CROWCON Xgard Type 1

Introduction Xgard Type 1

Intrinsically safe toxic and oxygen gas detector

This version of Xgard is an Intrinsically safe loop-powered (current-sink) 4-20 mA toxic or oxygen gas detector, designed to detect a wide range of gases when fitted with the appropriate electrochemical sensor. The detector is certified II 1 G Ex ia IIC T4 Ga, and is suitable for use in Zone 0, Zone 1 and Zone 2 hazardous areas when used with a suitable Zener barrier or galvanic isolator. Electrical connections to the detector are made via the terminal block on the amplifier PCB shown below. The amplifier provides power to the sensor, and converts the sensor signal into a 4-20 mA signal for connection to a control panel.