Method and apparatus for detecting water in oil

Details Method and apparatus for detecting water in oil Method and apparatus for detecting water in oil

1977-09-07

1978-12-12

Krawczewicz, Stanley T.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 96R, 210100, 210258, 210497R, 324 65R, 200 6105, B01D 1300

Patent

active

041295013

ABSTRACT:
A sheet of hydrophilic paper is laminated between two plate electrodes and immersed as a water sensor assembly in an electric power transformer oil charging flow stream. A low power and voltage d.c. potential is impressed across the plates as the oil flows through or around the sensor. Any water in the flow stream coming into contact with the paper is absorbed and retained thereby. Such water reduces the electrical resistance of the paper thereby causing current flow. The consequent current flow is used as a signal to initiate the operation of a series of relays which interrupt the power supply of a prior art filtration drive motor.

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patent: 2681571 (1954-06-01), Becher
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patent: 3458845 (1969-07-01), Thoma
patent: 3493484 (1970-02-01), Berg et al.
patent: 3522530 (1970-08-01), Muller
patent: 3800219 (1974-03-01), Fosberg
patent: 3916674 (1975-11-01), Miller et al.

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