S480A – 4 Terminal Earth Tester


  • High resolution of 1m, ideal for ground systems
  • Strong anti-inference capability
  • Versatile test modes and applications
  • Portable
  • 4 terminal method
  • Accurate results
  • Testing range: 0.000Ω~30000Ω
  • Automatic range selection
  • Resolution: 0.001Ω


S480A is widely used in industries such as power utility, geology, construction, lightning protection, etc. Its high resolution of 1m along with its comprehensive functions makes it a versatile instrument that can be used across numerous industries.


S480A 4 Terminal Earth Tester

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S480A 4 Terminal Earth Tester is a compact handheld earth (ground) test instrument designed to measure earth electrode resistance and soil resistivity. It has several test modes but excels at the 4-terminal method, which eliminates both the contact resistance and the wire resistance. The instrument is also installed with the Fast Fourier Transform (FFT) and Automatic Frequency Control (AFC) technology, making it high in anti-interference capability. These technologies alongside the 4-terminal method, the results obtained are highly accurate.

Soil resistivity measurements are often used for establishing the optimal electrode design and site for a grounding system, or it is also often used in geological or archaeological investigations.    


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