Infrared detector 0/2000 ppm. Operating pressure 80KPa...110 KPa, maximum air speed <6m/s. Zero tracking and self-diagnosis. Calibration via plug-in tool. 4-20mA proportional signal output. Optional 3-relay board can be housed in the casing. Supply voltage 12V...24V DC. Maximum current draw 70mA @ 12V. Operating temperature -20°C...+50°C. IP65 protection rating. Die-cast aluminum housing. Dimensions (L x H x D) 106 x 170 x 65mm. EMC EN 50270:2011, EN 61000. Approval certificates: ATEX Exd II2G and Sil 1.