• 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!

The Sonel MRU-30 uses most known methods of earth resistance measurements. Tests can be performed using the 3-pole, 4-pole, and 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.

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 measurement of earthing when it is impossible to use auxiliary electrodes),
• Ground resistivity (Wenner method),
• Continuity of equipotential bondings and protective
• Conductors (meeting the requirements IEC 60364) with auto-zero function - with current 200mA.

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 frequencies 50Hz, 60Hz,
• Selection of maximum measuring voltage (25V and 50V),
• Introducing the distance between the electrodes for the resistivity in meters (m) and feet (ft),
• The memory of 990 measurements (10 banks of 99 cells each),
• Calibration of clamp used,
• Data transmission to the computer (USB),
• Indication of battery state.