Detcon Model IR-540 & IR-542 Carbon Dioxide Sensor Spares

Code: IR-540 & IR-542
  • Obsolete
  • Former CO2 gas detector
  • Infrared sensor

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The Detcon IR-540 and IR-542 models are discontinued; replacements are detailed here and pictured. Below is a list of spares parts available for maintenance and calibration.

The non-intrusive “Smart” sensors are designed to detect and monitor Carbon Dioxide. Available ranges of detection are 0-0.3%, 0-1%, 0-3%, and 0-5% by volume. 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

965-415420-_ _ _ Model IR-540 in Aluminum Junction Box
965-41542B-_ _ _ Model IR-540-316SS in Stainless Steel Junction Box


  • cCSAus approved: Class I, Division 1, Groups B, C, & D
  • 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 IR-540/542-CO2 Infrared Sensor Assembly 

370-365878-111 Carbon Dioxide plug-in optical sensor (up to 5% range)
370-287724-232 Carbon Dioxide plug-in optical sensor (10 to 100% range)
925-405400-003 Plug-in transmitter control module (Model IR-540)
500-002226-001 Standard connector board Model series 500 IR sensors
390-000088-000 Stainless steel sensor housing assembly CO2
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