AC/DC CLAMP METER CM4371-50

-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

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

Product Description
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.

Versatile multimeter functions
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, 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. 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.

Bluetooth and safety ratings
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 for later documentation. In addition, the Z3210 supports direct transfer of measured values into Excel or other applications.
In terms of safety, the CM4371-50 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.

Designed and manufactured in Japan
HIOKI has been a trusted name in high precision current sensing technology for decades, and this expertise flows directly into the design of HIOKI’s clamp meters and clamp multimeters. The CM4371-50 is manufactured at HIOKI’s own factories in Japan and stands for precise measurements, clean workmanship and quality that is visible and tangible in daily use.