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The wattmeter is an instrument for measuring the electric active power (or the average of the rate of flow of electrical energy) in watts of any given circuit. Electromagnetic wattmeters are used for measurement of utility frequency and audio frequency power; other types are required for radio frequency measurements.
Dr Aron's pendulum meter, as sold in Great Britain by GEC, from 1888. One pendulum bob is labeled as "B". The meter could be used only for direct current. Hermann Aron's grave in Weissensee (Berlin) Hermann Aron (; 1 October 1845 – 29 August 1913) was a German researcher of electrical engineering. Specimen of Aron's pendulum meter
The Tweet-a-watt [13] is a hacked version of the standard Kill-A-Watt Plug in Power Meter. By piggybacking on the device's on-board LM2902N op-amp chip, the creator was able to get readings for voltage and current and transmit to a computer, which then sent this to Twitter via handle @tweetawatt. [ 14 ]
An electricity meter, electric meter, electrical meter, energy meter, or kilowatt-hour meter is a device that measures the amount of electric energy consumed by a residence, a business, or an electrically powered device over a time interval. Electric utilities use electric meters installed at customers' premises for billing and monitoring purposes.
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Power meter may refer to: Electricity meter measures electrical energy (electrical power supplied to a residence, business or machine over time) Wattmeter measures the electrical power circulating in any electric circuit; Microwave power meter measures power in a microwave signal; Optical power meter measures power in an optical signal
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