Electrical Testers
GAO’s electrical testers are devices used to measure, test, and troubleshoot electrical parameters and conditions in electrical systems and circuits. They are used by electricians, technicians, and professionals working with electrical equipment. Our electrical testers come in various forms, each designed for specific testing purposes.  

GAO’s electrical testers are composed of display probe or test leads, measurement range selector, power source, control buttons, sensors, circuit protection, housing, calibration adjustments, data logging or connectivity. 

The other common names of the other electrical testers are voltage testers, continuity testers, multimeters, ammeters, ohmmeters, insulation testers, phase sequence testers, clamp meters, ground testers, power quality analyzers, frequency counters, earth resistance testers, impedance analyzers, network analyzers, surge testers, high-potential testers, leakage current testers, power factor meters, capacitance meters, inductance meters, function generators, logic analyzers, oscilloscope, EMI/RFI testers, battery testers, field intensity meter, cable testers, spectrum analyzers, dielectric strength tester, and infrared thermometers. 

GAO Tek has been focused on servicing the North American markets and has earned praise from many of its customers in the U.S., Canada, and Mexico.

Showing 1–24 of 298 results

GAOTek Electric Tester Car Diagnostic

SKU: GAOTek-OET-269
Overview GAOTek electric tester car diagnostic is an advanced tablet scan tool based on the Android operating system. Consist of
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GAOTek Insulation Resistance Tester

SKU: GAOTek-OET-268
GAOTek Insulation Resistance Tester Insulation Resistance Tester has operating temperature of 14 °F to 122 °F, power consumption of ≤150 mA and testing voltage of up to 5000 V.
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GAOTek Electric Clamp Meter

SKU: GAOTek-OET-267
This Electric Clamp Meter has current range of 0.00 mA to 20.0 A, resistance range of 0.010 ohm to 1200 ohm and single measurement time of 0.5 second.
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GAOTek Low Voltage Current Transformer Ratio Tester

SKU: GAOTek-OET-266
GAOTek low voltage current transformer ratio tester can easily and quickly realize on-line detection of current transformers in metering devices and current and leakage in 380 V- or 220-volt power systems.
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GAOTek Four Wire Earth Ground Resistance Tester

SKU: GAOTek-OET-264
GAOTek Four Wire Earth Ground Resistance Tester has Test Hold function for easy operation. Auto ranging, Automatic Zero adjustment,
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GAOTek Digital High Voltage Insulation Tester

SKU: GAOTek-OET-253
GAOTek digital high voltage insulation tester voltage insulation tester is also equipped with 4 voltage ranges from 250 V to 2500 V.
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GAOTek Electrical 3 Phase Transformer Turn Ratio Test

SKU: GAOTek-OET-252
This Electrical 3 Phase Transformer Turn Ratio Test has voltage measurement accuracy on HV side of 0.05% and accuracy on LV side of 0.1%.
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GAOTek Electric Tester

SKU: GAOTek-OET-251
GAOTek electric tester transformer calibrator could be used to measure angle difference, admittance, impedance of CT and PT
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GAOTek Magnetic Metal Resistivity Tester

SKU: GAOTek-OET-250
GAOTek magnetic metal resistivity tester uses the electromagnetism testing principle. Testing objects focus on non-ferromagnetic material.
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GAOTek Electric Gasoline Fuel Pump Tester

SKU: GAOTek-OET-194
GAOTek electric gasoline fuel pump tester apparatus is fit for the industry of insulation material, engineering plastics and solid combustible material.
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GAOTek Insulation Resistance Tester

SKU: GAOTek-OET-226
GAOTek insulation resistance tester is an indispensable instrument for insulation resistance test, AC voltage test, DC voltage test timing, voltage detection, electromechanical installation, maintenance, power operation, etc.
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GAOTek Universal Electric Wire Harness Tester

SKU: GAOTek-OET-149
This Universal Electric Wire Harness Tester has operating temperature of 32 °F to 104 °F, power consumption of ≤30 VA and working humidity of ≤90% RH.
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GAOTek Negative Ion Tester

