A catalytic oxidation (Ex) sensor provides fast, accurate and specific responses to the gas of concern. The gas concentration is continuously indicated by an LED digital display which is visible through the window of the explosion-proof enclosure. Two on-board fail-safe relays trip when the user-selected gas concentrations are exceeded. The electronics converts the sensor signal into a 4 to 20mA signal for transmission to the controller, a distributed control system (DCS) programmable logic controller (PLC) or other types of centralized control stations.
Airtest Technologies, Inc., 1520 Cliveden Avenue, Unit 9, Delta, BC V3M 6J8. Tel: 604-517-3888; Fax: 604-517-3900.