Sonel – MRU-21 – 3 Pole Earth Resistance Meter

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Datasheet - MRU-21_en_v1.1


  • 3-Pole Earth Resistance Tester Kit
  • Earth resistance measurements using auxilary probes with 3-pole method, with the resistance of auxillary rods up to 50k, as well as resistance measurements using 2-pole method
  • Measurement of continuity of equipotential bondings and protective conductors with auto-zero function
  • Measurement of and high immunity to presence of interfering voltages from power system
  • Measurement of resistance of auxiliary electrodes RS and RH
  • Memory of 990 measurements, can transfer data via USB
  • Battery or rechargeable battery power supply, with indication of battery state and auto-off after 5 minutes
  • Selection of maximal measurement voltage (25V or 50V)
  • 300V CAT IV
  • Includes: 1.2m blue test lead, 2.2m black test lead, 30m red test lead on reel, 15m blue test lead on reel, 2x crocodile clips black & blue, USB cable, 2x 30cm earth probes, carry case, hanging straps, batteries, Sonel Reader software, Calibration certificate