Measuring and testing – Liquid level or depth gauge – Immersible electrode type
Patent
1989-03-10
1990-05-15
Yasich, Daniel M.
Measuring and testing
Liquid level or depth gauge
Immersible electrode type
324690, 361284, G01F 2326, G01R 2726
Patent
active
049247026
ABSTRACT:
A capacitive sensor is constructed to eliminate electrical conduction through a liquid being measured. The electrical conduction in the liquid occurs between the plates of the reference and measuring capacitors. The capacitive plates which are spaced from the common capacitive plate to form the reference and measuring capacitors are of unitary construction and formed from anodized aluminum. The anodization forms an insulated surface which prevents conduction between the electrodes through the liquid. A ratio taken between the measuring capacitor and reference capacitor is therefore indicative of the level of the liquid within the gap of the measuring capacitor and is independent of the conductance of the liquid and its dielectric constant. Such a probe is particularly useful in applications where the liquid undergoes indeterminable changes in conductivity such as a lubricant which becomes contaminated by metallic particulates.
REFERENCES:
patent: 2699523 (1955-01-01), Meyers
patent: 2699523 (1955-01-01), Meyers
patent: 2754457 (1956-07-01), Meyers
patent: 2789435 (1957-04-01), Weiss
patent: 2919579 (1960-01-01), Gronner
patent: 2941403 (1960-06-01), Steefeld et al.
patent: 2943258 (1960-06-01), Shawhan
patent: 3114262 (1963-12-01), Atun
patent: 3192455 (1965-06-01), Bergeson
patent: 3219925 (1965-11-01), Borley et al.
patent: 3515000 (1970-06-01), Baumoel
patent: 3533286 (1970-10-01), Westcott et al.
patent: 3570003 (1971-03-01), West
patent: 4208909 (1980-06-01), Maltby et al.
patent: 4389900 (1983-06-01), Gutierrez
patent: 4528839 (1985-07-01), Blanchard et al.
patent: 4806847 (1989-02-01), Atherton et al.
Kavlico Corporation
Yasich Daniel M.
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