12 M2A Transmitter Operator’s Manual
Infrared (IR) Detectors
The IR combustible detectors are generally used instead of the catalytic combustible detectors in applications
where there may be catalyst poisons such as silicone present or where oxygen is not present in the monitoring
environment.
The table below outlines the M2A part numbers and replacement detector part numbers for the infrared (IR)
detectors.
Table 3: Infrared (IR) Detectors
Target Gas, Range M2A Part Number Detector Used
CH
4
, 0 - 100% LEL 65-2649RK-CH4 61-0190RK-CH4 (UL)
65-2664RK-CH4 61-0197RK-CH4
CH
4
, 0 - 5.00% volume 65-2649RK-CH4-5 61-0190RK-CH4 (UL)
CH
4
, 0 - 100% volume 65-2658RK-CH4 61-0192RK-CH4 (UL)
65-2665RK-CH4 61-0199RK-CH4
CO
2
, 0 - 5,000 ppm 65-2660RK-02 61-0191RK-02 (UL)
65-2661RK-02 61-0198RK-02
CO
2
, 0 - 9,000 ppm 65-2660RK-01 61-0191RK-01 (UL)
65-2661RK-01 61-0198RK-01
CO
2
, 0 - 5% volume 65-2660RK-03 61-0191RK-03 (UL)
65-2661RK-03 61-0198RK-03
CO
2
, 0 - 50% volume 65-2660RK-05 61-0191RK-05 (UL)
65-2661RK-05 61-0198RK-05
CO
2
, 0 - 100% volume 65-2660RK-10 61-0191RK-10 (UL)
65-2661RK-10 61-0198RK-10
HC, 0 - 100% LEL (cal. to propane) 65-2649RK-HC 61-0190RK-HC (UL)
65-2664RK-HC 61-0197RK-HC
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