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M.C. Miller 400D

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400D Soil Resistance Meter Resistance Readings with the Push of a Button

Unique, Error-free Data-logging Option









  • No need to select ranges or adjust dials – the Miller 400D provides a direct read-out of resistance with the push of a button
  • Bluetooth interface allows optional data-logging via a Bluetooth-enabled PC (or PDA)**
  • Rugged, hard plastic case - safe to use on wet ground – IP67 rating for dust and water intrusion
  • Resistance measurement range from 0.01Ω to 10MΩ (auto-ranging)
  • Accuracy: ±1.6% (0.01Ω to 1MΩ range)
  • High resolution digital display
  • Resistance measurements are unaffected by any stray interference signals that may be present in the earth during readings, due to the use of narrow band-pass filters centered at 82.2Hz (the unit’s operating frequency)
  • Runs on a set of replaceable D-cell alkaline need to periodically recharge the unit or to plug it into a power source
  • Performs 10,000 single readings on a fresh set of batteries


  • Storage temperature range (with batteries installed): -40°C to 50°C (-40°F to 122°F)
  • Operating temperature range: -20°C to 54°C (-4°F to 129°F)
  • Dimensions: 12 W x 10.5 L x 5.75 H (30.5cm x 26.7cm x 14.6cm)
  • Weight: 8.6 lbs (3.9kg)