Hioki

Hioki CM4001-90

Name: Hioki CM4001-90 AC Leakage Clamp Meter with Wireless Adapter
Brand: Hioki

Hioki CM4001 AC leakage clamp meter, full view on a white background (the CM4001-90 bundle adds the Z3210 wireless adapter)

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CM4001-90 bundle: meter plus Wireless Adapter Z3210

Bundle:: AC Leakage Clamp Meter CM4001 plus Wireless Adapter Z3210 (the CM4001 sold alone is order code CM4001)
AC current range:: 60.00 mA / 600.0 mA / 6.000 A / 60.00 A / 600.0 A, 5 ranges (40 Hz to 1 kHz, True RMS)
Frequency range:: 40.0 Hz to 999.9 Hz

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Package details

Model: CM4001-90

The CM4001 meter plus the Wireless Adapter Z3210 in one box.

Condition:: Confirm new or reconditioned on the listing
Quantity:: Confirm package quantity on the listing
Included essentials:: Carrying case C1022, wrist strap Z7063, instruction manual, operating precautions, 1x LR03 alkaline battery

Important limit: AC current only; it cannot measure DC current

Confirm condition, quantity and included accessories on the retailer’s listing.

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Specifications checked November 5, 2026. Full product details

Size and package

Size and placement

Dimensions and mass: 37 mm W × 160 mm H × 27 mm D, 115 g (4.1 oz)

In the box

Carrying case C1022, wrist strap Z7063, instruction manual, operating precautions, 1x LR03 alkaline battery

Manufacturer specifications

Hioki CM4001-90 AC Leakage Clamp Meter with Wireless Adapter

The Hioki CM4001 slim-jaw AC leakage clamp meter bundled with the Wireless Adapter Z3210, adding Bluetooth logging and event recording through the free GENNECT Cross app.

Which version should you buy?

Selected package: CM4001-90 bundle: meter plus Wireless Adapter Z3210.

Bundles and accessories

CM4001-90 bundleModel: CM4001-90
Contents and availability
The CM4001 meter plus the Wireless Adapter Z3210 in one box.
Buyers who want app logging and Excel direct input from the start.

Related models and generations

These are different products. Check their specifications separately.

CM4001 standalone Model: CM4001
Same meter without the wireless adapter; can be added later.
Buyers who do not need wireless logging.
View CM4001 standalone

Purchase links appear where the exact offer is verified. Confirm the named model, quantity and accessories before ordering.

Watch out

The -90 suffix means the Z3210 adapter is bundled, not a different meter.
CM4001 measures AC current only; it is not a DC-capable clamp.

Why people pick it

Ships with the Z3210 wireless adapter already included, so logging to the free GENNECT Cross app works out of the box
Slim jaws with a 24 mm opening reach into crowded wiring and between closely spaced conductors
Guaranteed accuracy from 0.60 mA to 600.0 A covers both leakage tracing and load checks
Wireless event recording helps identify the intermittent earth leakage that trips GFCIs and RCDs
Comparator function flags threshold violations with a red backlight and beeper

Know before you buy

AC current only; it cannot measure DC current
No voltage or resistance measurement functions
Battery life drops from 32 to 16 hours while wireless is in use
Costs more than the bare CM4001; buyers who do not need logging can save with the base order code

Full specifications

Bundle	AC Leakage Clamp Meter CM4001 plus Wireless Adapter Z3210 (the CM4001 sold alone is order code CM4001)
AC current range	60.00 mA / 600.0 mA / 6.000 A / 60.00 A / 600.0 A, 5 ranges (40 Hz to 1 kHz, True RMS)
Basic accuracy	45-66 Hz: ±1.5% rdg. ±5 dgt (60.00 mA to 6.000 A); ±2.5% rdg. ±5 dgt (60.00 A to 600.0 A)
Guaranteed accuracy range	From 0.60 mA to 600.0 A
Frequency range	40.0 Hz to 999.9 Hz
Filter function	Cutoff frequency 180 Hz ±30 Hz when filter is on (-3 dB)
Comparator function	Threshold-based pass/fail judgement with red backlight and audio alerts
Other functions	Max/Min/Avg recording, AC inrush function, data hold, backlight, auto power off
Wireless	Bundled Wireless Adapter Z3210 provides Bluetooth; readings transfer to the free GENNECT Cross app on a smartphone or tablet, or directly into an Excel template
Harmonic analysis	Current harmonic levels up to 30th order, content factor and total harmonic distortion with Z3210 installed
Display	Display refresh rate 5 times per second
Power supply	1x LR03 alkaline battery; 32 hours continuous use (16 hours with Z3210 wireless in use)
Core jaw diameter	φ24 mm (0.94 in.)
Dimensions and mass	37 mm W × 160 mm H × 27 mm D, 115 g (4.1 oz)
Included accessories	Carrying case C1022, wrist strap Z7063, instruction manual, operating precautions, 1x LR03 alkaline battery

From manufacturer documentation, checked November 5, 2026. Spotted an error? Tell us.

Alternatives to consider

Fluke 325

Max voltage: 600 V
Safety rating: CAT III 600 V, CAT IV 300 V

Specifications & conditions

Max current: 400 A

A true-RMS 400 A clamp meter for commercial and residential troubleshooting, with AC/DC current and voltage, resistance, capacitance, frequency and temperature.

Pros
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Fluke 368 FC

Display counts: 3,300 counts
Safety rating: CAT III 600 V / CAT IV 300 V

Specifications & conditions

Max current: 60 A

A true-rms AC leakage current clamp with a fully shielded 40 mm jaw, 1 μA resolution up to 60 A, a selectable filter, and Fluke Connect wireless logging.

Check package and model options

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Hioki CM4001

Max current: 600 A

A slim-jaw AC leakage clamp meter with guaranteed accuracy from 0.60 mA to 600.0 A, built to clamp into crowded wiring and find earth leakage that trips GFCIs and RCDs.