Freeze and water detector for a fire hydrant

Details Freeze and water detector for a fire hydrant Freeze and water detector for a fire hydrant

G - Physics

08

B

G08B 19/02 (2006.01) E03B 7/10 (2006.01) E03B 7/12 (2006.01) E03B 9/14 (2006.01)

Patent

CA 2154433

Disclosed is an improved freeze and water detector for use in detecting frost or freezing temperatures and water accumulation in the lower part of a fire hydrant. This detector has a sensor which includes a float and magnet combination, a thermostat and an electrical circuit to indicate the presence of water and near-freezing temperatures inside the fire hydrant. The detector also has a visual indicator mounted in a casing on the exterior of the fire hydrant. This casing is mounted in a replacement cap that is substituted for one of the existing caps on the fire hydrant. The detector may include a passive microphone, connected to an audio output jack which is installed inside the casing, to listen to leaks in the underground water supply.

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