Flame ionization detector status indicator

Details Flame ionization detector status indicator Flame ionization detector status indicator

1975-03-07

1976-03-16

Woodiel, Donald O.

Measuring and testing

Gas analysis

Moisture content or vapor pressure

23254E, 73343R, G01K 702

Patent

active

039437663

ABSTRACT:
Thermocouples are disposed in the flame exhaust passage and exteriorly on the housing of each ionization detector to monitor the flame status thereof within an environment of widely varying temperature. A temperature differential signal is derived from the thermocouples of each ionization detector, with each temperature differential signal being compared to a common threshold level at which an indication of a flameout condition occurs. The indication of a flameout condition in each ionization detector is varied relative to the temperature differential thereof through a variable gain amplification stage. Switches are disposed for individually interrupting each temperature differential signal and flameout conditions occurring in any one or more of the ionization detectors are identifiable therewith.

REFERENCES:
patent: 2385530 (1945-09-01), Paille

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