Clamp Meters
GAO’s electrical clamp meters are a type of electrical test instrument used to measure electrical current without the need to disconnect the circuit or make physical contact with the conductors. Our clamp meters work by using a magnetic clamp that can be opened and closed around the conductor, which induces a magnetic field in the clamp. This field is then converted into a measurable electrical signal, which is used to determine the current flowing through the conductor. They are particularly useful in situations where the current cannot be easily measured using other types of test instruments, such as when the circuit is live or the conductors are difficult to access.

GAO’s electrical clamp meters are composed of clamp, current transformer, measurement circuitry, display, function selection and range switches, power source, and input jacks.

The alternative names of a clamp meter include current clamp, amp clamp, ammeter clamp, current probe, tong tester, current sensor, AC/DC clamp meter, current meter, clamp-on ammeter, current tong, clamp-on current meter, clamp-on meter, jaw clamp meter, clamp-on amp meter, AC/DC current clamp meter, ampere clamp meter, non-contact ammeter, hall effect clamp meter and magnetic current meter.

Showing all 79 results

GAOTek AC or DC Clamp Meter

SKU: GAOTek-CM-133
GAOTek AC or DC Clamp Meter measures very low and very high resistance with this True RMS AC or DC clamp meter.

GAOTek AC or DC Clamp Meter

SKU: GAOTek-CM-139
This AC or DC Clamp Meter has 1000 μF capacitance range, 6000 Ω resistance range, 1000 V voltage range, 1.26 in jaw opening, and 600 A current range.

GAOTek AC/DC Clamp Meter

SKU: GAOTek-CM-101
GAOTek AC/DC clamp meter is a high-quality AC/DC clamp meter manufactured in Japan.

GAOTek Clamp Digital Flow Meter Water

SKU: GAOTek-CM-145
This clamp Digital Flow Meter Water has ±1% accuracy, 0.6 in to 236.22 in tube inner diameter, 10000 ppm turbidity, and 85% RH humidity.

GAOTek Clamp Electromagnetic Flow Meter

SKU: GOATek-CM-161
This Clamp Electromagnetic Flow Meter has 4 mA to 20 mA output signal, ±0.5% precision class, load capacity of ≤500 Ω, and 0% to 90% humidity.

GAOTek Clamp Flow Meter For Arduino

SKU: GAOTek-CM-141
This Clamp Flow Meter for Arduino has 0 m/s to ±10 m/s measuring range, >±1% accuracy, 4 mA to 20 mA single output, and 15 hrs to 20 hrs power supply.

GAOTek Clamp Liquid Control Flow Meter

GAOTek Clamp liquid control flow meter is a speed-type flow meter based on torque balance.

GAOTek Clamp Magnetic Flow Meter

SKU: GAOTek-CM-142
This Clamp Magnetic Flow Meter has 10 W power consumption, 0.2% repeatability, -4 °F to 140 °F ambient temperature, and 4 mA to 20 mA analog output.

GAOTek Clamp Meter Digital Multimeter

SKU: GAOTek-CM-102
GAOTek clamp meter digital multimeter is a 3 3/4 digits (4000 counts) auto range digital leakage current clamp meter

GAOTek Clamp On Ultrasonic Flow Meter

SKU: GAOTek-CM-112
Technical Specifications Product name  Ultrasonic flowmeter  Linearity  0.5 %  Repeatability  0.2 %  Accuracy  ±1 % of reading at rates>0.2 mps

GAOTek Clamping Force Meter

SKU: GAOTek-CM-157
GAOTek clamping force meter is a digital force gauge with a compact size and high accuracy.

GAOTek Current Leakage High Voltage Clamp Current Meter

SKU: GAOTek-CM-104
GAOTek current leakage high voltage clamp current meter is a high voltage clamp current meter designed for measuring current leakage in electrical systems.

GAOTek DC Or AC Clamp Meter

SKU: GAOTek-CM-144
GAOTek DC or AC clamp meter can be used in most industrial and commercial applications where nonlinear loads distort current or voltage waveform.

