Clamp Meters

Pick a meter by the types of measurements you need (AC/DC current, AC/DC voltage, resistance, continuity, capacitance, frequency, temperature), the maximum current and voltage ranges, accuracy class, safety rating (CAT II/III/IV), and desired features like True RMS, autorange, or data hold

True RMS provides accurate AC measurements on non-sinusoidal or distorted waveforms common with variable-speed drives and electronic loads; choose a True RMS clamp meter when working with modern electronics or when waveform distortion is likely

Look for IEC/EN safety categories (CAT II, CAT III, CAT IV) and a voltage rating matching your environment; higher CAT numbers indicate suitability for measurements closer to the distribution source and greater transient protection

Clamp meters typically provide sufficient accuracy for electrical diagnostics and troubleshooting; check the specified accuracy for current and voltage ranges and choose a meter with tighter accuracy and True RMS if precise measurements are required

Useful features include inrush/peak current capture, low-pass filter for variable-frequency drives, flexible current probes for large conductors, backlit display, data hold/min-max logging, Bluetooth or USB data transfer, and a durable housing with good ergonomics

Keep the meter clean and dry, store it in its case, replace batteries promptly, calibrate according to the manufacturer’s interval if required for professional use, and inspect leads/probe insulation and jaws for damage before each use

Basic clamp meters for simple AC current checks are available at lower price points, while True RMS, higher accuracy, wider ranges, and industrial safety ratings typically increase cost; expect a market range from budget models to more advanced professional meters, with an average price in the mid-hundreds for well-equipped units