Housed pressure switches are completely enclosed to avoid possible hazard from loose wires in exposed locations.
Terminal block pressure switches are housed and, in addition, are equipped with enclosed terminal blocks, thus eliminating the expense of buying and installing external junction boxes.
Explosion proof pressure switches are designed with heavy housings built to conform to accepted electrical standards in isolating the units from explosive atmosphere. All explosion proof models are equipped with terminal blocks for convenience in wiring.

pressure switch types
pressure switch honeywell
pressure switch diagram
adjustable pressure switch
pressure switch air compressor
water pressure switch
pressure switch well pump
air pressure switch