HYDROGEN (H₂) SENSOR
GUIDE SPECIFICATION

Provide a Model Tox-H₂/ANA Hydrogen (H₂) sensor(s) with a range of 10 to 2000 PPM (parts per million) and an analog output of 4 to 20 mA over its range. The sensor shall be housed in an explosion proof housing and have explosion proof conduit connections to the housing to maintain system integrity. The sensing element shall be electrochemical and have a life of one to three years. The sensor response time shall reach 90% of level being sensed in 65 seconds. The sensors shall be powered by low voltage and have a self check capability and an LED to indicate sensor "okay". If the sensor fails, its output shall drop to zero to signal the controller of failed condition. The sensor shall be as manufactured by Toxalert International, Inc.