Two-input pyrometer

Details Two-input pyrometer Two-input pyrometer

1975-01-30

1976-11-23

Goldstein, Herbert

Measuring and testing

Gas analysis

Moisture content or vapor pressure

356 45, G01J 530, G01J 560

Patent

active

039929434

ABSTRACT:
Two photoelements with inputs for different wave lengths of radiation from a common source are serially connected individually to the inputs of high gain inverting amplifiers with feedback to adjust the voltage across the photoelement to zero, so that the outputs of the amplifiers are proportional to the short circuit currents through the photoelements. An algebraic calculating circuit forms the ratio of the outputs of the amplifier and provides for indication and/or control. The effectiveness of this ratio output is controlled in dependence upon proper orientation to the radiation emitting source.

REFERENCES:
patent: 3303340 (1967-02-01), Hewett et al.
patent: 3435237 (1969-03-01), Collins
patent: 3526135 (1970-09-01), Wortz
patent: 3654809 (1972-04-01), Worden et al.
patent: 3672217 (1972-06-01), Naya et al.
patent: 3715922 (1973-02-01), Menge
patent: 3766781 (1973-10-01), Roberts
patent: 3777568 (1973-12-01), Risgin et al.
patent: 3849000 (1974-11-01), Soardo et al.

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