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Hioki is a leading manufacturer of electrical measuring instruments and test equipment, providing precision solutions for power analysis, battery testing and industrial maintenance. Its portfolio includes digital multimeters, clamp meters, power analysers, battery testers, data loggers and insulation testers. Trusted by engineers, electricians and researchers worldwide, Hioki products support applications in energy, automotive, electronics manufacturing and electrical maintenance.
AC/DC True RMS Clamp Multimeter with 20 A and 600 A Current Ranges
True RMS clamp multimeter with 20 A / 600 A ranges for AC/DC currents, voltages up to 1000 V AC/DC. CAT IV 600 V / CAT III 1000 V, 33 mm conductor diameter, DC power, resistance, capacitance, continuity, inrush, optional Bluetooth (Z3210)
• Dual current ranges: 20 A / 600 A AC/DC
• Voltage measurement up to 1000 V AC/DC (2000 V DC with optional P2010)
• 33 mm core jaw diameter
• Safety rated CAT IV 600 V / CAT III 1000 V and CAT III 2000 V with P2010
• Optional Bluetooth communication with Z3210 adapter
• AC/DC measurement in distribution boards, wiring, and industrial equipment
• Inrush current testing for motors and load changes
• Maintenance and troubleshooting of solar power systems and EV chargers
• Field service and preventive maintenance
The HIOKI CM4371-50 Clamp Multimeter is an essential tool for electricians, service engineers, and maintenance professionals who need precise current measurement across both small and large loads. Packed with features yet intuitive to use, it delivers True RMS accuracy and reliable performance for everyday field work.
With dual current ranges of 20 A and 600 A AC/DC, this model offers unique flexibility within the series. Low-current measurements benefit from improved resolution and accuracy in the 20 A range, while the 600 A range handles larger loads with ease. Its clamp accommodates conductors up to 33 mm in diameter, covering a wide range of work in distribution boards, wiring, and industrial equipment. Voltage measurement up to 1000 V AC/DC covers most applications, and when paired with the optional P2010 High Voltage Probe, the instrument can measure up to 2000 V DC in CAT III environments, enabling safe testing of photovoltaic strings and EV batteries. True RMS technology ensures accurate results even with distorted waveforms.
Beyond current and voltage, the HIOKI CM4371-50 also functions as a versatile multimeter: it measures resistance, capacitance, continuity, diode polarity check, and DC power. For temperature checks, the instrument can be used with a K thermocouple such as the optional DT4910 Thermocouple (K). The measurement range extends from -40 °C to 400 °C. It also supports non-contact voltage detection for a quick check for the presence of AC voltage. Automatic AC/DC detection and advanced display options such as Max/Min/Avg, PEAK values, filter function, manual/auto hold, and pass/fail judgement simplify daily tasks.
The included L9300 test leads feature a slide-type mechanism that allows the metal tips to be extended or retracted, eliminating removable caps. The display backlight makes readings easier in poorly lit environments. With an operating temperature range of -25 °C to 65 °C, the instrument is suited to outdoor service work in winter as well as use in hot plant environments.
With the optional Z3210 Bluetooth Adapter, measured values can be transferred directly to a smartphone or tablet. In combination with the free GENNECT Cross app for Android and iOS, values can be stored, assigned to measurement locations, and incorporated into reports. The Z3210 also supports direct transfer of measured values into Excel or other applications.
The CM4371-50 complies with CAT IV 600 V / CAT III 1000 V. When used with the optional P2010 High Voltage Probe, it also complies with CAT III 2000 V. Its housing is robust and rated IP54 for dust and splash resistance.
HIOKI has been a trusted name in high precision current sensing technology for decades. The CM4371-50 is manufactured at HIOKI’s own factories in Japan and stands for precise measurements, clean workmanship, and quality that is visible in daily use.
• CM4371-50 Clamp Multimeter
• L9300 Test leads
• C0203 Carrying Case
• 2 × AAA (LR03) batteries
• Instruction manual
• Safety instructions
• Z3210 Bluetooth Adapter
• P2010 High Voltage Divider
• DT4910 K-Type Thermocouple
• L4933 Contact Tip Set
• L4934 Small Alligator Clip Set
• C0207 Carrying Case
• L4930 Safety Test Leads
• L4935 Crocodile Clip Set
• L4936 Busbar Clip Set
• 9804 Magnetic Clip Set
• CM4371-90 Clamp Multimeter
• CM4373-50 Clamp Multimeter
• CM4373-90 Clamp Multimeter
• CM4373-93 Clamp Multimeter PV Kit
• CM4375-50 Clamp Multimeter
• CM4375-90 Clamp Multimeter
• CM4375-93 Clamp Multimeter PV Kit
