Abstract: A device for providing a plurality of indications of a select pressure, said device including: an electronic interface having an input and an output; a resistive structure adapted to measure the select pressure and being electrically coupled to the input of the electronic interface; a first output for providing a signal indicative of the select pressure, the first output being electrically coupled to the output of the electronic interface; and, a comparator coupled to the output of the electronic interface and being adapted to provide a signal indicative of whether the select pressure is greater than a predetermined threshold.

Abstract: A device for providing a plurality of indications of a select pressure, said device including: an electronic interface having an input and an output; a resistive structure adapted to measure the select pressure and being electrically coupled to the input of the electronic interface; a first output for providing a signal indicative of the select pressure, the first output being electrically coupled to the output of the electronic interface; and, a comparator coupled to the output of the electronic interface and being adapted to provide a signal indicative of whether the select pressure is greater than a predetermined threshold.

Abstract: A pressure transducer employing a metal isolation diaphragm. A volume of oil is located between the metal diaphragm and a silicon sensor received in a base member. In order to reduce errors at very low pressure caused by the oil exerting a tension on the deflecting portion of said silicon sensor, the metal diaphragm has an extending dome or dimple above the location of the silicon sensor. The silicon sensor is also recessed below the supporting base plate so that the separation between the silicon sensor and the metal diaphragm increases. The base plate also contains a series of shallow, narrow concentric grooves which further reduces surface tension between the metal diaphragm and the base plate.

Abstract: A dynamic pressure sensor employing piezoelectric ceramic elements in a shear mode. The ceramic elements are bolted in a sandwich-like assembly which includes collector plates to a support member; a piezoelectric compensating assembly is also bolted to this support member. The sensor provides high sensitivity and is particularly insensitive to vibration, case strains and the like.