The plated housing contains a diaphragm, a calibration spring, a snap-acting switch with manual reset button, and a dpdt relay.
The sample connections located on each side of the diaphragm accept .25″ OD tubing via the integral compression ferrule and nut.
An enclosure cover guards against accidental contact with the live switch terminal screws and the set point adjusting screw. The enclosure cover will accept a 0.5″ conduit connection. The manual reset button is located on the top surface of the enclosure cover.