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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 2000 A Current Range
True RMS clamp multimeter with 2000 A AC/DC current range, voltages up to 1000 V AC/DC. CAT IV 600 V / CAT III 1000 V, 55 mm maximum conductor diameter, DC power, resistance, capacitance, continuity, inrush, optional Bluetooth with Z3210
• Current measurement up to 2000 A AC/DC
• Voltage measurement up to 1000 V AC/DC (2000 V DC with optional P2010)
• 55 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
• High-current measurement in industrial power distribution, switchgear, and large-scale equipment
• Maintenance and troubleshooting of solar power systems and high-voltage EV chargers
• Inrush current testing for large motors, transformers, and heavy machinery
• On-site diagnostics and field service where large conductor sizes require 55 mm jaws
The HIOKI CM4373-50 Clamp Multimeter is the right choice for professionals who need safe and precise measurement of very large AC/DC currents. With a wide 2000 A range and True RMS accuracy, it is ideal for industrial power distribution, heavy machinery, and EV charging systems. Its 55 mm jaws accommodate large diameter insulated conductors, enabling reliable measurement in applications where smaller clamp meters may not fit.
Voltage measurement up to 1000 V AC/DC covers most requirements. 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 high voltage batteries. True RMS technology ensures accurate results even with distorted waveforms.
Beyond current and voltage, the HIOKI CM4373-50 also functions as a versatile multimeter: it measures resistance, capacitance, continuity, diode polarity check, and DC power. This extends its usefulness in photovoltaic systems, high voltage batteries, and other DC applications where current, voltage, and power need to be checked together. Temperature measurement is supported with a K thermocouple such as the optional DT4910 Thermocouple (K), covering -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. The instrument remains suitable for field use across a wide operating temperature range from -25 °C to 65 °C.
The optional Z3210 Bluetooth Adapter adds wireless data transfer to a smartphone or tablet. With the free GENNECT Cross app for Android and iOS, measured values can be stored, linked to a photo of the measurement location, and used for service documentation. Current waveforms can also be displayed on the mobile device, supporting troubleshooting under changing load conditions.
The CM4373-50 complies with CAT IV 600 V / CAT III 1000 V, and with the P2010 it also supports CAT III 2000 V. Its rugged housing is rated IP54 for dust and splash resistance.
HIOKI’s decades of experience in current measurement are reflected in the CM4373-50. Manufactured at HIOKI’s own factories in Japan, it combines precise current measurement with robust construction and workmanship that stands up to high currents and daily field use.
• CM4373-50 Clamp Multimeter
• L9300 Test leads
• C0203 Carrying Case
• 2 × AAA (LR03) batteries
• Instruction manual
• Safety instructions
• Z3210 Bluetooth Adapter
• P2010 High Voltage Probe
• 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
• CM4371-50 Clamp Multimeter
• CM4371-90 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
