Measuring and testing – Gas analysis – Moisture content or vapor pressure
Patent
1977-06-13
1978-10-17
Goldstein, Herbert
Measuring and testing
Gas analysis
Moisture content or vapor pressure
G01J 552, G01J 562
Patent
active
041202007
ABSTRACT:
The invention relates to a method and apparatus for measuring the temperature of an object within a temperature range of between about 100.degree. C and about 2700.degree. C by deriving a signal indicative of the temperature of the object from the total radiation within a limited wavelength range extending from about 8 to about 14 microns. In one form of the invention, a device is provided which includes a radiation detector, a reference member, a temperature control device for automatically maintaining the temperature of the reference member at a substantially constant value, a device for alternately directing radiation from the object and from the reference through a filter to the radiation detector, a signal processing system for receiving signals from the radiation detector and outputting a signal indicative of the temperature of the object, responsive to the difference between the radiation detected from the object and from the reference member.
REFERENCES:
patent: 2512257 (1950-06-01), Pfund
patent: 2964427 (1960-12-01), Rheinberger et al.
patent: 2976730 (1961-03-01), Howell
patent: 3091693 (1963-05-01), Rudomanski et al.
patent: 3105906 (1963-10-01), Schultz et al.
patent: 3363457 (1968-01-01), Ruehle et al.
patent: 3489008 (1970-01-01), Thornton
patent: 3916690 (1975-11-01), Brandli
Bodenseewerk Perkin-Elmer & Co. GmbH
Crane John D.
Giarratana Salvatore A.
Goldstein Herbert
Masselle Francis L.
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