Compact differential pressure transmitter having first and secon

Details Compact differential pressure transmitter having first and secon Compact differential pressure transmitter having first and secon

1993-04-19

1996-07-02

Chilcot, Richard

Measuring and testing

Fluid pressure gauge

With protective separator

73716, 73720, 73721, G01L 708

Patent

active

055311202

ABSTRACT:
A differential pressure transmitter detects a differential pressure condition of a fluid by means of a semiconductor sensor. First and second seal diaphragms are provided in a member which constitutes the differential pressure transmitter, to form first and second pressure receiving chambers. An overload protection diaphragm and first and second damper chambers are provided at positions close to the first and second pressure receiving chambers. Also, there are provided a passage for connecting the first pressure receiving chamber and the first damper chamber, a passage for connecting the second pressure receiving chamber and the second damper chamber, and passages for connecting the first and second damper chambers respectively with the semiconductor sensor. Even when a change is caused in the temperature of a processed fluid to be detected, the differential pressure transmitter quickly detects the temperature change, so that a differential pressure of the processed fluid can be measured with high accuracy.

REFERENCES:
patent: 4135408 (1979-01-01), Di Giovanni
patent: 4364276 (1982-12-01), Shimazoe et al.
patent: 4466290 (1984-08-01), Frick
patent: 5036884 (1991-08-01), Miller et al.
patent: 5094109 (1992-03-01), Dean et al.

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