Differential pressure transmitter

Details Differential pressure transmitter Differential pressure transmitter

1985-04-01

1986-08-19

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Diaphragm

73728, 338 32H, 338 42, G01L 708, G01L 914, H01L 4306

Patent

active

046062297

ABSTRACT:
A differential pressure transmitter includes a housing, a first chamber within the housing for receiving an input pressure to be sensed and a second chamber for receiving a transmitter adapted to generate an electrical signal representative of the input pressure. The chambers are separated by a continuously formed, highly resilient diaphragm. A reaction member embodied as a resilient spring is disposed in the second chamber for sensing a position of the diaphragm resulting from the magnitude of the differential pressure thereacross. The reaction member has a magnetized structure mounted thereon which coacts with a Hall effect transducer embodied in the transmitter for detecting the relative position of the magnetized structure and therefore of the diaphragm and responsively generating an electrical signal. The signal may be utilized for positioning actuator controlled dampers within a VAV system duct.

REFERENCES:
patent: 3956920 (1976-05-01), Kollmeyer
patent: 4352085 (1982-09-01), Herden
patent: 4484173 (1984-11-01), Everett
patent: 4512199 (1985-04-01), Woodward

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