Clamp meters, also known as clamp-on meters, are electrical test meters that have the capability of measuring AC current without breaking the circuit, allowing an electrical current to be measured without interrupting the circuit. This unique feature makes clamp meters invaluable when testing live circuits. Clamp multimeters are used to measure various electrical components such as resistance, voltage, current, frequency and more. These instruments can also be used to measure capacitance and inductance. Clamp meter accessories allow the user to extend the measurement range of the clamp meter and make the instrument more versatile. Accessories include flexible or rigid current clamps, current leads and adapters, high-voltage breakout clips, differential probes and more.