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Clamp Meters

A clamp meter also known as a clamp-on meter or tong tester, is an electrical test tool that combines a basic digital multimeter with a current sensor. Clamp meters measure current, voltage, resistance, continuity, and, with some models, capacitance, temperature, frequency, and more and are considered essential tools for electrical diagnostics, system maintenance and safety assurance,

Clamp meters have a hinged jaw allowing users to clamp onto a wire or cable at any point in an electrical system to measure the current without disconnecting it. These current clamps are extremely popular due to safety reasons as they provide a non-contact method of measuring current, eliminating the need for direct contact with live wires. They identify issues when installations occur and are cost effective for ongoing tester, maintenance, and service requirements. You can find out more in our clamp meters guide.

Our range of clamp meters including calibrated clamp meters, have been sourced from leading brands such as: Beha-Amprobe, Chauvin Arnoux, Fluke, FLIR, Keysight Technologies, Megger, RS PRO and many more. Our product range is easy to browse and supported with technical information to ensure you choose the right solution for your needs. RS has technical advisers on hand to provide you information not only on the product, but also on our calibrated services.

What are clamp meters used for?

Measuring Current - AC and DC Current, and high currents that multimeters cannot measure safely
Voltage Measurement
Resistance Testing
Continuity Testing - checks for the integrity of electrical connections
Frequency Measurement - advanced clamp meters can measure the frequency of an electrical signal.
Earth Leakage Testing - specialised clamp meters detect small leakage currents in circuits, ensuring safety and compliance with regulations.
Troubleshooting Electrical Systems - ideal for identifying overloads, shorts, or imbalanced circuits in industrial, commercial, or residential settings.

How to test for earth leakage

Testing for earth leakage involves using specific tools such as an earth leakage clamp meter to measure the unintended current flow from a live conductor to the earth.

Set the earth leakage clamp meter to the lowest AC current range for precision.
Clamp the meter around all live conductors, including neutral (not the earth wire). This measures the net current flow.
Read the leakage current displayed. Any significant value (above 30mA in residential setups) indicates a potential issue.

Popular Clamp Meters

Why would you need a clamp meter?