GAOTek DC Or AC Clamp Meter

SKU: GAOTek-CM-147
This DC or AC clamp meter has 0.91 in jaw opening, 10 MΩ input impedance, 10 mA current consumption, and 15 mA power consumption.

GAOTek Digital 3 Phase Harmonic Power Clamp Meter

SKU: GAOTek-CM-108
GAOTek digital 3 phase harmonic power clamp meter is a sophisticated and versatile instrument designed for power quality analysis in three-phase electrical systems.

GAOTek Digital AC DC Earth Multi-Meter Clamp Meter For Test Leakage Current And Ground Resistance

SKU: GAOTek-CME-108
GAOTek Digital AC DC Earth Multi-meter Clamp Meter for Test Leakage Current and Ground Resistance is designed to detect, record, and measure earth leakage currents with a resolution down to 0.01mA.

GAOTek Digital Clamp Meter

SKU: GAOTek-CM-149
This Digital Clamp Meter has a current range of AC DC 40 A, 32 °F to 122 °F temperature range, and AC 40 Hz to 400 Hz frequency range

GAOTek Digital Clamp Multimeter

SKU: GAOTek-CM-143
This Digital Clamp Multimeter has 0 A to 600 A measuring current range, 0 K to 60 K measuring resistance range, 1000 uF measuring capacitance range.

GAOTek Digital Clamp Multimeter Current AC/DC Voltage Resistance Earthing Current Testers

SKU: GAOTek-CM-103
GAOTek digital clamp multimeter current AC/DC voltage resistance earthing current testers is a versatile digital clamp multimeter that offers a wide range of measurement capabilities.

GAOTek Digital Clamp Phase Meter

SKU: GAOTek-FPM-104
GAOTek Digital Clamp Phase Meter is an electronic instrument used to measure the phase difference between two alternating current (AC) signals.

GAOTek Digital Clamp-on Sensor Handheld Portable Ultrasonic Flow Meter

SKU: GAOTek-CM-109
GAOTek digital clamp-on sensor handheld portable ultrasonic flow meter is a cutting-edge instrument used for non-invasive flow measurement in various fluid systems.

GAOTek Digital Electromagnetic Flow Meter

SKU: GAOTek-CM-162
GAOTek digital electromagnetic flow meter of intelligent submersible flow meter is a high-performance, high-reliability flowmeter for measuring the volumetric flow of conductive liquids and slurries in closed conduits.

GAOTek Digital Hook Clamp Meter TRMS Wireless

SKU: GAOTek-CME-102
GAOTek Digital Hook Clamp Meter TRMS Wireless is a versatile and advanced measurement tool designed for electrical professionals.

GAOTek Digital Wireless H/L Voltage Clamp Current Meter.

SKU: GAOTek-CME-107
GAOTek Digital Wireless H/L Voltage Clamp Current Meter is a versatile measurement tool designed to accurately measure current in electrical systems.

GAOTek Double Clamp Ground Resistance Meter

SKU: GAOTek-CM-160
This Double Clamp Ground Resistance Meter has 128 Hz or 111 Hz Frequency, 20 MΩ insulation resistance and Soil Resistivity of 0.00 Ωm to 9000 kΩm

GAOTek Dual-Clamp Digital Phase Meter

SKU: GAOTek-CM-120
GAOTek Dual-clamp digital phase meter is a multi-functional instrument developed specially for on-site testing.

GAOTek Earth Resistivity Clamp Meter

SKU: GAOTek-CM-152
This earth resistivity clamp meter has testing voltage of 0 V to 600 V, resistance range of 0.00 Ω to 1800 Ω, and current range of 0.000 mA to 50 A.

GAOTek Electric Test Digital Earth Resistance Clamp Meter

SKU: GAOTek-CM-107
GAOTek electric test digital earth resistance clamp meter is widely applied in ground resistance measurement, loop resistance measurement in fields such as electric power, telecommunications, meteorology, oil field, architecture, and industrial electrical equipment, etc.

