The infrared sensor provides detection of explosive gases (methane, butane, propane, ethylene, hexane, etc.) in more severe environmental conditions, where the presence of poisons could harm the use of a catalytic cell. It also detects methane from 0 to 100% volume for biogas applications. CO2 can be monitored as well in different ranges.
The can detect and display up to two gases on certain models. Both gas sensors may be mounted directly to the transmitter, or may be mounted remotely.