter control module (Model IR-622)
500-002042-000 Standard connector board Model series 600 IR sensors
390-000087-000 Stainless steel sensor housing assembly CH’s
613-120000-700 Sensor splash guard with integral cal-port – FP/DM/IR
943-000006-132 Calibration adapter FP/IR/DM/O2
975-000208-9IR Sensor Duct Mount Kit IR
612-400000-000 Sensor/Sintered Filter replacement wrench FP/DM/IR
943-002273-000 Harsh location dust guard (fits 1.5 x 18 thread)
033-003238-000 “Harsh location dust guard replacement filter for 1.5 x 18 thread (Sold in a pack of qty 20)


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Additional information

Weight 0.09 kg