Apparatus and method for detecting liquid penetration by a conta

Details Apparatus and method for detecting liquid penetration by a conta Apparatus and method for detecting liquid penetration by a conta

1987-07-29

1988-12-27

Marcus, Michael S.

Chemistry: analytical and immunological testing

Automated chemical analysis

With aspirator of claimed structure

7386301, 422 63, 422 64, 422 65, 422 67, 422100, 436 49, 436180, G01N 3500

Patent

active

047940859

ABSTRACT:
Apparatus and a method are described which permit the detection of penetration of liquid by an apertured container used for aspirating and dispensing the liquid. The apparatus and method feature control means for advancing the container an increment of the maximum possible distance to the liquid; generating a pressure differential within the dispensing container that is sufficient to generate a signal that is indicative of whether the container aperture is closed by the liquid; detecting and signalling the pressure produced within the container by such a pressure differential; and comparing such signalled pressure against a reference value determinative of whether the container has penetrated the liquid.

REFERENCES:
patent: 3754444 (1973-08-01), Ure et al.
patent: 3894438 (1975-07-01), Ginsberg
patent: 3992158 (1976-11-01), Przybylowicz et al.
patent: 4041995 (1977-08-01), Columbus
patent: 4053381 (1977-10-01), Hamblen et al.
patent: 4258001 (1981-03-01), Pierce et al.
patent: 4287155 (1981-09-01), Tersteeg et al.
patent: 4340390 (1982-07-01), Collins et al.

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