Electrical Ohmmeters

GAO’s electrical ohmmeters are devices used to measure electrical resistance. Resistance is the opposition that a material offers to the flow of electric current, and is measured in units called ohms. GAO Tek’s ohmmeters work by passing a small current through the circuit or component being tested and measuring the voltage drop across it. By knowing the current being passed and the voltage drop, our electrical ohmmeter can calculate the resistance of the component using Ohm’s law (R=V/I).

GAO’s electrical ohmmeters are composed of power source, measuring instrument (usually a galvanometer), and resistor.

The alternative names of ohmmeters include resistance meters, impedance testers, resistance measuring devices, ohm gauges, electrical resistance meters, impedance meters, ohmic instruments, resistor testers, conductor resistance meters, electrical impedance meters, ohmic testers, conductance meters, resistance measurement tools, electric resistance gauges, impedance analyzers, ohm detectors, conductivity meters, resistance testing equipment, impedance checking devices, and ohm readers. 

Showing 1–24 of 72 results

GAOTek Contact Resistance Tester

GAOTek contact resistance tester is crucial in applications where a high current passes through a pair of mechanically independent metallic contacts, as it is imperative that the resistance remains as low as possible.

GAOTek Contact Resistance Tester

GAOTek contact resistance tester adopts the new technology of the power supply, which can continuously output large current for a long time.

GAOTek DC Digital Resistance Meter

SKU: GAOTek- OHM-189
GAOTek DC digital resistance meter is suitable for measuring various high, medium, and low-value resistors, as well as different types of resistances such as switch contact resistance, connector contact resistance, relay wire coil and contact resistance, transformer, inductor, motor, deflection coil winding resistance, solder joint contact resistance, wire wrapping resistance, metal riveting resistance of cars, ships, and airplanes, printed pattern lines and hole resistance, and metal defect detection.

GAOTek DC Resistance Tester

This DC Resistance Tester has work temperature of 14 °F to 122 °F, work power of AC 220 V ± 10%, and environment humidity of over 85% RH.

GAOTek Digital Ground Resistance Meter

This Digital Ground Resistance Meter has -4 °F to 131 °F of operating temperature, accuracy class of ± (1% + 0.01 Ω), and data memory of 99 sets.

GAOTek Digital LCR Meter Handheld Frequency Inductance Resistance Capacitance Tester Multimeter Ohmmeter

GAOTek Digital LCR Meter Handheld Frequency Inductance Resistance Capacitance Tester Multimeter Ohmmeter features powerful functions, high accuracy, fast speed, and long standby time.

GAOTek Digital Loop Resistance Meter

 GAOTek digital loop resistance meter adopts the new technology of the power supply, which can continuously output large current for a long time.

GAOTek Digital Megohmmeter

This Digital Megohmmeter has 0.01 MΩ insulation resistance resolution, 0 V to 1000 V DC voltage range, and 12.6 V rechargeable battery power supply.

GAOTek Digital Megohmmeters

This Digital Megohmmeters has 0 V to 1000 V DC voltage range, 0 V to 750 V AC voltage range, and ≥ 6 mA at 15 KV output short-circuit current.

GAOTek Digital Micro OHM meter

SKU: GAOTek- OHM-195
This Digital Micro Ohm Meter has temperature of 32 °F to 158 °F, accuracy class of 0.1 %, and testing voltage of 198 V DC to 240 V DC.

GAOTek Digital Micro Ohmmeter

SKU: GAOTek- OHM-191
GAOTek digital micro ohmmeter. This instrument is indeed versatile, capable of measuring a wide range of resistances in various applications.

GAOTek Digital Ohmmeter

GAOTek digital ohmmeters multi-purpose comprehensive measuring device for measuring DC resistance using the four-terminal measurement principle.

GAOTek Digital Resistance Meter

SKU: GAOTek- OHM-181
digital resistance meter is designed for a wide range of applications involving resistance measurements.

GAOTek Dynamic Contact Resistance Meter

This Dynamic Contact Resistance Meter has 14 °F to 122 °F of temperature, accuracy of ± (0.5 % rdg +2 words), and output current of 200 A 100 A.

GAOTek Dynamic Contact Resistance Tester

GAOTek dynamic contact resistance tester is suitable for precision measurement for high or low voltage switches contact resistance and cable or line DC resistance.

