Thermal flow sensor

Details Thermal flow sensor Thermal flow sensor

1992-03-19

1994-07-19

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

Thermal type

731182, G01F 168

Patent

active

053298128

ABSTRACT:
In a thermal flow sensor comprising a cylindrical housing, a straight-pipe-shaped detecting tube, and a heat-sensitive resistor provided in the detecting tube, the housing has a net at its one end opening through which fluid to be measured flows therein, and no net is provided at the other end opening. Instead, an insertion preventing member is provided downstream of the heat-sensitive resistor and inside the detecting tube to prevent the insertion of an unwanted object such as the finger into the detecting tube.

REFERENCES:
patent: 4210016 (1980-07-01), Peter et al.
patent: 4261199 (1981-04-01), Sauer
patent: 4304129 (1981-12-01), Kawai et al.
patent: 4412449 (1983-11-01), Eiermann et al.
patent: 4599895 (1986-07-01), Wiseman
patent: 4785662 (1988-11-01), Ohta et al.
patent: 4841781 (1989-06-01), Khaliga
patent: 4841938 (1989-06-01), Weibler et al.

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