DURÁN direx rs485 ip65 infrared co2 detector 0-2% v/v. 0-20000ppm, thermal compensation, linearisation and calibration parameter memory controls. plastic enclosure, rs485 addressable, 4-wire connection, compatible with durgas control panels, in parallel up to 16 detectors on the same loop, coverage 75m2 for co2, installation height 75/100 cm from the floor