The Sonel MRU-30 uses most known methods of earth resistance measurements. Tests can be performed using the 3-pole, 4-pole, 3-pole with auxiliary clamp and also, additionally, the MRU-30 employs the two clamp method of measurement, without the use of auxiliary test rods which can't be used in some situations. Complementary features of the MRU-30 are measurements of soil resistivity, continuity measurement of protective and equipotential conductors and, using clamps, leakage currents and interference voltages.

  • Robust and weatherproof (IP65) - no ingress of dust, water protected by a nozzle against enclosure from any direction.
  • Ergonomic casing - small and handy casing to make the measurements more convenient than before.
  • Built-in rechargeable battery - saving time to replace flat batteries; can be recharged from Power Bank and Cigarette Lighter Socket!
  • Clear on-screen notes - displayed on screen before and after the measurement to alert user of possible dangers and irregularities.
  • Many measurement methods available in a small, portable casing.

Sonel MRU-30 -Earth Resistance Meter, 50V, IP65 Rated Tester

  • Please allow 4-5 weeks for this product to arrive. 

    This product comes with a 2 year manufacturer warranty.

  • Please see photos and description for full specifications.

    It allows to take the measurements of:

    • earthing resistance using auxiliary electrodes,
    • earthing resistance using auxiliary electrodes and clamp (for measurements of multiple earthing),
    • earthing resistance using double clamps for measuring multiple earthing without underground connections.
    • ground resistivity (Wenner method),
    • continuity of equipotential bondings and protective
    • conductors (meeting the requirements IEC 60364) with auto-zero function – with current 200mA.


    • measurement of resistance of auxiliary electrodes RS and RH,  
    • measurement of interference voltage,
    • measurement in the presence of interference voltage in the power network                        
    • with frequency 50Hz, 60Hz,
    • selection of maximum measuring voltage (25V and 50V),
    • introducing the distance between the electrodes for the resistivity in metres (m) and feet (ft),
    • memory of 990 measurements (10 banks of 99 cells each),
    • calibration of clamp used,
    • data transmission to the computer (USB),
    • indication of battery state.

For Sales, Calibration, or Repair Services Call 1 (888) 868 - 4546

Contact Us 

750 Oakdale Rd Unit 52

Toronto, Ontario

M3N 2Z4 Canada

Local: (905) 406-0100 

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