GAOTek Electrical Energy Harmonics Power Quality Pad Analyzer With Clamp Meter

SKU: GAOTek-CM-111
GAOTek handheld Power Quality Analysis Pad has features which make it ideal for troubleshooting, compliance testing and energy audits.

GAOTek Factory Clamp Ultrasonic Flow Meter for Coal Water

SKU: GAOTek-CM-115
GAOTek ultrasonic flow meter is designed to measure the fluid velocity of liquid within a closed conduit.

GAOTek FC True RMS Clamp Meter

SKU: GAOTek-CM-132
GAOTek FC True RMS Clamp Meter Ideal for a wide range of current measurement situations, this True RMS clamp meter also comes equipped with the iFlex flexible current probe, which increases flexibility and measures awkward-sized conductors

GAOTek Flow Meter Clamp

SKU: GAOTek-CM-148
This Flow Meter Clamp has 85 V to 264 V AC power supply, fluid temperature of ≤320 °F, 2 in to 27.6 in pipe diameter, and 1% accuracy.

GAOTek Ground Earth Tester Clamp Meter

SKU: GAOTek-CM-138
GAOTek Ground Earth Tester Clamp Meter is widely used in the grounding resistance measurement of power, telecommunications, meteorology, oilfield, construction and industrial and electrical equipment.

GAOTek Ground Resistance Clamp Meter

SKU: GAOTek-CM-137
GAOTek Ground Resistance Clamp Meter mainly uses frequency large current three-pole measurements to test the ground network earth resistance.

GAOTek Ground Testing Clamp Meter

SKU: GAOTek-CM-134
GAOTek Ground Testing Clamp Meters can quickly and safely measure the grounding system without disconnecting circuit ground lines or needing auxiliary electrodes.

GAOTek Handheld Digital Clamp Meter Three Phase Voltammetry

SKU: GAOTek-CM-114
Technical Specifications Working power supply built-in 8.4 V/2.6 AH lithium battery Voltage range 1 V to 500 V 0.5 %

GAOTek Handheld Digital Double Clamp Digital Phase Meter

SKU: GAOTek-CM-113
GAOTek Double Clamp Digital Phase Meter is specially designed for testing voltage, current and phase onsite, it is in high-precision, low price, portable hand-held, dual-channel input measuring product.

GAOTek High Resolution DC AC Clamp Meter

SKU: GAOTek-CME-104
GAOTek high-resolution DC AC Clamp Meter is a versatile and reliable measurement tool used to measure both direct current (DC) and alternating current (AC) in various electrical systems.

GAOTek Intrinsically Mini Digital Clamp Meter

SKU: GAOTek-CM-150
This intrinsically mini digital clamp meter has power supply of 1.5 V, 3 AAA battery, DC voltage of 200 MV to 1000 V, and AC current of 2 A to 4 A. 

GAOTek Maintenance Clamp Meter

SKU: GAOTek-CM-153
This maintenance clamp meter has a measuring current range of 0 A to 1000 A, maximum AC DC current of 1000 A, and measuring voltage range of 1000 V.

GAOTek Milliamperes Process Clamp Meter

SKU: GAOTek-CM-151
GAOTek milliamperes process clamp meter can measure mA signals without breaking the loop.

GAOTek Multifunction Three Phase True RMS Power Quality and Harmonics Analysis Clamp Meter

SKU: GAOTek-CME-101
GAOTek multifunction Three Phase True RMS Power Quality and Harmonics Analysis Clamp Meter is a portable intelligent power/harmonic measuring instrument.

GAOTek New Energy Vehicle Electric High-speed Railway AC/DC Leakage Current Digital Display Clamp Meter

SKU: GAOTek-CM-110
GAOTek new energy vehicle electric high-speed railway AC/DC leakage current digital display clamp meter is a specialized digital display clamp ammeter designed for measuring AC/DC leakage currents in new energy vehicles and electric high-speed railways.

GAOTek Portable Clamp on Flowmeter

SKU: GAOTek-CM-158
GAOTek portable clamp on flowmeter uses the time difference principle of ultrasonic wave propagation in the medium to measure the flow rate.

