Accurate current measurement – for installation, maintenance, and troubleshooting
HIOKI Clamp Meters
HIOKI clamp meters offer professional-grade performance for precise AC or AC/DC current measurement. Choose from compact AC clamps like the CM3286-50 for routine load checks and basic power analysis, or go for robust AC/DC models such as the CM4375-90 with multimeter functions, wide current ranges, and slim jaws for use in tight panels. For precise leakage current detection, the CM4003-90 offers advanced filtering and Bluetooth® connectivity.
Discover the right clamp meter for your application in our extensive lineup.
3280-10F
3280-10F - AC Clamp Meter
The 3280-10F is a rugged and compact 1000A AC clamp meter with average rectifying functionality. It features a thin, compact clamp core and a broad operating temperature range of -25°C to 65°C, housed in a drop-tested casing. In addition to AC current measurement, the clamp meter also offers voltage and resistance measurement, as well as continuity check functions, making it versatile for a variety of electrical testing needs. Technical Details: Maximum AC current: 1000 A Rectification: Average rectifying Clamp core: Thin and compact • Operating temperature range: -25°C to 65°C • Functions: AC current measurement, voltage measurement, resistance measurement, continuity check • Housing: Drop-tested for rugged use
3280-70F
3280-70F - AC CLAMP METER
The 3280-70F is a rugged and compact 1000A AC clamp meter with average rectifying functionality. It features a thin, compact clamp core and a broad operating temperature range of -25°C to 65°C, housed in a drop-tested casing. In addition to AC current measurement, the clamp meter also offers voltage and resistance measurement, as well as continuity check functions, making it versatile for a variety of electrical testing needs.
The 3280-70F is a combination of the 3280-10F plus the CT6280 flexible AC current sensor.Technical Details: Maximum AC current: 1000 A Rectification: Average rectifying Clamp core: Thin and compact Operating temperature range: -25°C to 65°C Functions: AC current measurement, voltage measurement, resistance measurement, continuity check Housing: Drop-tested for rugged use
3287
3287 - AC/DC Current Probe
Compact AC/DC clamp meter, True RMS, 10/ 100 A, current, voltage, resistance, continuity and more
3288-20
3288-20 - AC/DC Current Probe
The 3288-20 AC/DC Clamp Multimeter is a compact, multi-functional clamp meter designed for quick and efficient equipment diagnostics. It measures AC/DC current and voltage, while also offering resistance, continuity, and crest factor checks. With a slim profile and double jaw lever, it’s ideal for accessing crowded wires in industrial environments. The True RMS functionality ensures precise measurements, even for distorted waveforms, making it perfect for high-current applications such as UPS emergency batteries and train motors. Technical Specifications: DC Current Range: 100.0 A / 1000 A, Basic accuracy: ±1.5 % rdg. ±5 dgt. AC Current Range: 100.0 A / 1000 A (10 Hz to 500 Hz, True RMS), Basic accuracy: ±1.5 % rdg. ±5 dgt.DC Voltage Range: 419.9 mV to 600 V, 5 ranges, Basic accuracy: ±1.3 % rdg. ±4 dgt. AC Voltage Range: 4.199 V to 600 V, 4 ranges, Basic accuracy: ±2.3 % rdg. ±8 dgt. (30 Hz to 500 Hz, True RMS) Resistance Range: 419.9 Ω to 41.99 MΩ, 6 ranges, Basic accuracy: ±2 % rdg. ±4 dgt. Crest Factor: 3 or less (2 at 1000 A range, 1.5 at Voltage)Display: LCD, max. 4199 dgt., Refresh rate: 2.5 times/s Power Supply: Coin type lithium battery (CR2032) × 1, Continuous use 35 hours Core Jaw Diameter: 35 mm (1.38 in) Dimensions: 57 mm (W) × 180 mm (H) × 16 mm (D)Weight: 150 g (5.3 oz) Operating Functions: Data hold, Auto power save, Auto zero (DC A), Continuity buzzer (50 Ω ±40 Ω or less) Safety Category: CAT III 600 V (Current), CAT III 300 V (Voltage)
CM3281
CM3281 - AC Current clamp meter
The CM3281 AC Clamp Meter is a robust tool designed for accurate measurement of AC current in a wide range of industrial and electrical applications. It measures currents up to 2000 A using a large jaw diameter of 46 mm, allowing for easy clamping of thick cables right at the terminal.The CM3281 operates in challenging environments with temperatures as low as -25°C and as high as 65°C, and is durable enough to withstand a 1-meter drop onto concrete. It offers mean value measurement, ensuring reliability across standard AC applications. Technical Details: AC Current Measurement Range: 42.00 A, 420.0 A, 2000 A Core Jaw Diameter: 46 mm Operating Temperature: -25°C to 65°CDrop-Proof: 1 meterSafety Rating: CAT IV 300 V, CAT III 600 V Power Supply: CR2032 coin-type battery (120 hours continuous use)Dimensions: 57 mm (W) × 198 mm (H) × 16 mm (D)
