AC/DC CLAMP METER CM4375-90

-Current measurement up to 1000 A AC/DC
-Super slim 34 mm jaw design for tight spaces
-Voltage measurement up to 1000 V AC/DC (2000 V DC with optional P2010)
-Safety rated CAT IV 600 V / CAT III 1000 V and CAT III 2000 V with P2010
-Integrated Bluetooth communication with included Z3210 adapter

Applications
-Current and voltage measurements in distribution boards, wiring, and industrial equipment
-Measurements in confined spaces thanks to super slim 34 mm jaw design
-Maintenance and troubleshooting of solar power systems and EV chargers
-Inrush current testing for motors and load changes

Product Description
The HIOKI CM4375-90 Clamp Multimeter is designed for professionals who often work in confined installation spaces and need precise AC/DC current measurement. As a set consisting of the HIOKI CM4375-50 and the included Z3210 Bluetooth Adapter, it combines a 1000 A range, True RMS accuracy, and wireless capability for industrial power distribution, machinery, and EV charging systems. Its narrow jaws accommodate conductors up to 34 mm in diameter, while the compact front end with a jaw cross-sectional minimum dimension of 9.5 mm supports access between closely routed conductors in crowded wiring.
Voltage measurement up to 1000 V AC/DC covers most applications. 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.

Versatile multimeter functions
Beyond current and voltage, the HIOKI CM4375-90 also functions as a versatile multimeter: it measures resistance, capacitance, continuity, diode polarity check, and DC power. This is particularly useful in photovoltaic systems, battery applications, and other DC installations where electrical values and power conditions need to be checked quickly on site. Temperature measurement can also be carried out with a K thermocouple such as the optional DT4910 Thermocouple (K), covering -40 °C to 400 °C for service work and inspections. 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 and save time.
The included L9300 test leads are designed with the user in mind. Their slide type mechanism allows the metal tips to be extended or retracted, making removable caps and the risk of losing them a thing of the past. This simplifies handling and enables a safe switch between short tips for higher CAT ratings and fully extended tips for tight measurement points. The display backlight makes readings easier in poorly lit distribution boards, control cabinets, and service environments. Its -25 °C to 65 °C operating temperature range makes the instrument suitable for service tasks in cold surroundings as well as in thermally demanding installation environments.

Bluetooth and safety ratings
With the included Z3210 Bluetooth Adapter, measured values can be transferred wirelessly to a smartphone or tablet. In combination with the free GENNECT Cross app for Android and iOS, values can be stored, documented, and displayed directly on the mobile device. This is particularly useful when the instrument is used in confined installations or at measurement points where the display is difficult to see. Values can also be linked to a photo of the measurement location and used for service documentation. In addition, the Z3210 supports HID functionality for direct transfer of measured values into Excel or other applications.
The CM4375-90 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.

Designed and manufactured in Japan
HIOKI has been developing high precision current sensing technology for demanding measurement tasks for decades, and this expertise is also reflected in its clamp meters and clamp multimeters. The CM4375-90 is manufactured at HIOKI’s own factories in Japan and stands for precise readings, robust workmanship and a clamp design whose quality becomes especially clear in confined installation spaces.