GAOTek Portable Flow Meter Clamp on Flow Meter with High Temperature Sensor Ultrasonic Water Heat Meter

SKU: GAOTek-CM-106
GAOTek portable flow meter clamp on flow meter with high temperature sensor ultrasonic water heat meter is a portable flow meter and clamp-on flow meter designed for non-invasive flow measurement in various applications

GAOTek Remote Display True RMS AC/DC Clamp Meter

SKU: GAOTek-CME-105
GAOTek Remote Display True RMS AC/DC Clamp Meter is a versatile electrical testing tool designed to measure both alternating current (AC) and direct current (DC) with accuracy and convenience.

GAOTek RMS AC/DC Power Clamp With VFD Mode Digital Clamp Meter

SKU: GAOTek-CME-103
GAOTek RMS AC/DC Power Clamp with VFD Mode digital clamp meter is engineered with advanced power analysis and variable frequency drive (VFD) filtering functions required by electrical troubleshooters.

GAOTek RMS Current Clamp Meter

SKU: GAOTek-CME-109
GAOTek RMS Current Clamp Meter is a versatile and reliable measuring instrument used for electrical current measurements.

GAOTek TES True RMS Dc Or Ac Clamp Meter

SKU: GAOTek-CM-155
This TES true RMS DC or AC clamp meter has measuring voltage range of 0 V to 400 V, 15 mA power consumption, and AC or DC 0 A to 30 A current range. 

GAOTek Three Phase Electric Meter Phasing Tester

SKU: GAOTek-ET-103
GAOTek Three Phase Electric Meter Phasing Tester has the following advantages fundamental phase measurement endows it with strong anti-interference ability; displays three-phase voltage and current waveform in real time, 2 to 50 times harmonic ratio and histogram, and analyses power quality.

GAOTek Tri Clamp Meter

SKU: GAOTek-CM-140
This Tri Clamp Meter has 87.02 PSI to 232.06 PSI nominal pressure, ±0.5% accuracy, DC 24 V power supply, and 0.4 in to 7.9 in nominal diameter.

GAOTek Tri-Clamp Handheld Digital Clamp Ultrasonic Flow Meter

SKU: GAOTek-CM-118
Features • Multiple functions, with calculating, control, transmitting and other functions • Match with various weir tank. Right-angle, triangle weir,

GAOTek True RMS Ac Or Dc Clamp Meter

SKU: GAOTek-CM-154
GAOTek true RMS AC or DC clamp meter is designed to meet international safety standard IEC 61010-1 CAT IV 600 V

GAOTek True RMS Clamp Meter

SKU: GAOTek-CM-135
GAOTek True RMS Clamp Meter provides accurate AC, AC or DC Current and Voltage readings regardless of waveforms.

GAOTek True RMS DC Clamp Meter

SKU: GAOTek-CM-146
GAOTek True RMS DC Clamp Meter provides accurate AC, AC or DC Current and Voltage readings regardless of waveforms.

GAOTek True RMS Wireless Clamp Meter

SKU: GAOTek-CM-105
GAOTek true RMS wireless clamp meter is designed for technicians who work in high voltage dc environment: solar arrays, wind power, electric railways, and data centers battery banks for uninterruptible power supplies.

GAOTek Turbine Water Digital Flow Meter

SKU: GAOTek-CM-164
GAOTek turbine water digital flow meter is widely used in petroleum, chemical industry, metallurgy, water supply, paper making and other industries.

GAOTek Ultrasonic Clamp Meter

SKU: GAOTek-CM-156
This Ultrasonic Clamp Meter has -13 °F to 248 °F temperature, <1% solid and gas content, 50 V power supply, and -13 °F to 140 °F ambient temperature.

GAOTek Ultrasonic Flow Meter Handheld Clamp on Flowmeter

SKU: GAOTek-CM-117
Technical Specifications Pipe Size DN 0.59 in to 236 in (15mm to 6000mm) Power Consumption Less than 1.5 W Measuring

GAOTek Ultrasonic Water Flow Meter with Clamp on Sensors

SKU: GAOTek-CM-116
GAOTek ultrasonic flow meter has been upgraded based on the previous ultrasonic flowmeter which is still the main product line of the company.

