Flow sensor having an intermediate heater between two temperatur

Details Flow sensor having an intermediate heater between two temperatur Flow sensor having an intermediate heater between two temperatur

1997-06-12

1998-12-22

Dougherty, Elizabeth L.

Measuring and testing

Volume or rate of flow

Thermal type

G01F 168

Patent

active

058522395

ABSTRACT:
A flow sensor includes a first heating portion, provided at a first position in a flow of a fluid, which heats the fluid and outputs a voltage in response to a temperature of the first position. A second heating portion, provided at a second, downstream position in the flow of the fluid, heats the fluid and outputs a voltage in response to a temperature of the second position, the first position and the second position being spaced from each other in a direction parallel to the flow of the fluid. An intermediate heater, provided between the first heating portion and the second heating portion, heats the fluid at an intermediate position between the first position and the second position.

REFERENCES:
patent: 4651564 (1987-03-01), Johnson et al.
patent: 5291781 (1994-03-01), Nagata et al.

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