Sonel MRU-30 Multi-function Earth Tester

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Datasheet - MRU-30


  • Multifunction Earth Test Set
  • 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.
  • Measurement of earth resistance (3-pole and 4-pole method)
  • Measurement of multiple earthing resistance (3-lead + clamp)
  • Measurement of multiple earthing resistance with use of 2 clamps
  • Soil resistivity measurement (Wenner method)
  • Continuity of equipotential bondings and protecting conductors
  • Additionally:
    • 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.
  • Sonel Reader software