Patent ID: 6961665

Claim:
A level measurement system, said level measurement system being powered by a two wire loop, said level measurement system comprising: (a) a transducer for emitting energy pulses and detecting reflected energy pulses; (b) a controller having a component for controlling said transducer, and a component for determining a level measurement based on the time of flight of said reflected energy pulse; (c) a power supply having an input port for receiving power from the loop, and a component for producing an output voltage; (d) a power management unit coupled to the loop, said power management unit having an output coupled to a storage capacitor for charging said storage capacitor, an input port for receiving excess power from the loop, a control terminal responsive to a control output from said controller for controlling the charging of said storage capacitor; (e) said transducer including an input for receiving energy from said storage capacitor under the control of said controller.