Detects O2, CO2, toxic and refrigerant gases 4-20 mA output analog transmitter with optional backlit display Plug-in and pre-calibrated sensors Available with electrochemical, infrared or semi-conductor sensors More than 30 different sensors are available to detect most toxic gases in the industry Available in an infrared version for CO2 EN14624 compliant with regards to R134a monitoring Oxygen detector for commercial or industrial applications in unclassified areas