Measuring clamps
Clamp-on meters measure current, voltage and sometimes power without interrupting the circuit. Using a Hall-effect sensor or a current transformer, they detect the magnetic field generated by the conductor and convert it into a proportional electrical signal. In maintenance, they facilitate rapid checking of circuits, circuit-breakers and distribution systems. In production, they enable functional checks and the detection of load anomalies. Modern clamps also measure AC/DC voltage, frequency, power factor and total harmonic distortion (THD). Accuracy is up to ± (1 % + 2 digits), with measurement ranges from 1 mA to 3,000 A depending on the model. TRMS versions ensure reliable measurement even on distorted signals. Bluetooth and USB interfaces facilitate measurement transmission and automatic reporting. Insulated to CAT III or CAT IV, they meet IEC 61010 safety requirements.
It's a practical, accurate device for measuring current and diagnosing electrical installations in complete safety.
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SEFA-TE65-02
SEFELEC
The SEFELEC SEFA-TE65-02 is a high-voltage measurement probe designed for testing dielectric strength and insulation during electrical safety tests. Fitted with a retractable protection, it enables measurements to be carried out in complete safety with SEFELEC testers. Its 2-metre cord makes it practical for use in the laboratory, in production or in the field.
80I-110S
FLUKE
10 A and 100 A AC/DC current clamp, 100 KHz bandwidth, 9 V battery operation.
CA6417
CHAUVIN ARNOUX
Loop ohmmeter clamp for earth monitoring with OLED display and Bluetooth.
AMPFLEX-MA193-250
CHAUVIN ARNOUX
MiniFlex MA193 250 mm flexible sensor for AC devices.
AMPFLEX-MA193-350
CHAUVIN ARNOUX
MiniFlex MA193 350mm flexible sensor for various devices.
41800A
KEYSIGHT / AGILENT / HP
Active RF probe with wide bandwidth from 5Hz to 500MHz.
N2774A
KEYSIGHT / AGILENT / HP
DC-50MHz active current clamp, 15A and 30A peak, rise time 7ns.
3287
HIOKI
Pince multimètre AC/DC TRMS, 10 A à 100 A, ultra fine pour espaces réduits.
U1191A
KEYSIGHT / AGILENT / HP
AC 400 A current clamp with 6000 point display and RMS converter.
U1192A
KEYSIGHT / AGILENT / HP
U1192A AC current clamp, measures up to 400 A, 6000-dot display.
U1193A
KEYSIGHT / AGILENT / HP
TRMS AC current clamp from 60 to 600 A, ideal for accurate measurements.
U1194A
KEYSIGHT / AGILENT / HP
U1194A current clamp with 6000-point display, AC/DC measurement.
FLUKE-771
FLUKE
Fluke 771 multimeter clamp with 0.2 % accuracy and signal measurement from 4 to 20 mA.
Practical questions about Measuring clamps
01
What are measuring pliers used for?A clamp meter is used to measure a current without opening the circuit. It uses a magnetic sensor to detect the field created by the passage of the current, making the measurement fast, safe and suitable for installations in operation.
02
What is the difference between an AC clamp and an AC/DC clamp?AC clamps only measure alternating currents via a current transformer. AC/DC clamps use a Hall-effect sensor to analyse DC currents as well. AC/DC models are essential for switch-mode power supplies, embedded systems or batteries.
03
What criteria should I look for when choosing the right pliers?Consideration should be given to current range, accuracy, safety class (CAT), bandwidth, jaw size and ability to measure distorted or pulsed signals. Compatibility with the measuring device (multimeter, oscilloscope, power meter) is also essential.
04
Is it possible to measure low currents with a clamp meter?Yes, but only with models designed for low currents. Standard clamps often lack sensitivity below a few amperes. Low-noise or wide-bandwidth clamps are preferred for precision measurements or fast signals.
05
Why is bandwidth important?Too low a bandwidth can smooth or distort signals. For switch-mode power supplies, controlled motors or fast electronic circuits, a wide-band clamp is needed to measure fast current variations and high-frequency components correctly.
