Extech Ground Resistance Tester Clamp On - 382357

SKU: 382357
Product Weight 3.00 Pounds
This clamp meter gives a non-contact measurement of ground resistance without the need for ground spikes. With a highly accurate resolution of 0.002 ohms and a large resistance range of 0.025 to 1500 ohms.
Sales price $1,359.00

Extech Ground Resistance Tester Clamp On - 382357

Enables non-contact measurements of ground conductors without the need for installing auxiliary ground spikes382357-s


  • Autoranging ground resistance and True RMS AC leakage current measurements
  • With a ground resistance testing range from 0.025 to 1500 ohms for all ground resistances
  • Programmable datalogging with 116 readings
  • Programmable Hi/Lo alarm
  • 0.9” (23mm) jaw size for large ground rods
  • Simplifies ground resistance measurements on multiple point ground systems
  • Auto power off
  • Verification resistors confirm accuracy
  • Automatic self calibration when powered on
  • 9999 count LCD display for quick, easy and certain reference
  • Data hold feature makes review of data more convenient
  • Electrical noise detection feature prevents inaccurate readings
  • CAT III-300V, CAT II-600V safety rating
  • 1 year warranty
  • Comes complete with a 9V battery, Resistance check plate and durable metal storage case

Ground resistance is the capacity of the ground to accept an electrical charge flowing through it. This is vital to the safety of electrical systems around the world. Whether electricity is flowing through a neutral conductor back to the power producer or being directed literally into the earth, grounding capabilities must be large enough to accept the entire charge safely.

382357-2Measuring ground resistance has never been easier than with the Clamp-On Ground Resistance Tester. Simply clamp the large jaws around the grounding rod and the automatic self calibrating ground resistance tester does the rest. Great for verification of resistance in ground grids in any grounding circumstance.

Inaccurate readings are prevented through a unique electrical noise detector. Frustrating and complicated ground resistance calculations are made easy with this easy to use and highly accurate (0.002 ohm resolution) Ground Resistance Tester. The 382357 Ground Resistance Tester User Manual is attached to this page to answer any further questions.


  • Ground Resistance Range: 0.025 to 1500Ω
  • Ground Resistance Resolution: 0.002Ω
  • Ground Resistance Basic Accuracy: ± 1.5%
  • AC Leakage Current (Trms): 1mA
  • AC Current (Trms): 0.3mA to 30.00A
  • Resistance Test Frequency: 3.333kHz
  • Operating Temperature: 4 to 122 degrees F (-20 to 50 degrees C)
  • Dimensions: 10.2 x 4.4 x 1.9" (258 x 110 x 47mm)
  • Weight: 24.7oz (700g)

Unit Ship Weight: 3 lbs



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