Method of evacuating a single fluid in an enclosure containing a

Details Method of evacuating a single fluid in an enclosure containing a Method of evacuating a single fluid in an enclosure containing a

1995-10-19

1996-10-15

Thorpe, Timothy S.

Pumps

Condition responsive control of pump drive motor

With plural separate drive motor controlling elements

73 6143, F04B 4900

Patent

active

055649041

ABSTRACT:
A sensor can detect the difference in potential between a probe and the fluid into which it is immersed, and a signal generated by the probe representing this difference in potential is used to activate an oscillator circuit. By varying the conditions at which current in the oscillator circuit begins to oscillate, various liquids can be detected and identified.

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