Toronto, Canada – GAO Comm ( is offering its single clamp earth tester which simplifies ground loop testing and enables non-intrusive leakage current measurement. It can be used in telecommunication systems, electric power systems and in the fields of resistance testing for earth resistance of various equipment and buildings.

This handheld single clamp earth tester, model A0E10001, features easy operation, high accuracy measurement and anti-interference. It measures the integrated value of ground resistance and also tests the leakage current of ground wires. The tester goes beyond the limitations of traditional methods of earth resistance testing as it does not require the disconnection of the ground wire.

This single clamp earth tester offers a wide ground loop resistance range from 0.01 Ω to 1000 Ω with a resolution of 0.001 to 20 Ω at an accuracy of ±1% + 0.01 Ω. It also features automatic self- calibration ensuring correct measurement every time. In addition, the tester is equipped with a 4 bit digital LCD display screen and provides a memory capacity of 50 groups of results.

This single clamp earth tester belongs to GAO’s family of Earth Ground Testers. This line also includes Double Clamp Earth Resistance Tester which has a voltage-inducing transformer and a current-sensing transformer for checking ground resistance of transformers, anti-lightning systems, high voltage power towers and communication equipment; Portable DC Ground Fault Locator which uses advanced computation methods and fuzzy logic to rapidly and accurately display the insulation level of a tested circuit branch providing an insulation index and waveform and Handheld Earth Ground Tester which provides an IP54 protection rating making it suitable for field use. 


For sales inquiries please contact:

1-877 585-9555 ext. 601 – Toll Free (USA & Canada)

1-416 292-0038 ext. 601 – All Other Areas

[email protected]

About GAO Comm

GAO Comm Inc. ( is a well-known supplier of optical and electrical equipment and test instruments which are widely used in Telecommunications, CATV, Power industry and for Science and Research.