Resistive fluid detecting means

Details Resistive fluid detecting means Resistive fluid detecting means

1975-10-02

1977-05-31

Hohauser, Herman J.

Electrical transmission or interconnection systems

Switching systems

Condition responsive

73304R, 137392, 340244R, G01F 2300

Patent

active

040271722

ABSTRACT:
A resistive fluid detecting means utilizes a probe means having three electrically conductive areas that are interconnected between a power source and an amplifier. The detecting means is particularly useful in detecting the presence or absence of water in a boiler used in a heating plant. The presence of water between two of the electrically conductive areas reduces the resistance of that path so that the amplifier responds and operates an output switch, which in turn can be used to energize a fuel burner for the boiler. If boiler scale builds up on the probe means or if the water or fluid rises too high, the electrically conductive areas shunt current away from the amplifier and allow the output switch to open.

REFERENCES:
patent: 3119266 (1964-01-01), Atkinson

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