Amprobe AMB-50 Industrial High-Voltage Insulation Tester

(2 customer reviews)

  • Test insulation of wires, cables, transformers, motors, surge arrestors and generators
  • Selectable testing voltages – one testing instrument for low and high voltage systems from 500/1000/2500 and 5000 V
  • Insulation resistance measurement up to 1T Ω
  • User selectable programmable timer (10s to 30 min)
  • Automatic discharge of test object after completion of measurement
  • Diagnostic tools
  • Polarization index (PI)
  • Dielectric absorption ratio (DAR)
  • Comparison feature to set pass/fail thresholds for quick measurement and verification
  • Dual power source – receptacle or batteries
  • Built in internal memory storing 18 measurements
SKU: 3730288 Category:


The Amprobe AMB-50 High-Voltage Insulation Tester has the necessary features for professional insulation diagnostics. It features calculation of PI and DAR parameters. The pass/fail comparison function helps to improve testing productivity. Readings are clearly displayed on a large backlit LCD display. Windows compatible PC Software and USB communications port serve for connecting the instrument to the PC and management of the recorded test data.


Insulation resistance 0.5 MO → 20 GO, 2 MO → 40 GO, 5 MO → 100 MO, 100 MO → 1000 GO
Test voltage and step voltage display range 0 V → 5000 V
Current display range 0 mA → 1.2 mA
Dielectric absorption ratio (DAR) 0 → 9.99
Polarization index (PI) 0 → 9.99
Dielectric discharge test (DD) 0 → 9.99
Leakage current display range 1 mA → 1.2 mA
External voltage measurement 30 V → 600 V
Capacitance measurement
Download PC interface
Memory size 18 Measurements
Display (LCD): 1999 counts. Analog bar graph.
Operating temperature: -10°C~40°C (14°F ~104°F )
Storage temperature: -20°C ~60°C (-4 °F~152°F )
Relative humidity: < 85% @ -10°C ~40°C below; < 90% @ 0°C ~40°C :
Battery type: 8pcs X 1.5V (LR14) batteries or power adaptor (input voltage 230V, 50/60Hz, 75mA, input DC14V, 1.0A). Power adaptor is not included.
Storage environment: -20°C to 60°C, 0 to 70% R.H. with battery removed from meter.

For complete specs please download the product datasheet under the “Resources” tab.


High Voltage Insulation Resistance Tester

Don’t be caught off guard by deteriorating electrical insulation with AMB high voltage resistance testers.

What’s Included

  • AMB-50
  • Test leads & large jaw alligator clips
  • Hard carrying case
  • Software & USB interface cable
  • Power adapter
  • Batteries


AMB-50 Datasheet »

2 reviews for Amprobe AMB-50 Industrial High-Voltage Insulation Tester

  1. dlhpctt

    I find that this meter is very helpfol to use.

    The best thing I likethe amprobe AMB-150 is the size and the
    durabilty that comes with it.It helps to point where I might
    have a problem in the wireing.
    this is one tool that everyone should own.

    ✔ Yes, I recommend this product.

  2. ElSparko

    Be Prepared to hit that E-Stop button

    During my first usage, load began arcing at 5kV settings.

    The ‘Test’ button had no ability to stop the test it had started.,

    I thought none of the buttons worked.
    Pulled power cord, still arcing away.
    (had installed the batteries, argghhhh)

    In desperation, I was about to try to disconnect the 5kV lead, when I was able to read the tiny text that said e.stop

    OK, luckily that button still worked when none of the others did.

    Manual suggests using that button when the computer inside the AMB-50 has crashed. Yikes!

    ✘ No, I do not recommend this product

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