HIOKI CM4371-90 - 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 measurement, Bluetooth included

€548.00

Content: 1 Each

In stock in Germany

€548.00

HIOKI CM4371-90 - AC/DC True RMS Clamp Multimeter with 20 A and 600 A Current Ranges

Product number: CM4371-90

Available stock: 1

GTIN/EAN: 4536036014200

Length: 215 mm

Width: 65 mm

Height: 35 mm

Weight: 0.4 kg

Product information HIOKI CM4371-90 - AC/DC True RMS Clamp Multimeter with 20 A and 600 A Current Ranges

Key Specification

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
Integrated Bluetooth communication with included Z3210 adapter

Typical Applications

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

Feature	CM4371-50 CM4371-90	CM4373-50 CM4373-90 CM4373-93	CM4375-50 CM4375-90 CM4375-93	3287	3288-20	3288
Current (AC / DC)	20 A / 600 A	600 A / 2000 A	1000 A	10 A / 100 A	100 A / 1000 A	100 A / 1000 A
True RMS	Yes					-
Voltage (AC / DC)	1000 V			600 V
AC+DC voltage and current	yes			-
Safety Rating	CAT IV 600 V CAT III 1000 V			CAT III 300 V (voltage) CAT III 600 V (current)
Bluetooth	available or included			-

Detailed Product Description

The HIOKI CM4371-90 Clamp Multimeter is an essential tool for electricians, service engineers, and maintenance professionals who need precise current measurement across both small and large loads. Combining the HIOKI CM4371-50 with the included Z3210 Bluetooth Adapter, it offers the same dual range flexibility together with wireless connectivity 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.

Versatile multimeter functions

Beyond current and voltage, the HIOKI CM4371-90 also functions as a versatile multimeter: it measures resistance, capacitance, continuity, diode polarity check, and DC power. Temperature measurement is also available with a K thermocouple such as the optional DT4910 Thermocouple (K), allowing readings from -40 °C to 400 °C during service and maintenance work. It also supports non contact voltage detection for a quick check for the presence of AC voltage, which is useful for an initial check at the measurement point but does not replace voltage measurement with test leads. 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 operating temperature range from -25 °C to 65 °C supports reliable use in cold outdoor conditions, unheated facilities, and high ambient temperatures.

Bluetooth and safety ratings

Because the Z3210 Bluetooth Adapter is included, 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 documented directly on site. Reports can be created on the mobile device and exported for further processing. When the instrument is installed in a position where the display is difficult to read, live readings can also be viewed on the smartphone or tablet in real time. In addition, the Z3210 supports HID functionality, allowing measured values to be transferred directly into Excel or other applications.

In terms of safety, the CM4371-90 complies with CAT IV 600 V / CAT III 1000 V. Furthermore, 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, ensuring safe operation on construction sites and in harsh outdoor conditions.

Precision from Japan

For decades, HIOKI has been developing clamp meters, clamp multimeters, current sensors and current clamps for precise current measurement. Manufactured at HIOKI’s own factories in Japan, the CM4371-90 stands for precise readings, robust workmanship and a level of quality that electricians and service technicians notice in every application.

CM4371-50 Clamp Multimeter
Z3210 Bluetooth Adapter
L9300 Test leads
C0203 Carrying Case
2 × AAA (LR03) batteries
Instruction manual - Safety instructions
Safety instructions

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