Thermal flowmeter

Details Thermal flowmeter Thermal flowmeter

1979-08-23

1981-01-20

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

Thermal type

G01F 168

Patent

active

042455030

ABSTRACT:
A length of conduit is coupled at its ends to a heat sink. A pair of thermocouples are joined to the conduit at spaced points intermediate the ends of the conduit. A conductive post is connected at one of its ends to the heat sink and its other end is joined to a location on the conduit, midway between the thermocouples, by conductive material having a higher electrical resistance than both of the joined elements. A coil arrangement is associated with the post and is energized to cause heating current to pass through the post, the high resistance conductive material and the conduit. The heat generated by the flow of heating current is concentrated at the midpoint between the thermocouples. The thermocouples produce outputs representative of the flow of fluid through the conduit.

REFERENCES:
patent: 2594618 (1952-04-01), Booth, Jr.
patent: 2896452 (1959-07-01), Cogniat et al.
patent: 3181357 (1965-05-01), Benson
patent: 3246523 (1966-04-01), Richard

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