GAOTek Universal Small Pipe Clamp-On Ultrasonic Flowmeter

SKU: GAOTek-CM-163
GAOTek universal small pipe clamp-on ultrasonic flowmeter the first choice for small pipe diameters of DN 15 to DN 40: simple installation and convenient operation.

GAOTek Visual Fault Locator with Power Meter, Cable Tracker, and Sequence Checker

SKU: GT00ZT00ZZ
This product is a test meter which integrates the functions of  a optical power meter, visual fault locator, cable tracker/locator and line sequence checker.

GAOTek Wall Fixed Low-Cost Clamp Meter

SKU: GAOTek-CM-159
AOTek wall fixed low-cost clamp meter is suitable for measuring the flow rate of various sizes.

GAOTek Wall Mounted Clamp Liquid Ultrasonic Flow Meter

SKU: GAOTek-CM-119
GAOTek  handheld ultrasonic flow meter uses an external clamp type sensor to measure liquid flow rate.

GAOTek Waterproof Hydrogen Chloride Gas Detector

SKU: GAOTek-HCGD-104
GAOtek portable Waterproof Hydrogen Chloride Gas detector in various environments.

GAO-GFL-101 Portable DC Ground Fault Detector

SKU: GAO-GFL-101
DC power system grounding is an abnormal occurrence which may lead to system damage.

GAOTek AC and DC Clamp Meter with Integral Test

SKU: GT00Z600ZX
This AC and DC clamp meter is specially designed for measuring AC/DC current and leakage current with modern CT technology and digital integration technology.

GAOTek AC Clamp Meter with Wide Measuring Range

SKU: GT00Z600ZT
This AC clamp meter is specially designed for measuring AC current and AC leakage current and comes with an on-line AC current measuring system with a wide measuring range of current from 0mA~600A.

GAOTek AC/DC Clamp Meter with Non-Contact Measurement

SKU: GT00Z600ZW
This highly accurate AC and DC clamp meter with non-contact measurement is specially designed for measuring AC/DC current, leakage current, and repairing the car circuit leakage up to 600 V line voltage

GAOTek AC/DC Clamp Meter with On-Line Monitoring

SKU: GT00XC00ZZ
This clamp meter with AC and DC Current enables measurement of online AC/DC leakage currents whose voltage is below 600 V.

GAOTek High Accuracy AC Clamp Meter with Wide Measuring Range

SKU: GT00Z600ZU
This high accuracy AC clamp meter is specially designed for measuring AC current, AC leakage current, and on-line current measuring systems with wide measuring range of 0 mA ~ 300 A

GAOTek Light-Weight DC Clamp Meter with High Accuracy

SKU: GT00Z600ZV
This light-weight DC clamp meter measures DC leakage and low current with a resolution of up to 0.01 mA.

Oscilloscope with Scope Meter (Data Storage)

SKU: GT00Z700ZJ
This professionally engineered Oscilloscope with Scope Meter (Data Storage), comes with a large digital display for easy viewing and delivers accurate and precise measurement

GAOTek Ultrasonic Flow Meter with High Accuracy (Wide Pipe Size)

SKU: GT00YX00ZL
This Ultrasonic Flow Meter with High Accuracy (Wide Pipe Size) is designed using advanced circuit design and latest semiconductors using pulse measurement technology with Wide Pipe Size ranging from DN 0.59 in (15 mm) to DN 236.22 in (6000 mm).

GAOTek Portable H/L Voltage Clamp Current Leaker

SKU: GT00YA00ZX
This Portable H/L Voltage Clamp Current Leaker measures high voltage current with a 12.5 in (32 cm) insulating rod, adopting the latest CT technology and integrating mask digital technology.

GAOTek Three-Channel Leakage Current Tester

SKU: GT00YB00ZV
This three-channel leakage current tester provides online measurement, monitoring, and recording of three channel AC leakage currents at the same time by adopting the latest CT and magnetic shielding technology.

