Gas flow measuring apparatus

Details Gas flow measuring apparatus Gas flow measuring apparatus

1979-12-11

1981-07-07

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

Thermal type

G01F 168

Patent

active

042767733

ABSTRACT:
A gas flow measuring tube is provided in a duct through which gas to be measured is flown. In this gas flow measuring tube there are placed an electric heater and first and second temperature dependent resistors which are formed of resistance wires stretched across a plurality of respective insulator frames. A measuring circuit is provided for controlling electric power to be supplied to the electric heater in accordance with the resistance change of the temperature dependent resistors, and thereby measuring the amount of the flow of gas to be measured. The measured values are corrected in accordance with the temperature of the insulator frames.

REFERENCES:
patent: 3975951 (1976-08-01), Kohama et al.
patent: 4067233 (1978-01-01), Obayashi et al.
patent: 4089214 (1978-05-01), Egami et al.

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