초록 ▼

A sensor can detect the difference in potential between itself and the fluid into which it is immersed, a signal generated by the probe representing this difference in potential. This signal is used to activate an oscillator circuit. By varying the conditions at which current in the oscillator circu

A sensor can detect the difference in potential between itself and the fluid into which it is immersed, a signal generated by the probe representing this difference in potential. This signal 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.

대표청구항 ▼

A detecting device for detecting a fluid, comprising: a probe for detecting an electrical potential between itself and said fluid; an output circuit in said probe, said output circuit producing an output signal when said electrical potential reaches a predetermined value; a printed circuit board, sa

A detecting device for detecting a fluid, comprising: a probe for detecting an electrical potential between itself and said fluid; an output circuit in said probe, said output circuit producing an output signal when said electrical potential reaches a predetermined value; a printed circuit board, said printed circuit board comprising a sensor pad area and a circuit area; said sensor pad area being responsive to a difference in potential between itself and said fluid; said sensor pad area sending a signal to said circuit area when said electrical potential reaches said predetermined amount; a potting material encapsulating said printed circuit board; and an additive added to said potting material.