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 inefficiency.
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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In Stock RS PRO RS380 Clamp Meter 400 A 600 V dc 600 V ac CAT III Non-Contact Voltage Detector RS Stock No. 123-1935 Subtotal (1 unit) £38.98(exc. VAT) £38.98/unit Quantity	True RMS	-	Clamp Meter	-	-	100mΩ	-	600V ac	-	600V dc	-	20MΩ	-	RS380	-	-	-	-	±2.5 % rdg + 5 Digits	10mA	±1.5 % rdg + 8 Digits	100V ac	AC Current Clamp Meter	-	-	±1.5 % rdg + 2 Digits	100 V dc	23mm	5°C	±1 % rdg + 4 Digits	±(3.0% ±5°C)	1°C	-	40°C	-	230mm	82mm	RoHS	230g	40mm	-	AC Voltage, Temperature, Diode, Resistance, AC Current, Continuity, DC Voltage	-
In Stock RS PRO Clamp Meter, 1000 A 1000 A 1000 V dc 1000 V ac Raised Countersunk Non-Contact Voltage Detector RS Stock No. 296-511 Subtotal (1 unit) £137.84(exc. VAT) £137.84/unit Quantity	True RMS	-	Clamp Meter	-	1000A	40MΩ	-	1000V ac	-	1000V dc	-	40mΩ	-	-	-	-	-	-	±3 % rdg + 8 Digits	-	1.2 %	-	Digital	3 %	1000A	0.8 %	1000 V dc	42mm	0°C	-	-	1200°C	-	40°C	-	28mm	225mm	EN 61326-1	260g	82mm	-	AC, DC	-
In Stock RS PRO Clamp Meter, 80 A 80 A 600 V dc 600 V ac CAT III RS Stock No. 146-9096 Subtotal (1 unit) £104.35(exc. VAT) £104.35/unit Quantity	True RMS	-	Clamp Meter	-	80A	100mΩ	-	600V ac	-	600V dc	-	40MΩ	-	-	-	-	-	-	±3 % rdg + 8 Digits	1mA	±2 % rdg + 5 Digits	100V ac	DC Clamp Meter, Mini AC	±3 % rdg + 8 Digits	1mA	±1.5 % rdg + 2 Digits	100 V dc	19mm	5°C	±1.5 %	±2°C	0.1°C	-	40°C	-	210mm	70mm	No	200g	37mm	-	AC Voltage, AC Current, DC Current, Frequency, Duty Cycle, Continuity, Temperature, Capacitance, DC Voltage, Resistance, Diode	-
In Stock RS PRO RS330 Clamp Meter 400 A 600 V dc 600 V ac CAT III RS Stock No. 123-1936 Subtotal (1 unit) £32.78(exc. VAT) £32.78/unit Quantity	True RMS	-	Clamp Meter	-	-	-	-	600V ac	-	600V dc	-	20MΩ	-	RS330	-	-	-	-	±2 % rdg + 4 Digits	1mA	±1.5 % rdg + 3 Digits	100V ac	AC Current Clamp Meter	-	-	±1.2 % rdg + 3 Digits	100 V dc	23mm	-10°C	±3 % rdg + 5 Digits	-	-	-	50°C	-	205mm	70mm	RoHS	200g	37mm	-	DC Voltage, AC Voltage, Diode, Resistance, AC Current, Continuity	-
In Stock RS PRO ICM139R Clamp Meter, 1000 A dc 1000 A 1000 V dc 750 V ac CAT IV, CAT III Non-Contact Voltage Detector RS Stock No. 123-3227 Subtotal (1 unit) £255.60(exc. VAT) £255.60/unit Quantity	True RMS	-	Clamp Meter	-	1000A dc	100mΩ	-	750V ac	-	1000V dc	-	400Ω	-	ICM139R	-	-	-	-	±1.5 % rdg + 5 Digits	100mA	±1 % rdg + 5 Digits	100mV ac	AC/DC Clamp Meter	±1 % rdg + 3 Digits	100mA	±0.7 % rdg + 2 Digits	100 mV dc	51mm	0°C	±1 % rdg + 3 Digits	-	-	-	50°C	-	275mm	90mm	IEC 610101, RoHS Certificate of	420g	51mm	-	Diode, Frequency, Continuity, Resistance, AC Voltage, AC Current, DC Current, DC Voltage	-
In Stock RS PRO Clamp Meter CAT III RS Stock No. 360-187 Subtotal (1 unit) £64.41(exc. VAT) £64.41/unit Quantity	-	-	Clamp Meter	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	AC/DC Clamp Meter	-	-	-	-	-	5°C	-	-	-	-	40°C	-	197mm	40mm	-	183g	70mm	-	AC Current, AC Voltage, Capacitance, Continuity, DC Current, DC Voltage, Diode, Duty Cycle, Frequency, Resistance	-
