Temperature history indicatiang label

Details Temperature history indicatiang label Temperature history indicatiang label

1988-10-24

1990-05-29

Yasich, Daniel M.

Thermal measuring and testing

Temperature measurement

Composite temperature-related paramenter

368114, 374188, G01K 304, G04F 1304

Patent

active

049290908

ABSTRACT:
A temperature indicating label includes a rectangular, insulative panel scribed on its faces with intersecting grooves in which electrodes of a galvanic reaction are bedded. One of the electrode sets is consumed in the course of electrolytic reaction and when consumed will expose the electrolyte admixed with a dye. A switching circuit selectively steps in sequence across the consummable electrodes while another portion of the circuit selects the other electrodes in accordance with temperature.

REFERENCES:
patent: 3638495 (1972-02-01), Sessler
patent: 4277974 (1981-07-01), Karr et al.
patent: 4607962 (1986-08-01), Nagao et al.
patent: 4746223 (1988-05-01), Miyata et al.
patent: 4804275 (1989-02-01), Kang et al.

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