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Current clamps or clamp meters are measuring devices that allow non-contact recording of current and voltage. The clamp is placed around the current wire and the electrical parameters are measured by this device.

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Current clamps measure the current in a single wire. The device measures the magnetic field and thus measure the current of a single wire. Multi-wire cables cannot be directly measured because the current flowing back and forth cancels out. However, current clamps measure without contact, i.e. the circuit does not have to be disconnected.

Important purchase criteria are measuring range, measuring types, as well as direct and alternating current.

Types of measurement

Conventional current clamps can measure direct and alternating current. It is also possible to measure DC and AC voltage. Finally it is possible to deduce the resistance.

Measuring range

The measuring range indicates the range in which the above-mentioned parameters can be measured, e.g. maximum and minimum current, voltage, etc.

Features

Further are e.g. Data Hold, Max Peak evaluation and so on. Some devices also allow measurements as with conventional multimeters.

Review of the best and affordable clamp meters.

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