Which device is used to measure the current flowing through a circuit?

The clamp meter is specifically designed to measure the current flowing through a circuit without the need to disconnect it from the circuit. This device operates by clamping around a conductor, allowing it to measure the magnetic field generated by the current flow. This is particularly useful in situations where it would be inconvenient or unsafe to break the circuit.

While a multimeter can also measure current, it requires the circuit to be broken in order to insert the probe in series with the circuit, which can be less practical in some scenarios. A voltage tester is used to check for the presence of voltage in a circuit, not for measuring current directly. An ohmmeter measures resistance in a circuit rather than current flow. Hence, the clamp meter stands out as the preferred choice for directly measuring current in a live circuit.