AEMC 6255 Micro-Ohmmeter, 0.05% Accuracy

Rugged, low resistance tester measures from 0.0001 mΩ to 2500.0 Ω with 0.05% accuracy on resistive and conductive materials using a four-lead Kelvin method.

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This Micro-Ohmmeter is a rugged, low resistance tester designed for both plant maintenance and field use. Utilizing a four-lead Kelvin method, it is the most accurate Micro-Ohmmeter available, with results within 0.05%. It is uniquely designed to conduct tests on both resistive and inductive material, with operator selection directly from the front panel. Three test modes are available; resistive (instantaneous test), inductive (continuous test), and auto (repetitive test).


  • Measures from 1µohm (0.1µohm resolution) to 2500.0ohm
  • Test current selection of 1mA, 10mA, 100mA, 1A and 10A
  • RTD temperature probe to check tested sample (optional)
  • Selectable metal types
  • Automatic and manual temperature correction
  • Two programmable alarm set points
  • Stores up to 1500 test results
  • Selectable inductive or resistive test modes
  • Automatic multiple test mode (multiple tests without pressing the test button)
  • Large multi-line electroluminescent display
  • Local or remote test setup and control
  • Internal rechargeable batteries conduct up to 5000 - 10A tests
  • Rugged, double insulated waterproof case


  • Checking metallic coating resistance, especially in aeronautics
  • Ground connections and continuity measurement
  • Resistance measurements on motors and transformers
  • Contact resistance measurements on breakers switches
  • Component measurements
  • Electrical cable resistance measurements
  • Mechanical bond tests
  • Wire to terminal connections
  • Aircraft and rail bonds

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