Shop clamp meters for measuring electrical current without opening or disconnecting the circuit. Clamp meters are widely used for electrical troubleshooting, HVAC service, facility maintenance and industrial equipment diagnostics.
Depending on the model, additional functions may include voltage, resistance, continuity, frequency, capacitance, temperature and inrush-current measurements.
Clamp meters measure current by sensing the electrical field around a conductor, allowing technicians to take current measurements without interrupting the circuit or making a direct series connection.
Key selection factors include AC-only or AC/DC current capability, maximum current range, conductor or jaw capacity, true-RMS measurement, accuracy and additional multimeter functions. Inrush-current capability can also be useful for motors, HVAC systems and other equipment with high startup current.
Verify that the meter's voltage rating, CAT rating and jaw opening are appropriate for the electrical system and conductors being measured.