This switchbox is an Ex ia (intrinsically safe) unit fitted with two NAMUR-type proximity switches, used to signal valve or actuator position (typically open and closed) back to a control system. Ex ia certification means the circuit is designed to be incapable of releasing enough energy to ignite a hazardous atmosphere under normal or fault conditions, making it suitable for zoned hazardous areas without needing a flameproof enclosure.

This exact unit is marked as discontinued by its manufacturer, and the manufacturer identity is not recorded against this listing, so we have not sourced a current datasheet. Supplied by Z&F Corporation — our technical sales team can help identify a current equivalent switchbox if you need a replacement.