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    Clamp-on Earth Resistance Tester, 0.010Ω to 200Ω

    Low-cost digital earth resistance tester for sale online. It is equipped with a 0.010Ω-200Ω measurement range, sound and light alarm, data storage and data retention functions. Clamp on ground resistance tester is widely used in the ground resistance measurement and loop resistance measurement of electric power, telecommunications, meteorology, oil field, construction and industrial electrical equipment.
    SKU: ATO-ERT-200
    30-day Returns
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    Delivery date: 6-12 days

    Get a clamp-on ground resistance tester to accurately test ground resistance with a measurement range of 0.010Ω to 200Ω. Digital earth tester is suitable for grounding system measurements in power systems, telecommunications, meteorology, oil fields and buildings.


    • Digital earth resistance tester is a high-quality ground resistance tester, available with a 32mm clamp and 0.010Ω~200Ω measure range.
    • Ground resistance tester is a non-contact measurement, which is safe and fast. When measuring the loop grounding system, there is no need to disconnect the grounding lead and the auxiliary grounding electrode.
    • The clamp ground resistance tester can measure ground faults that cannot be measured by traditional methods and is suitable for occasions where traditional methods cannot be used.
    • The LCD of the earth testing meter clearly displays the measurement data in high definition, and the data can be displayed in a backlight.


    Model ATO-ERT-2000A+
    Resistance Range 0.010Ω~200Ω
    Current Range -
    Clamp Size 65mm×32mm
    Tester Size 285mm×85mm×56mm 
    Resistance Tester Weight 2.3kg (including accessories)
    Power Supply 6V DC ( 4 PCS of No.5 Alkaline dry batteries)
    Single Measurement Time 0.5 second
    LCD Screen 4 Digits LCD display,  47mm×28.5mm
    Data Memory 99 groups
    Audible And Visible Alarm "du—du—du" for alarming, press AL to turn on/off
    Alarm Threshold Setting Range Resistance: 1-199Ω
    Jaw Opening Size 32mm
    Protection Class Double insulation
    Shift Automatically
    Accessories Resistance Tester: 1PCS; Test Ring: 1PCS; Instrument Case: 1PCS
    Clamp Meter Weight About 1100g (including battery)

    Resistance Measurement Accuracy

    Range Resolution Accuracy
    0.010Ω-0.099Ω 0.001Ω ±(1%rdg+0.01Ω)
    0.10Ω-0.99Ω 0.01Ω ±(1%rdg+0.01Ω)
    1.0Ω-49.9Ω 0.1Ω ±(1%rdg+0.1)
    50.0Ω-99.5Ω 0.5Ω ±(1.5%rdg+0.5)
    100Ω-200Ω ±(2%rdg+1Ω)


    Earth resistance tester details


    ATO provides earth resistance testers with a measurement range of 0.00Ω-300kΩ, which are widely used in ground resistance measurement and loop resistance measurement in fields such as electric power, telecommunications, meteorology, oil fields, construction, and industrial electrical equipment. When measuring the grounding system with a loop, the ground resistance tester does not need auxiliary electrodes and does not need to disconnect the grounding wire, which is safer and faster.

    Applications of 200 ohm ground resistance testerTips: What is a clamp earth resistance tester?

    Clamp earth resistance tester can measure the connection resistance of any looped system without using an auxiliary ground rod or interrupting the grounding of the equipment under test. As long as the ground wire or ground rod is clamped with the clamp head, the ground resistance can be measured safely and quickly. It can also be applied to multiple parallel grounding systems.

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