Liquid level detector and alarm device for drip infusion sets

Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...

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A61M 100

Patent

active

057049238

ABSTRACT:
A liquid level detector and alarm device including an electrical bridge consisting of two infrared detectors for detecting the change of the liquid level of the infusion solution of a drip infusion set, an A/D converter, and a single chip microprocessor connected to the electrical bridge through the A/D converter and controlled by the electrical bridge to drive a buzzer when the liquid level drops below a predetermined value.

REFERENCES:
patent: 3588859 (1971-06-01), Petree
patent: 3605741 (1971-09-01), Spencer
patent: 4223231 (1980-09-01), Sugiyama
patent: 4532936 (1985-08-01), LeVeen et al.
patent: 4820281 (1989-04-01), Lawler, Jr.
patent: 5186057 (1993-02-01), Everhart
patent: 5267978 (1993-12-01), Dirr, Jr.
patent: 5346466 (1994-09-01), Yerlilkay et al.

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