AC CLAMP METER
CM4141-50

True RMS 2000 A AC Clamp Meter
Innovative Current Sensor Design – Easily Get Into Tight Spaces

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Hioki clamp on meters are best-in-class measuring devices incorporating Hioki’s expertise in current sensing technology. The CM4141-50 is a 2000 A AC 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 high current measurement capability makes it especially useful for industrial applications.
Key Features
    • CAT IV 600 V, CAT III 1000 V When using P2000: CAT III 2000 V, CAT IV 1000 V
    • Easily get into tight spaces between cables thanks to thin sensor with a minimum cross-section span of 11 mm
    • Measure up to 2000 A AC
    • AC A, AC and DC V, DC+AC V, resistance, frequency, and more
    • Easily transfer measurement data to your smartphone or tablet by using our free app GENNECT Cross or to an Excel® file (*1)
    • Harmonic analysis from 1st to 30th order with GENNECT Cross (*1)

Model No. (Order Code)

CM4141-50 Wireless Adapter Z3210 not included
CM4141-90 Bundled with the Wireless Adapter Z3210

Note: Data can be downloaded to tablets and smartphones using Hioki’s dedicated free app “GENNECT Cross,” available from the Google Play or App Store.

*1:Wireless Adapter Z3210 is necessary.

Easy! Just connect the Z3210 Wireless Adapter to your Hioki compatible instrument, to make it Bluetooth® ready.

Wirelessly connect Hioki-compliant instruments with a simple connection.
Transfer measurements to your smartphone or tablet and quickly create reports with field photos and drawings.


Safe inspection of solar installations with high voltage

DC High V Probe Mode

– Enables high voltage measurement up to CAT III 2000 V
– Safely measure solar installations like the mega-solar without interrupting the grid by simply connecting the DC High Voltage Probe P2000 to compatible Hioki clamp meters and digital multimeters (DMMs)

See details about DC High Voltage Probe P2000


Wireless communication capability for even greater convenience

Wireless support

When the Wireless Adapter Z3210 is installed, Bluetooth® wireless communication is enabled. It transfers measurements to your smartphone or tablet and allows you to quickly create reports with field photos and drawings.

See details about Wireless Adapter Z3210


Excel® Direct Input Function (*1)

Boost work efficiency in the field by letting you directly transfer measurement data to (i.e., enter measured values directly into) templates created as Excel®.

*1:The optional Wireless Adapter Z3210 is required.


Helping personnel analyze issues in the field

Harmonic measurement

When combined with GENNECT Cross (*2), you can perform simple harmonic analysis. Applications include problem analysis of power supply systems.

See here for details about GENNECT Cross


Problems that can be caused by harmonics

– Equipment burn-out and destruction due to overheating
– Malfunctions of power control devices
– Increased loss along with reduced service life and efficiency for power devices

*2:GENNECT Cross is an free app that lets you connect field measuring instruments to smartphones and tablets using Bluetooth® communications. Wireless Adapter Z3210 (sold separately) is required in order to pair the instrument with GENNECT Cross.


Innovative Jaw Design

Clamp Sensor gets between wires even with Large Jaw Diameter

Despite the ability to measure up to 2000 A AC afforded by the large sensor with φ55mm core diameter, the clamp meter’s innovative jaw design lets you get between the narrow spaces between crowded cables with absolute ease. In addition, electrical panels are sometimes so crowded that you need to push and pull to the clamp to get it around the cable. The CM4141-50 features a robust construction that delivers strength while letting you weave through complex wiring to get to the right cable, vastly improving work efficiency and speed.

Compared with clamp meters of similar class, the meter weighs only 300 g, at least 100 g lighter than competitors, letting you use the instrument over long work days with significantly less effort and physical strain.


ข้อมูลจำเพาะ (รับประกันความแม่นยำของผลิตภัณฑ์ 1 ปี และ รับประกันความแม่นยำหลังการปรับแต่ง (Adjustment) โดย Hioki 1 ปี)

AC Current range 60.00 A to 2000 A, 3 ranges (45 Hz to 1 kHz, True RMS), Basic accuracy 45-66 Hz: ±1.5% rdg. ±0.08 A (60 A range)
Crest factor For the 60.00 A range: 2.5 (greater than 50.00 A and less than or equal to 60.00 A) to 2000 A range: 1.5 (2000 A or less)
DC Voltage range 600.0 mV to 1000 V (When using P2000: 600.0 V to 2000 V)
AC Voltage range 6.000 V to 1000 V, 4 ranges (15 Hz to 1 kHz, True RMS), Basic accuracy 45-66 Hz: ±0.9% rdg. 0.003 V (at 6 V)
DC+AC Voltage range 6.000 V to 1000 V, 4 ranges, Basic accuracy DC, 45-66 Hz: ±1.0% rdg. ±0.013 V (at 6 V)
Resistance range 600.0 Ω to 6.000 MΩ, 5 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 Voltage: 9.999 Hz to 999.9 Hz 3 ranges, Current: 99.99 Hz to 999.9 Hz 2 ranges, Basic accuracy: ±0.1% rdg. ±0.01 Hz (at 99.99 Hz)
Temperature (K) -40.0 to 400.0 ˚C, Basic accuracy: ±0.5% rdg. ±3.0 ˚C + temperature probe accuracy
Harmonic levels [With Z3210 installed] Voltage/Current harmonic levels up to 30th, Content factor, Total harmonic distortion ratio
*Harmonics can be displayed with our free app GENNECT Cross.
Other functions Continuity check, Diode check, Automatic AC/ DC detection (Voltage check only), Max/ Min/ AVG/ Peak waveform MAX/ Peak waveform MIN value display, Low-pass filter function, Display value hold, Backlight, Auto power save, Buzzer sound, Zero-adjustment, and other function
Dustproof, waterproof IP20 (Current measurement of voltage or hazardous live conductors under completely dry condition)
IP50 (When measuring or storing the resistance of a completely dry state or the current of an insulated conductor)
Power supply LR03 Alkaline battery ×2
Continuous use: approx. 48 hr (without Z3210 installed), approx. 24 hr. (with Z3210 installed and using wireless communications)
Other conditions: 100 A AC measurement, backlight off, 23°C reference value
Core jaw diameter φ55 mm (2.17 in), Jaw dimension: 82 mm (3.23 in) W × 11 mm (0.43 in) D (D dimension is a range value of 44 mm (1.73 in) from the tip of the jaw)
Smallest dimension of jaw cross-section 11 mm (0.43 in) (Range value of 44 mm (1.73 in) from the tip of the jaw)
Dimensions and mass 65 mm (2.56 in) W × 247 mm (9.72 in) H × 35 mm (1.38 in) D, 300 g (10.6 oz)
Included accessories Test Lead L9300 ×1, Carrying Case C0203 ×1, LR03 Alkaline battery ×2, Instruction Manual ×2, Operating Precautions ×1