Sonel MMR-650 – 10A Micro-ohmmeter with Inductive & Resistive modes & Demagnetisation

Request Quote



Designed to measure very low resistances of both resistive and inductive types of objects, including amorphous core transformers. This product is made to be used in power plants, railways and maintenance companies, to measure welded and soldered connections, equipotential bondings, earthing conductors, contacts, bolted connections, windings of motors and power transformers and other resistive and inductive objects. MMR-650 can be also utilized on a production lines (eg. at the final production control stage). An innovative combination of a high-performance measuring device with a modern user interface and advanced data management system. Wireless data transmission, enhanced system of 2D codes and ability to print labels to identify test items, all contribute to bringing new quality of work and allow the user to perform a wide range of measurements.

  • Measurement of resistive and inductive loads (including transformer with amorphous core)
  • Rugged and weatherproof micro-ohmmeter
  • Automatic temperature compensation (with temperature probe)
  • Resistance measurement from 0 to 2,000 ohms
  • Resolution 0.1 micro-ohms
  • Accuracy 0.25%
  • Demagnetization of the transformer core function
  • High noise immunity
  • 4-wire Kelvin probe measurement
  • Measuring voltage up to 10V
  • Limits and signalling set up
  • Li-ion Rechargeable battery
  • LCD Intuitive touch screen
  • IP67
  • 600V CAT III
  • USB, WiFi, LAN
  • Sonel Reader software
  • Includes 2x two-wire 3m test leads, 2x Kelvin clamps, 2x Kelvin pin probes, power cord, USB cable, carry bag, manual, calibration certificate
  • Two-wire 10m and 25m test leads with crocodile clips also available.

Measurement of resistance

Range  Resolution Measurement Current Accuracy
0 – 999.9 μΩ 0.1μΩ 10A 0.25%
1.0000 – 1.9999 mΩ 0.0001 mΩ 10A 0.25%
2.000 – 19.999 mΩ 0.001 mΩ 10A 0.25%
20.00 – 199.9 mΩ 0.01 mΩ 10A / 1A 0.25%
200.0 – 999.9 mΩ 0.1 mΩ 1A /0.1A 0.25%
1.0000 – 1.9999 Ω 0.0001 Ω 1A /0.1A 0.25%
2.000 – 19.999 Ω 0.001 Ω 0.1A 0.25%
20.00 – 199.99 Ω 0.01Ω 10mA 0.25%
200.0 – 1999.9 Ω 0.1Ω 1mA 0.25%