Title: Calorimetric apparatus

Abstract: A calorimetric apparatus for determining the calorific content of a fuel gas uses a reactor for producing oxidation of the fuel gas and a combustion gas in the presence of a catalytic oxidizer. The oxidizer is heated by a constant current supply to a catalytic oxidation temperature. The resistance of the catalytic device is measured before and during the oxidation reaction which produces an additional heating of the catalytic device. The change in resistance is used to control a valve arranged to determine the flow rate of the fuel gas to the reactor. A display control signal is derived from a valve control signal and used to control a display for indicating the calorific content of the fuel gas.

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Inventors: Maeda, Shosaku (Atsugi, JP)

Application Number: 06/208135
Filing Date: 1980-11-19
Publication_date: 1982-05-18
Assignee: HONEYWELL INC

Primary Class(es): 374/37 374/33, 422/95, 422/51
Other Classes: G01N25/30; G01N25/20; G01N17/00; G01N25/30
US Patent Ref:

2197370	April, 1940	Sullivan	73/190
3777562	December, 1973	Clingman, Jr.	73/190

Other Refs:
Primary Examiner: Goldstein, Herbert
Assistant Examiner:
Attorney: Marhoefer, Laurence J.
Burton, Lockwood D.
Halista, Mitchell J.