ENMET Corp. manufactures infrared hydrocarbon sensors used in refinery, gas turbine, drilling, chemical plant, fuel loading facility, compressor station, oil well, wastewater, and LNG/LPG processing facility applications. The single source, dual wavelength sensors feature 4 to 20 mA output, operating voltage of 24 VDC, and a sensing range of 0-100 percent LEL. Featuring a temperature range of -40 to 158F, the sensors provide accuracy of plus or minus 3 percent 0-50 percent LEL, and plus or minus 5 percent 51-100 percent LEL.

Mil-Ram Technologies engineers infrared hydrocarbon gas detectors and infrared CO2 gas detectors. The hydrocarbon sensors feature a detection range of 0-100 percent LEL, resolution of 1 percent LEL, and a temperature of -20 to 50C. The CO2 sensors feature a detection range of 0-5 percent, resolution of 0.1 percent, and the same temperate range as the hydrocarbon detectors. Both infrared sensor types have 3 or 4-wire connection to control panel.

International Light Technologies manufactures non-dispersive infrared gas sensors for indoor air quality, cycle regulation, automotive and gas emission, greenhouse farming, hazardous area, gas leak detection, landfill gas monitoring, alcohol breathalyzer, and patient monitoring applications. The sensors can measure nearly all inorganic and organic gases, however they are typically used to measuring carbon dioxide. The sensors infrared lamp can operate from 45 mA to 150 mA with rated lifetimes from 5,000 to 100,000 hours.