Weight: 103 g
CM3286-50
CM3286-50 - AC power clamp
The CM3286-50 AC Clamp Power Meter is designed to measure AC current, voltage, and power with a broad range, from 5 W to 360 kW, and currents from 60 mA to 600 A. It offers quick and accurate readings with true RMS measurement and can measure simple integral power consumption and phase sequence. The device features a large jaw diameter of 46 mm, allowing it to measure large-diameter cables, and its backlit display ensures easy reading even in dimly lit environments.With Bluetooth® communication (available via the optional Z3210 wireless adapter), data can be easily transferred for analysis. This versatile tool is ideal for applications ranging from manufacturing plants to household measurements. Technical Details: Model: CM3286-50 Current Measurement Range: 60 mA to 600 A AC Voltage Measurement Range: 80 V to 600 V AC Power Measurement Range:
o Single-phase: 5 W to 360 kW
o Balanced three-phase 3-wire: 20 W to 623.5 kW
o Balanced three-phase 4-wire: 40 W to 1080 kW Frequency Range: 45 Hz to 999.9 Hz Maximum Rated Voltage to Ground: 600 V CAT IV, 1000 V CAT III Operating Temperature: -25°C to 65°C Jaw Diameter: 46 mm Dimensions: 65 mm (W) × 241 mm (H) × 35 mm (D) Weight: 450 g Power Supply: 2 × LR03 Alkaline batteries (25 hours continuous use) Optional Wireless Adapter: Z3210 for Bluetooth® connectivity
CM3289
CM3289 - AC CLAMP METER
The CM3289 is a 1000A True RMS AC clamp meter designed to measure AC currents up to 1000A with a basic accuracy of 1.5%. In addition to current measurement, it offers functions such as resistance measurement, continuity testing, and AC/DC voltage measurement, all within a pocket-sized, portable design. The unit operates in a temperature range of -25°C to 65°C and supports cable diameters up to 33 mm. For larger diameters, the optional CT6280 flexible current sensor can be used. The clamp meter complies with safety categories CAT IV 300V, CAT III 600V (current), and CAT III 300V (voltage), ensuring safe operation in a wide range of environments. Technical Details: Maximum AC current: 1000A Accuracy: 1.5% (basic)
• Additional functions: Resistance measurement, continuity testing, AC/DC voltage measurement Operating temperature: -25°C to 65°C Cable diameter: Up to 33 mm (larger diameters with optional CT6280 flexible current sensor) Safety categories: CAT IV 300V, CAT III 600V (current), CAT III 300V (voltage)
CM4001
CM4001 - AC Leakage Clamp Meter
The CM4001 is a compact AC leakage clamp meter equipped with slim measuring clamps, allowing easy clamping into tightly packed cables with diameters up to 24 mm. This design enhances safety and reduces working time. The meter offers precise accuracy for current measurements ranging from 0.60 mA to 600.0 A, and operates within a frequency range of 40-1000 Hz. The CM4001 provides a complete solution for various applications, including harmonic measurements. An integrated comparator function enables quicker problem detection. Additionally, the device is Bluetooth-ready for wireless data transmission. Technical Details: Measuring range: 0.60 mA to 600.0 A Frequency range: 40-1000 Hz Cable diameter: Up to 24 mm Key functions: Harmonic measurement, comparator function Wireless data transmission: Prepared for Bluetooth Features: Slim measuring clamps for easy clamping in tight spaces
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CM4001-90
CM4001-90 - AC Leakage Clamp Meter, Bluetooth
The CM4001-90 is a compact AC leakage clamp meter equipped with slim measuring clamps, allowing easy clamping into tightly packed cables with diameters up to 24 mm. This design enhances safety and reduces working time. The meter offers precise accuracy for current measurements ranging from 0.60 mA to 600.0 A, and operates within a frequency range of 40-1000 Hz. The CM4001 provides a complete solution for various applications, including harmonic measurements. An integrated comparator function enables quicker problem detection. CM4001-90 is bundled with the Z3210 Bluetooth-Module wireless data transmission. Technical Details: Measuring range: 0.60 mA to 600.0 A Frequency range: 40-1000 Hz Cable diameter: Up to 24 mm Key functions: Harmonic measurement, comparator function Wireless data transmission: Prepared for Bluetooth Features: Slim measuring clamps for easy clamping in tight spaces • Wireless data transmission via Bluetooth using Z3210 module
CM4002
CM4002 - AC Leakage Clamp Meter
