Patent ID: 8074911

Claim:
A liquid level sensing assembly for wirelessly transmitting a plurality of signals based on a changing level of wastewater in a tank to a first coil of a transceiver/controller of a grinder pump, said liquid level sensing assembly comprising: at least one liquid level sensor operable in response to the changing level of the wastewater in the tank; a second coil positionable adjacent to the first coil of the transceiver/controller of the grinder pump; a transponder for extracting electrical energy using said second coil in response to the first coil, said transponder operably connected to said at least one liquid level sensor and operable to wirelessly transmit from said second coil to the first coil said plurality of signals based on the state of the at least one liquid level sensor due to the changing level of the wastewater in the tank; and wherein said transponder is operable to wirelessly transmit a first signal from said second coil to turn on the grinder pump, operable to wirelessly transmit a second signal from said second coil to turn off the grinder pump, and operable to wirelessly transmit a third signal from said second coil to indicate a third level of the wastewater for activation of an alarm.