The Energy Detective

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The Energy Detective, also known as TED, is an energy demand feedback device that promotes energy conservation by making residential consumers aware of how much electrical energy is being used in their homes.

Essentially, TED is no different from the utility company power meter on the outside of a residence, but it is displayed indoors at a place where it can be conveniently read. The device comes in two parts - an electromagnetic transducer that sits at the power mains to measure the total power usage and transmits it over the power wiring, and a receiver device that receives the signal and displays it to the user.

TED tracks kilowatt-hours, and optionally computes cents per hour and estimates the month's electric bill.

A notable competitor to TED is the EV100 Energy Viewer, a wall-mounted power meter that fits in a single light-switch gangbox and displays the same information.