Clamp Meters

A clamp meter is an electrical test tool that combines a basic digital multimeter with a current sensor. Clamps measure current such as AC current, AC and DC voltage, resistance, continuity, and, with some models, DC current, capacitance, temperature, frequency and more. Due to the hinged jaw, this tool allows the user to clamp the jaws around a wire, cable or other conductor at any point in an electrical system, then measure the current without disconnecting it. True RMS measurements, this tester typically measures to the nearest 10th of a unit making them perfect for electrical work such as repairing, installation and maintenance.

Originally created as a single-purpose test tool, modern clampmeters offer more measurement functions, greater accuracy and sometimes specialised measurement features. Today’s clamp meters include most of the basic functions of a digital multimeter, such as the ability to measure voltage, continuity and resistance.

Who uses them?

    Industrial maintenance technicians

    Control technicians

    Electricians – in-house and contractors

    Facilities, building maintenance and HVAC technicians

    Service organisations

What are they used on?

    Industrial equipment

    Industrial controls

    Electrical systems

    Commercial/industrial HVAC

Why are Clamp meters so popular?

    Safety: Clamp meters allow electricians to bypass the old-school method of cutting into a wire and inserting a meter’s test leads into the circuit to take an inline current measurement. The jaws of a clamp meter do not need to touch a conductor during a measurement.

    Convenience: During measurement, it is not necessary to shut off the circuit carrying current—a large boost in efficiency.

They are primarily used for:

    Service: Repair existing systems on an as-needed basis.

    Installation: Troubleshooting installation problems, perform final circuit tests, and supervise apprentice electricians while installing electrical equipment.

    Maintenance: Perform scheduled and preventative maintenance and system troubleshooting.

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Description Price Absolute Maximum AC Current Measurement Absolute Maximum DC Current Measurement Absolute Maximum AC Voltage Measurement Absolute Maximum DC Voltage Measurement Absolute Maximum Resistance Measurement Connectivity Model Number AC Current Measurement Resolution DC Current Measurement Resolution Best DC Current Accuracy Clamp Meter Type Best AC Current Accuracy Best AC Voltage Accuracy Best DC Voltage Accuracy
RS Stock No. 794-3086
Mfr. Part No.LH41A
40A ac 40A dc - - - - LH41A 1mA ac 1mA dc ±1.3% + 5 Digits Current ±1.3% + 5 Digits - -
RS Stock No. 794-3077
Mfr. Part No.ACD-10 PLUS
600A ac - 600V ac 600V dc 40MΩ - ACD-10 PLUS - - - Crest Factor ±1.5% + 8 Digits ±2% + 5 Digits ±1% + 4 Digits
RS Stock No. 794-3068
Mfr. Part No.ACD-20SW
400A ac - 600V ac 600V dc 40MΩ - ACD-20SW 10mA ac - - Diode ±2% + 6 Digits ±1.5% + 5 Digits ±0.5% + 2 Digits
RS Stock No. 411-734
Mfr. Part No.AC68C
600A ac 600A dc 600V ac 600V dc 4kΩ - AC68C 100mA ac 100mA dc ±2% + 5 Digits Continuity, Current, Frequency, Resistance, Voltage ±2% +5 digits ±1.2% + 5 Digits ±0.75% + 2 Digits
RS Stock No. 794-3070
Mfr. Part No.ACD-14 PLUS
600A ac - 600V ac 600V dc 40MΩ - ACD-14 PLUS - - - Diode ±1.5% + 8 Digits ±2% + 5 Digits ±1% + 4 Digits
RS Stock No. 794-3074
Mfr. Part No.ACDC-3400 IND
1kA ac 1kA dc 750V ac 1000V dc 66MΩ - ACDC-3400 IND - - ±3% + 5 Digits Diode ±3.5% + 10 Digits ±1.5% + 8 Digits ±0.5% + 2 Digits