SKU: GAOTek-OET-148
GAOTek negative ion tester is based on the most advanced GM ray energy detection technology and used to measure weak energy of radioactive rays from natural ores, ceramics, tourmaline, etc.
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GAOTek Multifunctional Industrial Leeb Harness Tester

SKU: GAOTek-OET-147
This Multifunctional Industrial Leeb Harness Tester has testing direction of 680 °F, working voltage of 7.4 V and recharge time of 2.5 to 3.5 hours.
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GAOTek Electric Circuit Breaker Loop Resistance Tester

SKU: GAOTek-OET-209
This Electric Circuit Breaker Loop Resistance Tester has operating temperature of 32 °F to 104 °F, resolution of 0.1 Min and power of 1000 w.
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GAOTek Hand Operated Insulation Tester

SKU: GAOTek-OET-208
This Hand Operated Insulation Tester has operating temperature of 32 °F to 104 °F, short circuit current of 5 mA and output voltage of 30 kV.
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GAOTek Eddy Current Copper Conductivity Meter

SKU: GAOTek-OET-207
This Eddy Current Copper Conductivity Meter has operating temperature of 41 °F to 104 °F, humidity of 0 to 95% and operating frequency of 60 KHz.
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GAOTek Electrical Relay Testing Equipment

SKU: GAOTek-OET-146
GAOTek electrical relay testing equipment comes with a large LCD display and flexible rotating mouse controller.
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GAOTek High Voltage Generator Withstand Tester

SKU: GAOTek-OET-110
GAOTek high voltage generator withstand tester combines the advanced technology of modern digital conversion, fully computer control, automated boost, buck, measurement and protection human intervention can cared out during the automatic step-up process, mains advantage includes full electronic, small sizes and light weight, large-screen LCD (clear and intuitive), printer output test report, easy to use designed to fully make the power industry standards.
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GAOTek Insulation Resistance Safety Tester

SKU: GAOTek-OET-150
GAOTek insulation resistance safety tester is an economical and intelligent safety tester with the characteristics of small size, light weight, pleasing appearance and easy operation.
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GAOTek Battery Analyzer

SKU: GAOTek-OET-340
This battery analyzer has a power supply of 12 V, battery capacity of 30 AH to 300 AH, voltage accuracy of 5 mV and conductance of 300 S to 2200 S.
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GAOTek Wireless High Voltage Phase Sequence Tester

SKU: GAOTek-OET-339
This wireless high voltage phase sequence tester has AC 10 V to 500 kV phase detecting voltage, 45.0 Hz to 65.0 Hz frequency and 0° to 360° phase.
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GAOTek Winding Insulation Resistance Tester

SKU: GAOTek-OET-338
GAOTek Winding Insulation Resistance Tester with precision design is suitable for testing the insulation resistance of most primary and secondary equipment such as cable and transformers.
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GAOTek Transmission Line Phase Sequence Detector

SKU: GAOTek-OET-337
his Transmission Line Phase Sequence Detector has a power supply of AC 220 V 50 Hz, frequency accuracy of ±0.1 Hz, and a humidity of ≤85 %.
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GAO Tek’s electrical testers have the following functions:

