Thermal air flow meter

Details Thermal air flow meter Thermal air flow meter

1984-03-01

1985-12-24

Goldstein, Herbert

Measuring and testing

Simulating operating condition

Marine

73204, G01F 168

Patent

active

045598142

ABSTRACT:
A thermal air flow meter is equipped with a flow rate detector utilizing the phenomenon that heat is carried away in proportion to flow rate. The flow rate detector comprises a support, a heat-sensitive resistor formed on the support and leads attached to both ends of the support. To make the temperature distribution uniform, the heat-sensitive resistor is formed in such a manner that the resistance per unit length of the heat-sensitive resistor at either end of the support is greater than the resistance per unit length of the heat-sensitive resistor at the center of the support. This arrangement can provide a thermal air flow meter which has a rapid response to changes in flow rate.

REFERENCES:
patent: 2838639 (1958-06-01), Planer et al.
patent: 3747577 (1973-07-01), Mauch et al.
patent: 4264964 (1981-04-01), Nishimura et al.
patent: 4304128 (1981-12-01), Hafner
patent: 4369656 (1983-01-01), Ueno et al.
patent: 4393697 (1983-07-01), Sato et al.

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