Earth Testers

The DET-20A Digital Earth Tester is a tough, high-precision tool crafted to measure Earth Resistance, Soil Resistivity, and Earth Voltage with both reliability and accuracy. It boasts a 4½-digit LCD display with a backlight, and it uses RSR (Ratio Metric Synchronous Rectification) technology to ensure stable readings, even when the battery voltage dips.

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Measuring both earth resistance and soil resistivity is important because they serve different purposes. Earth resistance measures the total resistance of an installed grounding system, indicating its effectiveness in safely conducting fault currents and ensuring system safety. In contrast, soil resistivity is an intrinsic property of the soil, measured before designing the grounding system. It determines the soil’s conductivity and helps decide the number and type of grounding electrodes needed to achieve the desired earth resistance.