The CM4002 is a true RMS AC leakage current meter with a measuring range of 6 mA to 200 A and a frequency range of 15 to 2000 Hz. It is designed for conductors with a diameter of up to 40 mm and offers a variety of functions, including Max/Min/AVG/PEAK MAX/PEAK MIN value display, display hold and auto-hold, backlight, automatic energy saving mode, acoustic signal (buzzer), event display, comparison function, simple event recording and inrush current measurement.The CM4002 is also prepared for wireless data transmission via Bluetooth, for which the Z3210 module is required.Technische Details: Measuring range: 6 mA to 200 A Frequency range: 15 to 2000 Hz Cable diameter: Up to 40 mm Main functions: Max/Min/AVG/PEAK MAX/PEAK MIN, display hold, auto hold, backlight, auto power save mode, buzzer, event display, comparison function, simple event recording, inrush current measurement Wireless data transmission: Bluetooth ready (Z3210 module required)
CM4002-90
CM4002-90 - AC Leakage Clamp Meter, Bluetooth
The CM4002-90 is a True RMS AC leakage meter with a measuring range of 6mA to 200A and a frequency range of 15 to 2000 Hz. Designed to cover conductors up to 40 mm in diameter, the CM4002 offers a range of advanced functions including Max/Min/AVG/PEAK MAX/PEAK MIN value display, display hold and auto-hold, backlight, automatic power-saving mode, acoustic signal (buzzer), event display, comparator, simple event recording, and inrush current measurement.The CM4002-90 is equipped with the Z3210 module for wireless data transmission via Bluetooth. Technical Details: Measuring range: 6 mA to 200 A Frequency range: 15 to 2000 Hz Cable diameter: Up to 40 mm Key functions: Max/Min/AVG/PEAK MAX/PEAK MIN, display hold, auto-hold, backlight, automatic power-saving mode, buzzer, event display, comparator, simple event recording, inrush current measurement Wireless data transmission: Via Bluetooth with Z3210 module
CM4003
CM4003 - AC Leakage Clamp Meter
The CM4003 is a true RMS AC leakage current meter with a measuring range of 6 mA to 200 A and a frequency range of 15 to 2000 Hz. It is designed for conductors with a diameter of up to 40 mm. The CM4003 offers advanced functions such as Max/Min/AVG/PEAK MAX/PEAK MIN value display, display hold and auto hold, backlight, automatic energy saving mode, acoustic signal (buzzer), event display, comparison function, simple event recording and inrush current measurement.In addition, the CM4003 has a waveform/RMS output function that enables signals to be recorded with a memory recorder. The device is also prepared for wireless data transmission via Bluetooth, for which the Z3210 module is required.Technical details:Measuring range: 6 mA to 200 A Frequency range: 15 to 2000 Hz Cable diameter: Up to 40 mmMain functions: Max/Min/AVG/PEAK MAX/PEAK MIN, display hold, auto hold, backlight, automatic energy saving mode, buzzer, event display, comparison function, simple event recording, inrush current measurementAdditional function: Waveform/RMS output for signal recording with a memory recorderWireless data transmission: Bluetooth ready (Z3210 module required)
CM4003-90
CM4003-90 - AC Leakage Clamp Meter, Bluetooth
The CM4003-90 is a True RMS AC leakage meter with a measuring range of 6mA to 200A and a frequency range of 15 to 2000 Hz. It accommodates conductors up to 40 mm in diameter. The CM4003 offers advanced features such as Max/Min/AVG/PEAK MAX/PEAK MIN value display, display hold and auto-hold, backlight, automatic current saving mode, acoustic signal (buzzer), event display, comparator, simple event recording, and inrush current measurement. In addition, the CM4003 is equipped with a Waveform/RMS output function, allowing the recording of available signals with a memory recorder. The CM4003-90 is bundled with the Z3210 Bluetooth-Module wireless data transmission. Technical Details: Measuring range: 6 mA to 200 A Frequency range: 15 to 2000 HzCable diameter: Up to 40 mmKey functions: Max/Min/AVG/PEAK MAX/PEAK MIN, display hold, auto-hold, backlight, automatic power-saving mode, buzzer, event display, comparator, simple event recording, inrush current measurement Additional feature: Waveform/RMS output for signal recording with a memory recorder Wireless data transmission via Bluetooth using Z3210 module
CM4371-50
CM4371-50 - AC/DC Clamp Multimeter, 600 A
The CM4371-50 is a 600A True RMS AC/DC clamp meter with a basic accuracy of 1.3%. Integrated functions are AC/DC voltage-, resistance-, capacitance-, DC power-measurement, continuity test, diode test, automatic AC/DC detection, pass/fail assessment function of DC A and DC V, max/min/average/PEAK MAX/PEAK MIN value display, low-pass filter function, display value hold, auto hold, backlight, current saving function, signalling device, zero adjustment. With optional accessory P-2000, the DC voltage measuring range can be increased to 2000V. Additional feature: Prepaired for Bluetooth® communication (Z3210 required).