In Stock RS PRO ICMA1 Clamp Meter, 300 A 300 A 600 V ac CAT III Non-Contact Voltage Detector RS Stock No. 123-3256 Subtotal (1 unit) £107.50(exc. VAT) £107.50/unit Quantity	True RMS	-	Clamp Meter	-	300A	-	-	600V ac	-	-	-	-	-	ICMA1	-	-	-	-	±1.5 % rdg + 5 Digits	10mA	±0.5 % rdg + 3 Digits	-	AC/DC Clamp Meter	±1.5 % rdg + 5 Digits	10mA	-	-	25mm	0°C	-	-	-	-	50°C	-	147mm	60mm	EN610102032, EN613261, EN610101, EN610102030	140g	31mm	-	Low Pass Filter, DC Current, AC Current, Inrush Current	-
In Stock RS PRO Clamp Meter CAT III UKAS RS Stock No. 360-190 Subtotal (1 unit) £139.41(exc. VAT) £139.41/unit Quantity	-	-	Clamp Meter	-	-	-	-	-	-	-	-	-	-	-	UKAS	-	-	-	-	-	-	-	AC/DC Clamp Meter	-	-	-	-	-	5°C	-	-	-	-	40°C	-	197mm	40mm	-	183g	70mm	-	AC Current, AC Voltage, Capacitance, Continuity, DC Current, DC Voltage, Diode, Duty Cycle, Frequency, Resistance	-
In Stock RS PRO RS330 Clamp Meter 400 A 600 V dc 600 V ac CAT III RSCAL RS Stock No. 123-1983 Subtotal (1 unit) £85.78(exc. VAT) £85.78/unit Quantity	True RMS	-	Clamp Meter	-	-	-	-	600V ac	-	600V dc	-	20MΩ	-	RS330	RSCAL	-	-	-	±2 % rdg + 4 Digits	1mA	±1.5 % rdg + 3 Digits	100V ac	AC Current Clamp Meter	-	-	±1.2 % rdg + 3 Digits	100 V dc	23mm	-10°C	±3 % rdg + 5 Digits	-	-	-	50°C	-	205mm	70mm	RoHS	200g	37mm	-	DC Voltage, AC Voltage, Diode, Resistance, AC Current, Continuity	-
In Stock RS PRO RS380 Clamp Meter 400 A 600 V dc 600 V ac CAT III Non-Contact Voltage Detector RSCAL RS Stock No. 123-1976 Subtotal (1 unit) £91.98(exc. VAT) £91.98/unit Quantity	True RMS	-	Clamp Meter	-	-	100mΩ	-	600V ac	-	600V dc	-	20MΩ	-	RS380	RSCAL	-	-	-	±2.5 % rdg + 5 Digits	10mA	±1.5 % rdg + 8 Digits	100V ac	AC Current Clamp Meter	-	-	±1.5 % rdg + 2 Digits	100 V dc	23mm	5°C	±1 % rdg + 4 Digits	±(3.0% ±5°C)	1°C	-	40°C	-	230mm	82mm	RoHS	230g	40mm	-	AC Voltage, Temperature, Diode, Resistance, AC Current, Continuity, DC Voltage	-
In Stock RS PRO Clamp Meter CAT IV RS Stock No. 360-212 Subtotal (1 unit) £105.70(exc. VAT) £105.70/unit Quantity	True RMS	-	Clamp Meter	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	AC/DC Clamp Meter	-	-	-	-	-	5°C	-	-	-	-	40°C	-	230mm	40mm	-	315g	76mm	-	-	-
In Stock RS PRO ICM134 Clamp Meter, 4000 A 600 A 1000 V dc 750 V ac CAT III, CAT II Non-Contact Voltage Detector RS Stock No. 123-3228 Subtotal (1 unit) £197.69(exc. VAT) £197.69/unit Quantity	-	-	Clamp Meter	-	4000A	-	-	750V ac	-	1000V dc	-	40MΩ	-	ICM134	-	-	-	-	±1.9 % rdg + 1 A	100mA	±1.5 % rdg + 5 Digits	1mV ac	HVAC Clamp Meter	400.0 μA: ±(1%+2 dgt)	-	±0.9 % rdg + 2 Digits	1 mV dc	32mm	0°C	±0.7% + 2 Digits	-40.0°C to 0.0°C: 1% ± 4°C, 32°F to 750°F: 1% ± 6°F, 0.0°C to 400.0°C: 1% ± 3°C, 750°F to 1000°F: 2% ± 8°F °C, -40°F to 32°F: 1% ± 8°F	-	-	50°C	-	-	-	IEC 610101:2001, EN 613261	-	-	-	AC Voltage, DC Current, DC Voltage, Resistance, Diode, Capacitance, Temperature, AC Current, Continuity	-
In Stock RS PRO ICM30R Clamp Meter, 300 A 999 A 600 V dc 999 V ac CAT III Non-Contact Voltage Detector UKAS RS Stock No. 123-3381 Subtotal (1 unit) £231.18(exc. VAT) £231.18/unit Quantity	True RMS	-	Clamp Meter	-	300A	1kΩ	-	999V ac	-	600V dc	-	40MΩ	-	ICM30R	UKAS	-	-	-	±1 % rdg + 3 Digits	10mA	±1.5 % rdg + 5 Digits	100V ac	AC/DC Clamp Meter	±1 % rdg + 2 Digits	10mA	±0.5 % rdg + 2 Digits	100 V dc	22mm	0°C	±5 % rdg + 2.5 Digits	-	-	-	50°C	-	27mm	192mm	RoHS	205g	66mm	-	AC Current, AC Voltage, DC Voltage	-
