AC/DC CLAMP METER
CM4375
Innovative Jaw Provides Remarkable Accessibility

Hioki clamp on meters are best-in-class measuring devices incorporating Hioki’s expertise in current sensing technology. The CM4375 is a 1000A AC/DC True RMS clamp meter that features a uniquely designed slim jaw that lets you easily get into the narrow gaps between cables in crowded electrical distribution boxes without fear of damaging the cables or the clamp meter. The broad -25℃ to 65℃ operating temperature range and IP54 dustproof and waterproof enclosure to enable professionals to work quickly in challenging situations including the development, repair, and maintenance of equipment and devices such as electric vehicles. Additionally, the high-voltage DC measurement capability of up to 1700 V (*1) is ideal for the clamp maintenance inspections of electrical and solar power equipment.
CAT IV 600 V CAT III 1000 V | Model No. (Order Code)
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• Easily get into tight spaces between cables thanks to thin sensor structure
• Measure up to 1000 A
• Automatic AC/DC function helps boost work efficiency
• Measure DC voltages of up to 1700 V (*1)
• Simultaneously measure inrush current in RMS and crest values
• Expanded -25 °C to 65 °C operating temperature range
• 3 year guarantee
*1 Your instrument can be used to measure voltages in excess of 1000 V DC if and only if both of the following conditions are satisfied: 1. The circuit under measurement is isolated from the commercial power grid. 2. The circuit under measurement is isolated from ground.
To request a demo or get a quote, please contact us.
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Made for Real-World Situations Uncompromising Design Panel overcrowding is commonly found in many power distribution breakers and termination boxes. The newly designed thin sensor gets into even the most limited spaces. Eliminate the issues of trying to find the right wire or forcing the clamp around thick cables. |
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Damage-resistant jaws! Guaranteed for 30,000 open-close cycles The new and improved design features stronger jaws (the current sensor portion of the instrument) and a dramatic boost in the duration of the warranty from 10,000 to 30,000 open-close cycles to ensure the instrument will provide even more years of reliable use. The CM4375, CM4376, CM4141 and CM4142 deliver the dual functionality of ease of clamping and resistance to damage. |
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Inrush (Rush current): Assess transient currents at motor startup
The CM4000 Series can simultaneously measure inrush current in RMS as well as maximum crest values at motor startup and for welding currents.
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Video: Use a Clamp Meter to Measure Starting Current Learn the key considerations when choosing a clamp-on current meter to measuring the starting current of a motor or engine. Check the waveforms on a mobile device with our Bluetooth Model CM4376. |
Basic specifications (Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year)
*1 Your instrument can be used to measure voltages in excess of 1000 V DC if and only if both of the following conditions are satisfied: 1. The circuit under measurement is isolated from the commercial power grid. 2. The circuit under measurement is isolated from ground.
DC Current range | A1000 A, (Max. display 999.9 A) , Basic accuracy: ±1.3% rdg. ±0.3 A (at 30.1 A - 999.9 A) |
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AC Current range | 1000 A (Max. display 999.9 A, 10 Hz to 1 kHz, True RMS), Basic accuracy 45-66 Hz: ±1.3% rdg. ±0.3 A (at 30.1 A - 900.0 A) |
Crest factor | 1.5 |
DC+AC Current range | 1000 A (DC, 10 Hz to 1 kHz, True RMS), Basic accuracy DC, 45-66 Hz: ±1.3% rdg. ±1.3 A (at 30.1 A - 900.0 A) |
DC Power range | 0.0 VA to 1700 kVA (Automatically switched based on voltage range), Basic accuracy: ±2.0% rdg. ±20 dgt. |
DC Voltage range | 600.0 mV to 1500 V (*1), 5 ranges, Basic accuracy: ±0.5% rdg. ±0.5 mV (at 600 mV) |
AC Voltage range | 6.000 V to 1000 V, 5 ranges (15 Hz to 1 kHz, True RMS), Basic accuracy 45 - 66 Hz: ±0.9% rdg. ±0.013 V (at 6 V) |
DC+AC Voltage range | 6.000 V to 1000 V, 5 ranges, Basic accuracy DC, 45-66 Hz: ±1.0% rdg. ±0.023 V (at 6 V) |
Resistance range | 600.0 Ω to 600.0 kΩ, 4 ranges, Basic accuracy: ±0.7% rdg. ±0.5 Ω (at 600 Ω) |
Electrostatic capacity range | 1.000 μF to 1000 μF, 4 ranges, Basic accuracy: ±1.9% rdg. ±0.005 μF (at 1 μF) |
Frequency range | 9.999 Hz to 999.9 Hz, 3 ranges, Basic accuracy: ±0.1% rdg. ±0.003 Hz (at 9.999 Hz) |
Temperature (K) | -40.0 to 400.0 ˚C, add temperature probe accuracy to basic accuracy of ±0.5% rdg. ±3.0 ˚C |
Other functions | Automatic AC/ DC detection, DC current and DC voltage polarity detection function, MAX/ MIN/ AVG/ PEAK MAX/ PEAK MIN value display, Low-pass filter function, Display value hold, Auto hold, Backlight, Auto power save, Buzzer sound, Zero-adjustment |
Dustproof, waterproof | IP54 (Storage or measurement of current of an insulated conductor) |
Interface | N/A |
Power supply | LR03 Alkaline battery ×2, Continuous use: 40 hr (Backlight OFF) |
Core jaw diameter | φ34 mm (1.34 in) |
Smallest dimension of jaw cross-section | 9.5 mm (0.37 in) (Range value of 44 mm (1.73 in) from the tip of the jaw) |
Dimensions and mass | 65 mm (2.56 in) W × 242 mm (9.53 in) H × 35 mm (1.38 in) D mm, 330 g (11.6 oz) |
Accessories | TEST LEAD L9207-10, CARRYING CASE C0203, LR03 Alkaline battery ×2, Instruction Manual ×1 |
Catalog: AC/DC CLAMP METER AC CLAMP METER CM4000 series | Download PDF [6MB] | English |
Catalog: AC/DC CLAMP METER series | Download PDF [6MB] | English |