PSI manufactures three series of pressure switches to serve your needs. PSI'ls line of pressure switches is diverse enough to meet your differential, vacuum, pneumatic and hazardous locations requirements. PSI prides itself on being made in the USA.

The Integra Series 575 is a two wire, 4 to 20mA pressure transmitter offering superb chemical and corrosion resistance. Gauge or absolute pressure is detected using a 4 active arm strain gauge bridge sensor, fused to a high purity ceramic diaphragm. Available in 3 classes of accuracy and thermal compensation.

290 Series transmitters measure density as a function of differential pressure. Each unit has two pressure sensitive diaphragms, each of which are located at a known elevation in the tank. Under normal operation both diaphragms will be submerged, and since the distance between them is fixed, any variation in the pressure differential between them must be a function of the liquid density.