Pressure sensor

Details Pressure sensor Pressure sensor

1987-02-10

1988-11-01

Shaw, Clifford C.

Electrical resistors

Strain gauge type

Fluid- or gas pressure-actuated

338 5, 338 42, 338 47, G01L 122

Patent

active

047823194

ABSTRACT:
The sensor includes a rigid support and a diaphragm having a peripheral portion fixed by a layer of glue to the support. The central portion of the diaphragm is spaced from the support and, on its surface facing the support, carries at least one thick-film resistor acting as a piezo-resistive transducer. The diaphragm can deform resiliently towards the support when a pressure is exerted on its other surface. The surface of the support which is connected to the diaphragm is flat, and the layer of glue has a calibrated thickness such that the distance between the diaphragm and the surface of the support at rest is substantially equal to the deflection of the diaphragm corresponding to a predetermined maximum pressure measured.

REFERENCES:
patent: 3341794 (1967-09-01), Stedman
patent: 3455165 (1969-07-01), Hut
patent: 4382247 (1983-05-01), Stecher et al.

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