Media isolated differential pressure sensor and fluid injection

Details Media isolated differential pressure sensor and fluid injection Media isolated differential pressure sensor and fluid injection

1996-07-31

1998-04-21

Oen, William L.

Measuring and testing

Fluid pressure gauge

With protective separator

G01L 700

Patent

active

057419752

ABSTRACT:
A pressure sensor (10) includes a base (12) supporting a lead frame (28) having a pressure sensing element (14) electrically coupled to the lead frame (28). The molded base (12) interlocks with first and second diaphragm mounting frames (18, 20) and together with first and second diaphragms (22, 24) forms first and second chambers (36, 40). An incompressible fluid resides in the first and second chambers (36, 40) and transfers the pressure of a sensed media impinging on either of the first or second diaphragms (22, 24) to the pressure sensing element (14). The incompressible fluid filling the first and second chambers (36, 40), together with the flexible and impermeable membrane material of the first and second diaphragms (22, 24) effectively isolates the pressure sensing element (14) from the sensed media.

REFERENCES:
patent: 4370890 (1983-02-01), Frick
patent: 4414851 (1983-11-01), Maglic
patent: 4425799 (1984-01-01), Park
patent: 4610256 (1986-09-01), Wallace
patent: 4697643 (1987-10-01), Sassier
patent: 4732042 (1988-03-01), Adams
patent: 4798089 (1989-01-01), Frick et al.
patent: 4833922 (1989-05-01), Frick et al.
patent: 4995266 (1991-02-01), Tobita et al.
patent: 5335549 (1994-08-01), Kato

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