In Stock RS PRO DT-388 Clamp Meter 3000 A ac CAT III, CAT IV RS Stock No. 201-0209 Subtotal (1 unit) £128.22(exc. VAT) £128.22/unit Quantity	True RMS	-	Clamp Meter	-	-	-	-	-	-	-	-	-	-	DT-388	-	-	-	-	±3 % rdg + 8 Digits	-	-	-	AC Flexible Clamp Meter	-	-	-	-	-	-20°C	-	-	-	-	60°C	-	-	-	EN613261, EN610101, EN610102032	-	-	-	AC Current	-
In Stock RS PRO IPM245F Clamp Meter, 1 kA 1 kA 1000 V dc 1000 V ac CAT IV, CAT III Non-Contact Voltage Detector RS Stock No. 124-1963 Subtotal (1 unit) £375.87(exc. VAT) £375.87/unit Quantity	True RMS	-	Clamp Meter	-	1kA	100mΩ	-	1000V ac	-	1000V dc	-	100kΩ	-	IPM245F	-	-	-	-	±1.5 % rdg + 5 Digits	100mA	±1 % rdg + 5 Digits	100mV ac	Power Clamp Meter	±1.5 % rdg + 5 Digits	100mA	±0.7 % rdg + 2 Digits	100 mV dc	27mm	0°C	±1 % + 3 Digits	±1 % + 1 °C	0.1°C	-	50°C	-	257mm	87.5mm	IEC 610101, RoHS Certificate of	470g	50.5mm	-	Power Factor, DC Voltage, Frequency, DC Current, AC Current, Total Harmonic Distortion, Continuity, Temperature, Harmonics, AC Voltage, Diode, Power, Resistance, Capacitance	-
In Stock RS PRO ICM30R Clamp Meter, 300 A 999 A 600 V dc 999 V ac CAT III Non-Contact Voltage Detector RS Stock No. 123-3252 Subtotal (1 unit) £156.18(exc. VAT) £156.18/unit Quantity	True RMS	-	Clamp Meter	-	300A	1kΩ	-	999V ac	-	600V dc	-	40MΩ	-	ICM30R	-	-	-	-	±1 % rdg + 3 Digits	10mA	±1.5 % rdg + 5 Digits	100V ac	AC/DC Clamp Meter	±1 % rdg + 2 Digits	10mA	±0.5 % rdg + 2 Digits	100 V dc	22mm	0°C	±5 % rdg + 2.5 Digits	-	-	-	50°C	-	27mm	192mm	RoHS	205g	66mm	-	AC Current, AC Voltage, DC Voltage	-
In Stock RS PRO Clamp Meter, 1000 A 1000 A 1000 V dc 1000 V ac Raised Countersunk Non-Contact Voltage Detector RSCAL RS Stock No. 296-512 Subtotal (1 unit) £190.84(exc. VAT) £190.84/unit Quantity	True RMS	-	Clamp Meter	-	1000A	40MΩ	-	1000V ac	-	1000V dc	-	40mΩ	-	-	RSCAL	-	-	-	±3 % rdg + 8 Digits	-	1.2 %	-	Digital	3 %	1000A	0.8 %	1000 V dc	42mm	0°C	-	-	1200°C	-	40°C	-	28mm	225mm	EN 61326-1	260g	82mm	-	AC, DC	-
In Stock RS PRO ICM2000N Clamp Meter, 2.5 kA 2.1 kA 600 V dc 600 V ac CAT III RS Stock No. 123-2206 Subtotal (1 unit) £329.66(exc. VAT) £329.66/unit Quantity	True RMS	-	Clamp Meter	-	2.5kA	100mΩ	-	600V ac	-	600V dc	-	40MΩ	-	ICM2000N	-	-	-	-	±1.5 % rdg + 5 Digits	100mA	±1.5 % rdg + 5 Digits	100V ac	AC/DC Clamp Meter	±1.5 % rdg + 3 Digits	100mA	±1.5 % rdg + 3 Digits	100 V dc	55mm	0°C	±1.5 % rdg + 3 Digits	-	-	-	40°C	-	271mm	112mm	RoHS	647g	46mm	-	AC Voltage, Resistance, DC Current, DC Voltage, AC Current, Frequency	-
In Stock RS PRO Clamp Meter CAT IV RSCAL RS Stock No. 360-213 Subtotal (1 unit) £158.70(exc. VAT) £158.70/unit Quantity	True RMS	-	Clamp Meter	-	-	-	-	-	-	-	-	-	-	-	RSCAL	-	-	-	-	-	-	-	AC/DC Clamp Meter	-	-	-	-	-	5°C	-	-	-	-	40°C	-	230mm	40mm	-	315g	76mm	-	-	-
In Stock RS PRO Clamp Meter CAT IV UKAS RS Stock No. 360-215 Subtotal (1 unit) £180.70(exc. VAT) £180.70/unit Quantity	True RMS	-	Clamp Meter	-	-	-	-	-	-	-	-	-	-	-	UKAS	-	-	-	-	-	-	-	AC/DC Clamp Meter	-	-	-	-	-	5°C	-	-	-	-	40°C	-	230mm	40mm	-	315g	76mm	-	-	-