Microprocessor based analog gas transmitter with 4 – 20 mA output signal for monitoring the ambient air and detecting flammable gases and vapours in the lower
explosion level (LEL) by means of a catalytic sensor (pellistor). The calibration for types without LCD display is possible via the handheld calibration keypad XT.S/CKD. The types with LCD display have a non intrusive magnetic calibration feature for easy calibration without opening the instrument and declassifying the area. The gas transmitter is available with EEx-d protection for Ex zone 1 and 2, or with EEx-n protection for Ex zone 2.