Hioki CM4002 AC Leakage Clamp Meter

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Hioki CM4002 AC Leakage Clamp Meter is a device used to measure leakage current in electrical systems. Leakage current is an undesired current that flows in the electrical system due to insulation faults or other reasons, and can potentially cause electrical shocks, fires, or equipment damage.
Application: Electrical safety inspections, HVAC systems, Testing appliance safety, Testing GFCI circuits.

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Hioki CM4002 AC Leakage Clamp Meter is designed to measure AC and DC leakage currents up to 600A, with a frequency range of 10Hz to 1kHz. The device features a clamp-on sensor that can measure the leakage current without disconnecting the electrical circuit, making it a safe and convenient tool for troubleshooting electrical systems. This device also features a data hold function that allows users to freeze the displayed reading for easier recording, as well as a maximum hold function that captures the highest reading during the measurement process.
Features of Hioki AC Leakage Clamp Meter:

  • Measurable conductor diameter up to φ40 mm

  • Display refresh rate: 5 times/s

Additional information



Model No


AC Current

6.000 mA, 60.00 mA, 600.0 mA, 6.000 A, 60.00 A, 200.0 A, 6 ranges


15.0 Hz to 2000 Hz

Crest factor

3 (other than 200.0 A range), 1.5 (200.0 A range)

Filter Function

Cut off frequency: 180 Hz ±30 Hz at filter ON (-3 dB)


Display refresh rate: 5 times/s

Power Supply

AA-size alkaline battery (LR6) × 2; Continuous operating time: 48 hr. (without Z3210 installed), 30 hr. (with Z3210 installed and using wireless communications)

Jaw opening

φ 40 mm (1.57 in.)

Supply Scope

Carrying case C0203 × 1, Instruction manual × 1, Operating Precautions × 1, AA-size alkaline battery (LR6) × 2


64 mm (2.52 in) W × 233 mm (9.17 in) H × 37 mm (1.46 in) D


400 Grams

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Hioki CM4002 AC Leakage Clamp Meter

Hioki CM4002 AC Leakage Clamp Meter