GAOTek Earth Resistance Meter

GAOTek earth resistance meter is adopted the latest digital and micro-processing technology and can accurately detect ground resistance, soil resistivity, and ground voltage.

GAOTek Four Wire Ohmmeter

GAOTek four wire ohmmeters are used to measure DC low resistance through a 4-wire method.

GAOTek Handheld Electromagnetic Radiation Detector

SKU: GAOTek-RMD -109
GAOTek Handheld Digital electromagnetic radiation detector is a field-portable unit that measures DC magnetic fields with direct digital readout in mT or G.

GAOTek Handheld Low Resistance Ohmmeter

GAOTek handheld low resistance ohmmeter provides fast, accurate, and repeatable measurements in electrically noisy environments.

GAOTek High Precision OHM Meter

This High Precision Ohm Meter has temperature of 14 °F to 211.82 °F, test current of 1 A to 1 μ A, and measurement range of 0.01 μ Ω to 1200 MΩ.

GAOTek High Precision Ohmmeter

GAOTek high precision ohmmeters are MCU controlled measuring instruments for direct readout of resistance and current.

GAOTek High Voltage Megohmmeters

SKU: GAOTek- OHM-190
This High Voltage megohmmeters has temperature of −4°F to 104°F, short circuit current of 10 mA, and measurement range of 2 MΩ to 2000 MΩ.

GAOTek Insulation Resistance

SKU: GAOTek- OHM-177
This Insulation Resistance Meter has temperature measurement of −49 °F to 257°F, testing voltage of 2.5 KV, and current test range of 10 mA.

GAOTek Insulation Resistance Earth Meter

SKU: GAOTek- OHM-182
This Insulation Resistance Earth Meter has an operating temperature of 14°F to 122°F, resolution of 0.001, and DC voltage of 0.0 V to 1000 V.

GAO Tek’s electrical ohmmeters have the following functions:

  • Testing Resistance - GAO's ohmmeters are used to test the resistance of resistors, capacitors, and coils. By measuring the resistance of these components, technicians can determine if they are functioning properly or if they need to be replaced.
  • Continuity Testing - Our ohmmeters can also be used to test for continuity in a circuit. Continuity is the ability of an electrical circuit to allow current to flow from one end to the other without interruption. By measuring the resistance of a circuit with an ohmmeter, technicians can determine if the circuit is continuous or if there is a break in the circuit.
  • Troubleshooting - GAO Tek’s ohmmeters can be used to troubleshoot electrical circuits and components. By measuring the resistance of various parts of a circuit, technicians can isolate and identify faulty components that may be causing problems.
  • Quality Control - Our ohmmeters are also used in quality control processes to ensure that electrical components meet certain specifications and standards.

GAO Tek’s electrical ohmmeters are rugged, versatile and precision measurement instruments. They comply with applicable industry standards such as ANSI/IEEE C57.13.1, NFPA 70E, ASTM D257 and MIL-PRF-55342.

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

  • Occupational Safety and Health Administration (OSHA) regulations
  • National Institute of Standards and Technology (NIST) regulations
  • Federal Communications Commission (FCC) regulations
  • Consumer Product Safety Commission (CPSC) regulations

Our electrical ohmmeters help our clients in complying with relevant Canadian government regulations such as:

  • Canadian Electrical Code (CEC)
  • Measurement Canada
  • Industry Canada
  • Canadian Environmental Protection Act (CEPA)

Our electrical ohmmeters have the following applications:

  • Testing electrical circuits - GAO Tek’s ohmmeters are used to test the continuity of electrical circuits and to identify faults or breaks in wiring.
  • Checking the resistance of components - GAO’s ohmmeters can be used to measure the resistance of individual components such as resistors, capacitors, and inductors.
  • Testing the insulation of cables and wires - Our ohmmeters can be used to test the insulation resistance of cables and wires to identify potential faults or breaks in the insulation.
  • Quality control testing - GAO Tek’s ohmmeters are used in quality control testing to ensure that electronic components and devices meet certain resistance specifications.
  • Laboratory research - Our ohmmeters are used in laboratory research to measure electrical resistance in a variety of materials and to investigate the properties of conductive and non-conductive materials.
  • Industrial manufacturing - GAO's ohmmeters are used in industrial manufacturing to ensure that electrical components and systems meet certain resistance specifications and quality standards.

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