Temperature compensated flow sensor

Details Temperature compensated flow sensor Temperature compensated flow sensor

1982-12-27

1984-10-09

Goldberg, Gerald

Measuring and testing

Volume or rate of flow

Using differential pressure

7386101, 340606, G01F 124

Patent

active

044754078

ABSTRACT:
A temperature compensated flow sensor (10) for monitoring oil flow to a two-cycle engine includes a magnetic flow sensing body (26) mounted in a flow sensing bore (21). The position of the flow sensing body is detected by a Hall switch (42) to provide an electrical output indicating a flow or a no flow condition. The flow sensing body (26) is biased toward the Hall switch (42) by a spring (27) and a spring follower (31) controls the spring rate as a function of temperature. A thermal power element (35) moves the spring follower as a function of temperature to compensate for the change of oil viscosity with temperature.

REFERENCES:
patent: 2372166 (1945-03-01), McCarty
patent: 3510816 (1970-05-01), Bagg
patent: 3910112 (1975-10-01), Gerlach
patent: 4166936 (1979-09-01), Tice
patent: 4181835 (1980-01-01), Stadler et al.
patent: 4213021 (1980-07-01), Alexander
patent: 4336903 (1982-06-01), Zirps

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