Filter circuit for a gaseous leak detector

Details Filter circuit for a gaseous leak detector Filter circuit for a gaseous leak detector

1994-02-02

1995-03-21

Hofsass, Jeffery A.

Communications: electrical

Condition responsive indicating system

Specific condition

324455, G08B 1710

Patent

active

054000157

ABSTRACT:
A circuit improvement and method leading to increased leak detection sensitivity is provided for gaseous leak detectors which utilize a hand held probe. The circuit modification provides a high pass filter and additional circuit gain which are switched together in or out of the detection circuit. When the modification is switched in circuit it is necessary to move the probe with a sweeping motion while searching for a gaseous leak.

REFERENCES:
patent: Re32552 (1987-06-01), Liebermann et al.
patent: 4228429 (1980-10-01), Tsuchiya et al.
patent: 4766763 (1988-08-01), Kurtz
patent: 4831332 (1989-05-01), Rudisill et al.
patent: 5264833 (1993-11-01), Jeffers et al.

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