Differential pressure transmitter having symmetrical constructio

Details Differential pressure transmitter having symmetrical constructio Differential pressure transmitter having symmetrical constructio

1996-02-14

1997-04-15

Chilcot, Richard

Measuring and testing

Fluid pressure gauge

With protective separator

7386147, G01L 708, G01F 138

Patent

active

056211759

ABSTRACT:
A differential pressure transmitter for detecting a difference between a pressure of a first detection fluid in a first pressure-receiving chamber and a pressure of a second detection fluid in a second pressure-receiving chamber, including a first diaphragm for sealing the first detection fluid, a second diaphragm for sealing the second detection fluid which is installed almost in parallel to the first diaphragm, a first isolation chamber communicated to the first pressure-receiving chamber, a second isolation chamber communicated to the second pressure-receiving chamber, a third diaphragm installed between the first and the second chambers and in a direction different from those of the first and second diaphragms, and a differential pressure detection sensor installed on and connected to at least one of the first and the second isolation chambers. The differential pressure transmitter having a symmetrical construction has a high sensitivity because difference between transmitting coefficients in pressure transmitting paths in high and low pressures is minimized.

REFERENCES:
patent: 3999435 (1976-12-01), Siegel
patent: 4135407 (1979-01-01), Ezekiel
patent: 4173149 (1979-11-01), Critten et al.
patent: 4466290 (1984-08-01), Frick
patent: 4833922 (1989-05-01), Frick et al.
patent: 4986127 (1991-01-01), Shimada et al.

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