  • Multimeter: Our multimeters are versatile electrical tester that combines several functions into a single device. It measures voltage, current, and resistance. Our multimeters can also test continuity, diode functionality, and capacitance. They are used in electrical and electronic troubleshooting, circuit testing, and general electrical measurements.
  • Voltage Tester: Our voltage tester are used to determine the presence or absence of voltage in a circuit. It helps to identify live wires and ensures electrical safety. GAO’s voltage testers are available in various forms, including non-contact voltage testers (which detect voltage without physical contact) and test lamps or pens (which light up or beep when voltage is detected).
  • Circuit Analyzer: Our circuit analyzers are used to test the integrity and safety of electrical circuits. It measures voltage levels, checks for proper grounding, verifies the presence of a neutral wire, and identifies wiring faults such as reversed hot and neutral wires. GAO circuit analyzers are used in residential and commercial electrical installations.
  • Ground Fault Circuit Interrupter (GFCI) Tester: GFCI testers are designed to test the functionality of ground fault circuit interrupters, which are electrical safety devices commonly found in areas where water is present (e.g., bathrooms, kitchens, and outdoor outlets). Our GFCI testers simulate ground faults and help ensure that GFCIs trip properly when a fault occurs.
  • Phase Sequence Tester: Our phase sequence testers are used in three-phase electrical systems to determine the correct order of the phase sequence. They ensure that the three phases are correctly connected and help prevent damage to motors and other three-phase equipment.
  • Insulation Resistance Tester (Megohmmeter): GAO’s Insulation resistance testers are used to measure the electrical resistance of insulating materials such as wires, cables, and electrical equipment. They help identify insulation problems and assess the overall insulation integrity. Our megohmmeters are used in maintenance and troubleshooting of electrical systems.
  • Power Quality Analyzer: Our power quality analyzers monitor and analyze various parameters of an electrical system, including voltage, current, frequency, harmonics, and power factor. They help identify power quality issues such as voltage fluctuations, harmonic distortion, and reactive power problems. GAO power quality analyzers are essential in industrial settings and for diagnosing electrical problems.

GAO Tek’s electrical testers are rugged, versatile and precision measurement instruments. They comply with applicable industry standards such as IEC 61010, IEC 61557, IEC 61000, UL 61010, ANSI/ISA-82.02.01, NIST Handbook 44, and ISO/IEC 17025

Our other electrical testers help our customers comply with relevant U.S. government regulations such as

  • National Electrical Code (NEC)
  • Occupational Safety and Health Administration (OSHA) Standards
  • National Institute of Standards and Technology (NIST) Regulations
  • Consumer Product Safety Commission (CPSC) Regulations

Our other electrical testers help our clients in complying with relevant Canadian government regulations such as:
Canadian Electrical Code (CEC)
Occupational Health and Safety (OHS) Regulations
Innovation, Science and Economic Development Canada (ISED) Regulations
Measurement Canada Regulations
Health Canada Regulations

Our other electrical testers have the following applications:

  • Circuit Analyzer: Gao Tek circuit analyzers are used to diagnose and analyze electrical circuits, including identifying faults, testing circuit integrity, and measuring voltage and current levels. It helps in troubleshooting electrical systems and ensuring proper circuit operation.
  • Insulation Tester/Megohmmeter: Our insulation testers are used to measure the insulation resistance of electrical components or systems. They help in assessing the insulation integrity of wires, cables, motors, transformers, and other electrical equipment. Gao insulation testers are used in preventive maintenance programs and during installation or troubleshooting to detect insulation breakdowns or faults.
  • Power Quality Analyzer: GAO’s power quality analyzers are used to measure and analyze various parameters related to the quality of electrical power. This includes voltage fluctuations, harmonics, power factor, voltage/current waveform distortions, and other power-related anomalies. Our power quality analyzers help in diagnosing power quality issues, assessing system performance, and identifying potential electrical problems.
  • Continuity Tester: GAO Tek continuity testers are used to check the continuity of electrical connections, wires, and components. They help in determining if a circuit is complete (closed) or broken (open). GAO continuity testers are used during installation, troubleshooting, or repair to ensure proper circuit connectivity and identify any interruptions or faults.
  • Phase Rotation Tester: Our phase rotation testers are used to determine the rotation direction of three-phase electrical systems. They help ensure that all phases are correctly connected and aligned, preventing potential equipment damage or operational issues due to incorrect phase rotation.
  • Ground Resistance Tester: Our ground resistance testers are used to measure the resistance of the grounding system. They help in evaluating the effectiveness of grounding and bonding in electrical installations, ensuring compliance with safety standards and minimizing the risk of electrical hazards.
  • Capacitance Meter: GAO Tek capacitance meters are used to measure the capacitance of capacitors. They help in testing and selecting capacitors for applications, verifying capacitance values, and assessing the condition or health of capacitors in electrical circuits or devices.

Our other electrical testers can be shipped overnight within the continental U.S. and Canada, and can be shipped globally.