Method of sensing fluid flow and level employing a heated extend

Details Method of sensing fluid flow and level employing a heated extend Method of sensing fluid flow and level employing a heated extend

1992-08-19

1993-04-13

Will, Thomas B.

Measuring and testing

Liquid level or depth gauge

Thermal type

73304R, 338 22R, 338 24, G01F 2324

Patent

active

052012239

ABSTRACT:
An extended resistance temperature sensor formed of a plurality of lengths of pre-insulated resistance temperature detector (RTD) wire. The RTD wire is either unheated, self heated or is heated by means of strands of heater wire integrated with or placed closely adjacent to the RTD wire. The RTD wire itself, or together with the heater wire, is bonded together in one embodiment. Alternatively the RTD wire, or with the heater wire, may be encased in insulated shrink tubing, thin wall metal tubing or both. Connectors are provided to supply electrical current for heating purposes or to connect the RTD wire to detection circuitry, or both. Protective sheaths are provided over the connectors.

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