Meter (electronics)

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In electronics, a meter is an instrument for displaying the magnitude of one of a wide variety of quantities in electrical circuits. The term can refer to either an electronic component that is part of a larger device, or a free-standing test instrument.

• A multimeter is a general-purpose test instrument.
• A voltmeter is a specialized meter measuring voltage.
• An ammeter is a specialized meter measuring electric current.
• An ohmmeter is a specialized meter measuring electrical resistance.
• A wattmeter is a specialized meter measuring electric power.
• A capacitance meter is a test instrument measuring capacitance.
• A LCR meter measures inductance, capacitance, resistance and a combination thereof.
• An electrometer is a test instrument measuring electric charge.
• A clamp meter is an AC current-measuring test instrument that clamps around a wire.
• A VU meter is a specialized meter measuring volume of audio signals.
• An EMF meter is a test instrument for measuring electromagnetic fields.
• An SWR meter is a test instrument for measuring the standing wave ratio of a radio transmitter and its antenna.
• An S meter is a component of a radio receiver that displays the received signal's strength.
• An electric meter and smart meter are instruments that measure the electric power delivered to a customer by a utility for billing purposes.
• A grid dip meter, or dip meter, is a test instrument for measuring the resonance frequency of radio circuits.
• A microwave power meter is a test instrument for measuring the power of microwave signals.
• A time domain reflectometer is a test instrument for finding faults in cables.
• A galvanometer is a mechanical moving-pointer type meter, especially an old one, or its motive mechanism used as a component in other devices.