CM4371-90
CM4371-90 - AC/DC Clamp Multimeter, 600 A, Bluetooth
The CM4371-90 is the CM4371-50 bundled with the Z3210 Bluetooth® Module. It is a 600A True RMS AC/DC clamp meter with a basic accuracy of 1.3%. Integrated functions are AC/DC voltage-, resistance-, capacitance-, DC power-measurement, continuity test, diode test, automatic AC/DC detection, pass/fail assessment function of DC A and DC V, max/min/average/PEAK MAX/PEAK MIN value display, low-pass filter function, display value hold, auto hold, backlight, current saving function, signalling device, zero adjustment. Due to the Bluetooth module Z3210 Bluetooth® module and Gennect X mobile app (free download), voltage/current harmonics up to 30th harmonic and THD can be recorded.
With optional accessory P2000, the DC voltage measuring range can be increased to 2000V.
CM4373-50
CM4373-50 - AC/DC Clamp Multimeter, 2000 A
The CM4373-50 is a 2000A True RMS AC/DC clamp meter with a basic accuracy of 1.3%. Integrated functions are AC/DC voltage-, resistance-, capacitance-, DC power-measurement, continuity test, diode test, automatic AC/DC detection, pass/fail assessment function of DC A and DC V, max/min/average/PEAK MAX/PEAK MIN value display, low-pass filter function, display value hold, auto hold, backlight, current saving function, signalling device, zero adjustment. With optional accessory P-2000, the DC voltage measuring range can be increased to 2000V. Additional feature: Ready for Bluetooth® communication (Z3210 required).
CM4373-90
CM4373-90 - AC/DC Clamp Multimeter, 2000 A, Bluetooth
The CM4373-90 is the CM4373-50 bundled with the Z3210 Bluetooth® Module. It is a 2000A True RMS AC/DC clamp meter with a basic accuracy of 1.3%. Integrated functions are AC/DC voltage-, resistance-, capacitance-, DC power-measurement, continuity test, diode test, automatic AC/DC detection, pass/fail assessment function of DC A and DC V, max/min/average/PEAK MAX/PEAK MIN value display, low-pass filter function, display value hold, auto hold, backlight, current saving function, signalling device, zero adjustment. Due to the Bluetooth module Z3210 Bluetooth® module and Gennect X mobile app (free download), voltage/current harmonics up to 30th harmonic and THD can be recorded. With optional accessory P2000, the DC voltage measuring range can be increased to 2000V.
CM4375-50
CM4375-50 - AC/DC Clamp Multimeter, 1000 A
The CM4375-50 is a 1000A True RMS AC/DC clamp meter, designed with a special slim clamp for easy access to tight spaces. It is suitable for use in environments rated CAT III 1000V, CAT IV 600V, and features IP54 protection. The meter provides a comprehensive range of measurement functions, including voltage, current, resistance, frequency, capacitance, inrush current, max/min/avg/peak values, continuity test, diode test, automatic AC/DC detection, DC current, and DC voltage polarity detection, among others. With the optional P-2000 accessory, the DC voltage measuring range can be extended to 2000V. The device is also prepared for Bluetooth communication, with the Z3210 module required for wireless data transmission. Technical Details: Measuring range: 1000A (True RMS AC/DC) Measurement functions: Voltage, current, resistance, frequency, capacitance, inrush current, max/min/avg/peak, continuity test, diode test, automatic AC/DC detection, DC current, DC voltage polarity detection Measurement categories: CAT III 1000V, CAT IV 600V Environmental protection: IP54 Additional features: Bluetooth communication-ready (Z3210 module required) Optional accessory: P2000 (extends DC voltage range to 2000V)
CM4375-90
CM4375-90 - AC/DC Clamp Multimeter, 1000 A, Bluetooth
The CM4375-90 is the CM4375-50 bundled with the Z3210 Bluetooth® Module.
It is a 1000A True RMS AC/DC clamp meter with special slim clamp design to easily get into tight spaces in CAT III 1000V, CAT IV 600V, IP54 environments.
Measurement functions include voltage, current, resistance, frequency, capacitance, inrush current, max/min/avg/peak, continuity test, diode test, automatic AC/DC detection, DC current and DC voltage polarity detection and more.
Measurement category CAT III 1000V, CAT IV 600V. Due to the Bluetooth module Z3210 Bluetooth® module and Gennect X mobile app (free download), voltage/current harmonics up to 30th harmonic and THD can be recorded. With optional accessory P-2000, the DC voltage measuring range can be increased to 2000V.