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2. Voltmeter - Wikipedia

   en.wikipedia.org/wiki/Voltmeter

   Digital voltmeters give a numerical display of voltage by use of an analog-to-digital converter. Voltmeters are made in a wide range of styles, some separately powered (e.g. by battery), and others powered by the measured voltage source itself. Instruments permanently mounted in a panel are used to monitor generators or other fixed apparatus.

3. Ammeter - Wikipedia

   en.wikipedia.org/wiki/Ammeter

   The moving-iron meter was invented by Austrian engineer Friedrich Drexler in 1884. [5] This type of meter responds to both direct and alternating currents (as opposed to the moving-coil ammeter, which works on direct current only). The iron element consists of a moving vane attached to a pointer, and a fixed vane, surrounded by a coil.

4. Electricity meter - Wikipedia

   en.wikipedia.org/wiki/Electricity_meter

   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.

5. Multimeter - Wikipedia

   en.wikipedia.org/wiki/Multimeter

   The meter comprised a moving coil meter, voltage and precision resistors, and switches and sockets to select the range. The first Avometer had a sensitivity of 60 Ω/V, three direct current ranges (12 mA, 1.2 A, and 12 A), three direct voltage ranges (12, 120, and 600 V or optionally 1,200 V), and a 10,000 Ω resistance range.

6. Smart meter - Wikipedia

   en.wikipedia.org/wiki/Smart_meter

   The term smart meter often refers to an electricity meter, but it also may mean a device measuring natural gas, water or district heating consumption. [1] [2] More generally, a smart meter is an electronic device that records information such as consumption of electric energy, voltage levels, current, and power factor.

7. List of electrical and electronic measuring equipment

   en.wikipedia.org/wiki/List_of_electrical_and...

   Capacitance meter: Measures the capacitance component Current clamp: Measures current without physical connection Curve tracer: Applies swept signals to a device and allows display of the response Cos Phi Meter: Measures the power factor Distortionmeter: Measures the distortion added to a circuit Electricity meter: Measures the amount of energy ...