Clamp meter

Clamp meter is a sort of measuring instrument, multimeter, which is equipped with a measuring sensor to measure current. Such a sensor provides a noncontact method of current measurement which is based on the measurement of the magnetic field around a conductor with current. AC strength can be judged by the intensity of current magnetic field which forms when current flows through a conductor. Clamp meters are very useful for noncontact measurement of current in a separate conductor located in a wiring harness. Thereto close the clamps around the needed conductor.

Current clamps are based on split core transformer, Hall sensor, a flexible magnetic conductor or so-called Rogowski coil.

Hall sensor used in clamp meters

Hall sensor used in clamp meters

Clamp meter construction based on two Hall sensors

Clamp meter construction based on two Hall sensors.

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Schrieffer, John Robert

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