CM4373-90 AC/DC Clamp Meter/Wireless Adapter

^{* with HV probe P2000}

• simple harmonic analysis up to 30th order using the GENNECT Cross mobile app
• TrueRMS measurement
• non-contact voltage detection
• guaranteed operating ambient temperature range -25 to 65 °C
• capture of inrush currents simultaneously in RMS and peak values
• optional HV probe P2000 available for higher DC voltages
• optional Z3210 adapter for communication with smart devices via Bluetooth and GENNECT Cross app
• direct export of measurement data to Excel with the Z3210 adapter

Simple harmonic + THD analysis

Installation of the Z3210 adapter and pairing with the GENNECT Cross app:

Direct export of measured data to Excel:

Detailed Product Overview

The CM4373-90 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, ensuring accurate measurement in applications where smaller clamp meters may not fit. The CM4373- 90 comes as a set consisting of the CM4373-50 Clamp Multimeter and the Z3210 Bluetooth adapter, providing wireless capability right out of the box.

Voltage measurement up to 1000 V AC/DC covers most requirements. When paired with the optional P2010 High Voltage Divider, the measurement range extends up to 2000 V DC in CAT III environments, making the instrument suitable for safe testing of photovoltaic strings and high-voltage batteries. True RMS technology guarantees reliable results even with distorted waveforms.

Versatile multimeter functions

Beyond its high-current capability, the CM4373-90 also offers a full set of multimeter functions: resistance, capacitance, continuity, diode polarity check, and inrush current measurement. Automatic AC/DC detection and advanced display options (Max/Min/Avg, PEAK values, filter function, manual/auto hold, pass/fail judgement) make everyday tasks faster and more efficient. The included L9300 test leads feature a slide-type mechanism that allows the metal tips to be extended or retracted, eliminating removable caps and simplifying handling.

Bluetooth and safety ratings

With the included Z3210 Bluetooth adapter, measurement data can be transferred directly to the GENNECT Cross app on iOS or Android smart devices for easy wireless logging and reporting. The app also enables harmonic analysis from 1st to 30th order for extended diagnostic capability.

The CM4373-90 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, ensuring safe operation on construction sites and in harsh outdoor conditions. Like all HIOKI instruments, the CM4373-90 is designed and manufactured at HIOKI’s own factories in Japan, ensuring accurate performance, safety, and long-term reliability.