Sensing apparatus

Details Sensing apparatus Sensing apparatus

1985-01-31

1986-08-05

Frankfort, Charles

Measuring and testing

Liquid level or depth gauge

Immersible electrode type

340620, 361284, G01F 2326

Patent

active

046035818

ABSTRACT:
A sensing apparatus including: a first electrode member; a second electrode member arranged at opposing positions a predetermined distance away and electrically isolated from the first electrode member; and an electric circuit connected to the first and second electrode members. The first and the second electrode members are operatively connected by an impedance formed between the first and the second electrode members in response to existence of a substance to be sensed between the first and the second electrode members. The electric circuit outputs a signal in response to the impedance. The sensing apparatus is applicable for detecting, for example, the level of a liquid in a vessel.

REFERENCES:
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patent: 2996915 (1961-08-01), Greenwood et al.
patent: 3553575 (1971-01-01), Shea
patent: 3986110 (1976-10-01), Overall et al.
patent: 4092860 (1978-07-01), Arts et al.
patent: 4099167 (1978-07-01), Pomerantz et al.
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patent: 4145927 (1979-03-01), Larson
patent: 4201085 (1980-05-01), Larson
patent: 4295370 (1981-10-01), Bristol
patent: 4316158 (1982-02-01), Akita et al.
patent: 4479116 (1984-10-01), Kobayashi

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