• 250, 500 & 1,000 VDC selectable voltages
  • 0 to 9,999Ω resistance measurement
  • Button lock for Dielectric Absorption Ratio test
  • Sensitive ohmmeter for checking motor winding resistance
  • Internal memory stores up to 9 readings

What's in the Box

  • Digital megohmmeter
  • Test lead set (P/N MTL-45)


The Amprobe AMB-25 insulation resistance tester offers testing of wires, cables, transformers and motors. Insulation resistance testing can be done across 250, 500 and 1,000 VDC test voltages. Additional features of the AMB-25 tester includes button lock for Dielectric Absorption Ratio testing, a sensitive ohmmeter for checking resistance of motor windings and an internal memory capable of storing up to nine readings.