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.

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ID: GT00Y700ZZ

This Megohmmeter with Auto Voltage Release measures insulation resistance and displays automatic release of voltage and comes with 18 groups of data storage capacity.
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This Handheld Milliohm Meter with Auto shutdown adopts high-performance 32-bit ARM processor which works with high accuracy for a wide measurement range from 10 uΏ to 20 MΏ.
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This high-performance Handheld Milliohm Ohmmeter with SCPI Command (Keypad Lock) provides accurate and convenient measurements of passive components for a wide measurement range from 10 μΩ to 20 MΩ
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This portable Ohmmeter with Keypad Lock (Auto Power-Off) function accurately measures electrical resistance between two points in a circuit by adopting a high-performance 32dgt ARM micro-processor
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This Milliohm with Data hold battery tester analyzes the degradation of the battery by testing the internal resistance and voltage ranging from 0.1 mΩ to 200 Ω, 0 - 50 V DC voltage.
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This Micro Ohm Meter with built-in temperature compensation is used to test super low or low resistance and has accuracy of 0.1 % with measurement range 0.1 uΩ to 1.2 GΩ
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This Handheld AC Milliohm Meter with Four Terminal Measurement is designed as low-resistance meter and a voltmeter with a wide resistance measurement range from 0.01mΩ to 2kΩ and is suitable for assembly line tests for all kinds of batteries
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This Micro Ohmmeter with data hold and remote trigger is designed to measure high, medium and low value resistances for a wide measuring range from  0.001 mΩ ~ 20.100 MΩ