"PPS Make OXYGEN Gas Detector Model: gaZsens Oxi, Sensor type: Electrochemical Type. Range: 0 - 25 % V/V Sensor housing: Exd IIC T4 IP55, Enclosure: SS316. Transmitter: 3 wire 4-20 mA (non-Isolated) signal output. Transmitter enclosure: Aluminium Die-cast Exd type - Exd IIA/IIB or IIC T6 IP 65/66 Calibrated for Oxygen Using Zero Grade N2 & Oxygen Gas Features: Contacts with RED LED on PCB for Alarms & fault Display: Alphanumeric LCD Digital Type Display, Signal Output: RS 485, 3 Nos. Potenital Free Relay Contacts for AL1, AL2 & FLT Parameter Controls: Non-intrusive calibra tion via Magnetic STick, Sensor Life: App. 2 years in fresh air Operating temp:-10 to +55 Deg C Acces sories : Cable Glands 3/4""ET Exd. Approval: Sensor Housing & Transmitter Enclosure:CIMFR tested, BIS Approved & PESO Certified "