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Hioki CM4373 AC/DC Clamp Meter
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Jual Hioki CM4373 AC/DC Clamp Meter

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Hioki CM4373 AC/DC Clamp Meter


Hioki CM4373 True RMS 2000 A AC/DC Clamp Meter for the Toughest Situations

Hioki clamp on meters are best-in-class measuring devices incorporating Hioki’s expertise in current sensing technology. Model CM4373 is a 2000A True RMS clamp meter that features stronger jaws, broader -25℃ to 65℃ operating temperature range and IP54 dustproof and waterproof enclosure to enable professionals to work quickly in tough 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 is ideal for the clamp maintenance inspections of electrical and solar power equipment.

Damage-resistant_jawsDamage-resistant jaws

A revised 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.

Clamp open/ close test

In this test, the jaws are opened and closed a specified number of times at the rate of one cycle per second. In addition, the test is continued until the jaws break to provide a better understanding of their strength. Tests like this help us improve the instrument’s durability.

-25˚C to + 65˚C

Expanded_operating_temperature_rangeThanks to an operating temperature range that has been expanded from the previous design (which could be used from 0°C to 40°C), the CM4371 and CM4373 can be used in freezing temperatures or on the hottest summer days.

Temperature test


In this test, we verified that the clamp meter can operate for an extended period of time while taking normal measurement in the specified temperature range.


Dustproof and waterproof performance

Dustproof_and_waterproof_performanceInternational Protection Code: IP54*
*Jaws (current sensor portion): IP50 Measurement functionality is maintained despite exposure to sand or dust as well as water droplets. Enhanced environmental resistance
Caution: The CM4370 Series’ waterproof enclosure is designed to enable the instrument to maintain its measurement functionality even when wet. Getting the instrument wet or measuring energized parts with wet hands increases risk of electric shock.

Dustproof and waterproof tests


In the dustproof test, the clamp meter’s enclosure is placed under reduced pressure and exposed to dust, and in the waterproof test, the instrument is sprayed with water from multiple directions in order to investigate how readily dust and water can get in.


CAT IV 600 V

The CM4371 and CM4373 can safely measure service wires with a wire-toground voltage of up to 600 V as well as wires found in distribution panels. The clamp meter series features a safe design that can withstand a transient overvoltage of 8 kV in case of a lightning strike.

DC 1700 V


The CM4371 and CM4373 can measure DC voltages of up to 1700 V, making them ideal for no-load voltage inspections of rapidly evolving solar power systems.


Manufacturer Specs

Hioki CM4373 True RMS 2000 A AC/DC Clamp Meter Specifications

DC Current600.0 A/2000 A, Basic accuracy: ±1.3% rdg. ±3 dgt.
AC Current600.0 A/2000 A, (10 Hz to 1 kHz, True RMS)
Basic accuracy: ±1.3% rdg. ±3 dgt.
DC Voltage600.0 mV to 1500 V, 5 ranges, Basic accuracy: ±0.5% rdg. ±3 dgt.
AC Voltage6.000 V to 1000 V, 4 ranges, (15 Hz to 1 kHz, True RMS)
Basic accuracy: ±0.9% rdg. ±3 dgt.
DC+AC Current600.0 A/2000 A, (10 Hz to 1 kHz, True RMS)
Basic accuracy: ±1.3% rdg. ±13 dgt.
DC+AC Voltage6.000 V to 1000 V, 4 ranges, Basic accuracy: ±1.0% rdg. ±7 dgt.
Resistance600.0 Ω to 600.0 kΩ, 4 ranges, Basic accuracy: ±0.7% rdg. ±5 dgt.
Electrostatic capacity1.000 μF to 1000 μF, 4 ranges, Basic accuracy: ±1.9% rdg. ±5 dgt.
Frequency9.999 Hz to 999.9 Hz, Basic accuracy: ±0.1% rdg. ±1 dgt.
Continuity checkContinuity threshold [ON]: 25Ω±10 Ω (Buzzor sound, red LED)Continuity threshold [OFF]: 245 Ω±10 Ω, Response time: 0.5 ms or more
DiodeOpen terminal voltage: DC2.0 V or less, Measurement current: 200 μA, forward connection: 0.15 V to 1.8 V
Temperature (K)-40.0 to 400.0 ˚C, add temperature probe accuracy to basic accuracy of ±0.5% rdg. ±3.0 ˚C
Voltage detectionHi: 40 V to 600 V AC, Lo: 80 V to 600 V AC, 50/60 Hz
DC PowerDisplay range switching: 0.000 VA to 3400 kVA, Accuracy: ±2.0% rdg. ±20 dgt.
Crest factor[600.0 A range] 500.0 A or less: 3; greater than 500.0 A and less than or equal to 600.0 A: 2.5
[2000 A range] 1000 A or less: 2.84; greater than 1000 A and less than or equal to 2000 A: 1.42
Other functionsAutomatic AC/DC detection, Plus/Minus judgement function of DC A, DC V, Max/Min/Average/PEAK MAX/ PEAK MIN value display, Filter function, Display value hold, Auto hold, Back light, Auto-power save, Buzzer sounds
DisplayUpdate rate: 5 times/s (excluding electrostatic capacity, frequency, and temperature)
Power supplyLR03 Alkaline battery ×2, Approx. 45 hours (Backlight OFF)
Core jaw diameter92 mm (3.62 in) W×18 mm (0.71 in) D, φ55 mm (2.17 in)
Dimensions and mass65 mm (2.56 in) W×250 mm (9.84 in) H×35 mm (1.38 in) D mm, 530 g (18.7 oz)
AccessoriesTEST LEAD L9207-10, CARRYING CASE C0203, LR03 Alkaline battery ×2, Instruction Manual

Measurement Specifications








Order Code

  • AC/ DC Clamp Meter CM4371 (600 A AC/ DC, φ33 mm)
  • AC/ DC Clamp Meter CM4373 (2000 A AC/ DC, φ55 mm)



Tech Specs

Clamp Meters/Clamp Meters Template

TypeStandard Style
True RMSYes
Maximum Current AC2000 A
Minimum Current AC600 A (600000 mA)
Maximum Current DC2000 A
Minimum Current DC600 A (600000 mA)
Maximum Voltage AC1000 V
Minimum Voltage AC6 V (6000 mV)
Maximum Voltage DC1500 V
Minimum Voltage DC600 mV
Basic Voltage AccuracyDC: ±0.5% rdg. ±3 dgt.
AC: ±0.9% rdg. ±3 dgt.
Resolution AC Volts0.001 V
Resolution DC Volts0.1 mV (0.0001 V)
Resolution AC Current0.01 A
Resolution DC Current0.01 A
Auto Power OffYes
In-Rush CurrentYes
Temperature (K T/C)Yes
Diode TestingYes
CAT RatingIV
CAT Voltage600 V
Crest FactorYes

Test Equipment General Attributes

Unique Features2000A AC/DC
Warranty3 YEARS
Safety ApprovalCE
Product Weight530 GRAMS (1.17 LBS)
Product Height9.84 IN
Product Length12.90 IN
Product Width2.56 IN
HTS/Schedule B Number9030.33.3400
ECCN Number3A992
Battery TypeOther 
Power Supply VoltageBattery Powered
Country of OriginJapan
Shipping Height2.60 IN
Shipping Length12.90 IN
Shipping Width5.95 IN
Other Information

Depth:: 1.38 in.

Clamp Meter

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