Bi-directional Differential Pressure Transducer

The diaphragm of a bidirectional pressure transducer can move in two different directions, enabling the sensor to measure both positive and negative pressure. In other words, a bi-directional differential pressure transducer is a differential pressure transducer which allows the greater input pressure to be applied to either port.

Bidirectional transducers are often used in room pressurization applications. Hospital operating rooms, isolation rooms, pharmacies, vivariums, and other critical environments need to maintain differential pressure in either direction to maintain patient health or otherwise keep an area free of contamination. Positively pressured areas keep outside contaminants out and negatively pressured areas keep inside contaminants in. In either case, during installation the high port of the transducer is always connected to the room being controlled and the low port connected to an outside reference, such as the adjacent corridor.