Patent ID: 9122281
Filing Date: 2015-09-01
Classification: G01F,G05D

Abstract:
1. A device for controlling a DC device by sensing water comprising: a pair of conducting probes, the probes spatially retained with an intervening gap, the probes and gap configured to allow conduction of electricity between the probes when a voltage is applied across the probes and the gap is filled with a conducting fluid; a control driver; a rectifying control means for detecting a current passing between the probes and providing a direct current electrical control signal to the control driver; supply means for accepting AC electrical power and supplying DC electrical power to the control driver; wherein the control driver has a first condition when receiving a control signal from the rectifying control means, and a second condition when no control signal is received from the rectifying control means; and such that when the supply means is accepting AC power, and the probe gap is filled with a conducting fluid, the control driver does not deliver DC power to a control circuit in the first condition, and when the probe gap is not filled with a conducting fluid the control driver delivers power to the control circuit in the second condition.