Detector Electronics Corp. designs and manufactures combustible gas sensors, including infrared and catalytic detector. The company's catalytic combustible gas sensors are used in harsh industrial environments and feature a temperature range of -40F to 75F. Duct-mount infrared combustible gas sensors are used in enclosed air handling ductwork applications. Other combustible gas detecting products include display transmitters, gas controllers, power supplies, and gas control panels.

General Monitors Inc. develops and manufactures infrared point detectors that monitor combustible gases and vapors. These sensors detect a variety of combustible gases including methane, propane, ethylene, ethane, butane, hexane and pentane. Featuring 4-20mA output, these combustible gas sensors are used in refinery, drilling rig and platform, fuel loading facility, compressor station, LNG/LPG processing facility, wastewater treatment facility, gas turbine, solvent vapor, and chemical plant applications.

Honeywell Analytics designs and manufactures a number of fixed-point combustible gas sensors used in a number of industrial applications, including oil and gas, petrochemical, specialty chemical, refrigeration, water and wastewater treatment, plastic and fiber, pulp and printing, agriculture and manufacturing.

Delphian Detection Technology designs and manufactures infrared and catalytic combustible gas sensors and monitors. The sensors detect a number of combustible gases, including ethers, alcohol, hydrocarbons (methan, propane, butane, hexane, heptane, turpentine, acetylene, gasoline) cyclic compounds, ketones, and inorganic gases (carbon monoxide, hydrogen sulfide, ammonia, and hydrogen). The company's gas sensors are used in chemical plants, offshore drilling rigs, gas storage facilities, pipelines, sewage treatment plants, hospital sterilizing rooms, boiler rooms, and drying ovens.

Fastenal distributes three combustible gas sensor models manufactured by Mine Safety Appliance. All the sensors are replacement style and feature a range of 0-100 percent.

Net Safety Monitoring Inc. produces combustible gas detection products including catalytic bead and infrared combustible gas sensors. Both sensor types are compact and explosion proof, with the infrared sensors able to detect 0 to 100 percent LEL. The catalytic sensors feature a modular design and are for use with 12 or 24 VDC systems.

Pem-Tech Inc. manufactures microprocessor-based combustible gas detectors designed with catalytic bead and infrared sensing elements. Suitable for use in hazardous environments, the various sensors feature a measuring range of 0-100 percent LEL and a 4-20mA analog signal.

Safety Systems Technology engineers and manufactures combustible gas sensors that detect methane, propane, butane, ethane, pentane, LNG, LPG, and hydrogen. The sensors utilize either catalytic or infrared methods of detection and feature a standard 4-20 milliamp circuit. The sensors are available in standard, weatherproof, and dust-proof models.

Sierra Monitor Corp. produces 4-20mA combustible gas sensors that employ catalytic bead, electrochemical, semiconductor, and infrared technologies. The sensors feature an output range 0-100 percent LEL, along with stainless steel 316 or epoxy-coated aluminum enclosures.

Figaro USA Inc. manufactures combustible gas sensors that detect LP-gas/propane, natural gas/methane, general combustible gas, and hydrogen. The various sensors feature measuring ranges of 500-10000ppm or 50-1000 pm. The company also produces combustible/toxic gas sensors that detect methane and carbon monoxide.

Lab Safety Supply distributes a hand held combustible gas sensor with the ability to detect up to 18 different combustible gases including acetone, alcohol, ammonia, benzene, butane, ethylene oxide, gasoline, halon, hydrogen sulfide, industrial solvents, jet fuel, lacquer thinner, methane, naphtha, natural gas, propane, refrigerants, and toluene.

Pololu Corp. manufactures semiconductor gas sensors that detect combustible gas from 100 to 10,000 ppm. The sensors can operate at temperature from -10 to 50 C and consume less than 150mA at 5V.

RIDGID engineers combustible gas sensors that detect methane, propane, butane, ethanol, ammonia, and hydrogen. Featuring Tri-Mode detection, the sensors feature a detection range of 0 to 6400 ppm and alarm sensitivity of 40 ppm.