Gas analyzer

Details Gas analyzer Gas analyzer

1976-04-29

1977-06-07

Scovronek, Joseph

Chemistry: physical processes

Physical processes

Crystallization

340180, 340188R, 340212, 340285, G01N 2716, G08B 2100

Patent

active

040280578

ABSTRACT:
A gas analyzer in which a catalytic resistance element creates an imbalance in a Wheatstone bridge and lights a number of successive light emitting diodes arranged in a color coded analog display which is rugged, stable and easily read under all light conditions, in proportion to the subject gas present. Erratic and confusing indications are eliminated by driving the bridge into negative imbalance during the warm-up period. Initial warm-up, testing of the battery and transition to the monitor function is accomplished by a single operating stroke of only one switch.

REFERENCES:
patent: 2899281 (1959-08-01), Olmer
patent: 3586486 (1971-06-01), Kim et al.
patent: 3877291 (1975-04-01), Hoppesch et al.
patent: 3943766 (1976-03-01), Delany

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