Pressure sensor having a sealed water-resistant construction

Details Pressure sensor having a sealed water-resistant construction Pressure sensor having a sealed water-resistant construction

1993-06-23

1995-02-07

Chilcot, Jr., Richard E.

Measuring and testing

Fluid pressure gauge

With protective separator

73756, G01L 700

Patent

active

053867300

ABSTRACT:
A pressure sensor has a housing (1). The housing accommodates a pressure sensing element (2) and a wiring board (3). The wiring board incorporates a lead irame (14). The lead frame connects output terminals (21) of the sensing element with ends of connector pins (12). A pressure guide (4) has a pressure path (41) and a flange (44). The flange is inserted in an opening of the housing with the pressure path being airtightly connected to a pressure intake (22) extending from the sensing element and with an end face (4a) of the flange being spaced apart from the wiring board. Potting material (5) coats the sensing element, the wiring board, and the flange of the pressure guide in the housing. If the potting material peels off the flange, water may penetrate the peeled part and reach the end face of the flange. The water, however, never reaches the wiring board because the end face of the flange is spaced apart from the wiring board. Accordingly, the lead frame in the wiring board is free from water and no migration is caused.

REFERENCES:
patent: 4413527 (1983-11-01), Sugiura et al.
patent: 4500864 (1985-02-01), Nakane et al.
patent: 4516430 (1985-05-01), Kurtz et al.
patent: 4554927 (1985-11-01), Fussell
patent: 4770045 (1988-09-01), Nakagawa et al.
patent: 4829827 (1989-05-01), Wareham

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