• Gossen Metrawatt
  • Gossen
  • Camille Bauer


Thank you

Item number: M312N

Clamp Meter for Measuring of Ground Loop Resistance, Loop Inductance, Touch Voltage, and Leakage Current

The earth clamp meter can be used to test the resistance of any conductive system which demonstrates loop characteristics.

  • m312n-metraclipearth_set_15063.jpg
  • m312n-metraclipearth_persp1_15060.jpg
  • m312n-metraclipearth_persp2_15062.jpg

Product Highlights

  • Compact and user-friendly - One-hand operation thanks to minimal weight and easy to open clamp with spring force compensation
  • Large OLED display: up to 3 measured values can be read simultaneously
  • Clamp opening Ø 35 mm max.
  • Minimal influence due to interference current
  • Measured value memory for resistance and leakage current, each with date and time
  • Extremely safe thanks to CAT IV 600 V


Following measurements are possible:

  • Earth resistance measurement if grounding is connected in series to the equipotential bonding conductor.
  • Other earth measurements, for example via overhead ground wires or interconnected transmission towers for power transmission or telecommunications.
  • Measurements at distributed ground connections with a common ground plane.

  • Technical characteristics

    Measuring functions

    • Ground loop resistance: 0,01 ... 1500 O
    • Loop inductance: 10 ... 500 µH
    • Leakage current: 0,2 mA ... 40 A AC
    • Touch voltage: 0,1 ... 75 V

Download Center

In our Download Center you will find all documentations from the product area in English.

More Topics


If you have questions about the product, need technical information or the current delivery time? Our sales department will be happy to help you!

Sales Support

Telephone: 732-287-3680

Send message


Under myGMC you can register your product, and receive up-to-date information on firmware updates, standard changes and much more.