Direct-heated flow measuring apparatus having film resistor

Details Direct-heated flow measuring apparatus having film resistor Direct-heated flow measuring apparatus having film resistor

1986-02-19

1987-08-25

Myracle, Jerry W.

Measuring and testing

Volume or rate of flow

Thermal type

731182, G01M 1500

Patent

active

046884254

ABSTRACT:
In a direct-heated flow measuring apparatus including an electric heater of a film resistor type and a temperature-detecting resistor for detecting the temperature within a passage, the flow rate thereof is measured by a sensing circuit. The temperatures of the electric heater and the temperature of the temperature-detecting resistor are compared. The measuring operation of the sensing circuit is stopped when the temperature within the passage is abnormal as indicated by this comparison.

REFERENCES:
patent: 4279146 (1981-07-01), Wessel et al.

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