"“PPS” Make Hydro-Carbon gas detector. Model: gaZsens Ex Sensor type: Catalytic Bead Pellistor Type. Range: 0-100 %LEL. Sensor housing: Exd IIC . Weather protection: IP 55. Sensor enclosure: SS316. Transmitter: 3 wire 4-20mA (non-Isolated)signal output. Transmitter enclosure: Aluminium Die-Cast Exd type IIA/IIB or IIC T6 IP65/66. Calibrated for Methane, HC Gases OR HYDROGEN GAS Sensor Life: App. 3-4 years in fresh air. Operating temp:-10 to +55 Deg C. Accessaries : Cable Gland 3/4""ET Exd. Certification: Sensor Housing & Transmitter Enclosure both are CIMFR TESTED, BIS APPROVED & PESO CERTIFIED."