GAOTek H/L Voltage Clamp Meter with Data Memory

SKU: GT00YA00ZW
This H/L Voltage Clamp Meter with Data Memory provides high precision and high voltage current measurement by adopting the latest CT and integrated mask digital technology.

GAOTek H/L Voltage Clamp Meter and Detector

SKU: GT00YA00ZY
This H/L Voltage Clamp Meter is designed for measuring high voltage currents and comes with wireless receivers which can receive measured data within a 0.01 mi (30 m) line.

GAOTek H/L Voltage Clamp Current Meter with Data Storage

SKU: GT00YA00ZZ
This H/L Voltage Clamp Current Meter is used as a high-precision, low-voltage clamp meter and as a leakage current meter, measuring the current or leakage current of 0.01 mA, respectively.

GAO Tek’s electrical clamp meters have the following functions:Current Measurement: The primary function of our clamp meter is to measure electrical current. It can measure both AC and DC current by clamping around a conductor and using the built-in current transformer to sense the magnetic field generated by the current.

Voltage Measurement: GAO Tek’s clamp meters also provide voltage measurement capabilities. They can measure AC and DC voltages by using test leads or probes connected to the meter's input jacks. This allows users to measure voltage in circuits and electrical systems.
Resistance Measurement: Some of our electrical clamp meters have the ability to measure resistance, which is useful for checking the continuity of wires and components or for troubleshooting electrical connections.
Data Logging: Our electrical clamp meters come equipped with data logging capabilities. They can store measurements over time, allowing users to analyze trends and diagnose intermittent issues.
True RMS Measurement: True RMS (Root Mean Square) measurement capability is a valuable feature in GAO’s electrical clamp meters. It accurately measures the effective value of complex waveforms, including non-sinusoidal signals, which is crucial for obtaining accurate readings in various electrical systems.
GAO Tek’s electrical clamp meters are rugged, versatile, and precision measurement instruments. They comply with applicable industry standards such as ISO 17025: ISO/IEC 17025, CSA C22.2 No. 61010-1, UL 61010-1, and ICE 61010-1.

Our electrical clamp meters help our customers comply with relevant U.S. government regulations such as:

Occupational Safety and Health Administration (OSHA) Regulations
National Electrical Code (NEC)
Federal Communications Commission (FCC) Regulations
National Institute of Standards and Technology (NIST)
Our electrical clamp meters help our clients in complying with relevant Canadian government regulations such as:

Canadian Electrical Code (CEC)
Measurement Canada
Canadian Standards Association (CSA)
Our electrical clamp meters have the following applications:

Electrical Maintenance and Troubleshooting: GAO’s electrical clamp meters are frequently used by electricians and maintenance technicians for diagnosing and troubleshooting electrical systems.
Energy Audits and Power Consumption Analysis: Our clamp meters are used in energy audits to measure current in electrical circuits, helping to assess power consumption and identify energy-saving opportunities.

Industrial Control Systems: GAO Tek’s clamp meters are used in industrial control systems to monitor electrical currents in motor control centers, switchgear, and distribution panels. They help ensure that machinery and equipment are operating within design parameters, detect imbalances, and diagnose abnormal current draw that may indicate a malfunction or inefficiency.
Automotive and Vehicle Electrical Systems: In automotive and vehicle maintenance, our clamp meters are used to measure current in various electrical systems such as batteries, alternators, and starter motors. They assist in diagnosing charging system issues, identifying parasitic battery drains, and assessing the health of electrical components.

Renewable Energy Systems: Our clamp meters find application in renewable energy systems, including solar photovoltaic (PV) and wind power installations. They are used to measure current in inverters, charge controllers, and battery systems, aiding in system performance evaluation and troubleshooting.

Research and Development: GAO’s clamp meters are utilized in research and development environments to measure current in prototype circuits, conduct experiments, and validate electrical designs.
Our electrical clamp meters can be shipped overnight within the continental U.S. and Canada, and can be shipped globally.