Insulation Testers

Amprobe AMB-45 Insulation Resistance Tester

Amprobe

5.8 - Good

Digital megohmmeter with 250/500/1000V test voltages, 4000 MOhm range, PC data logging, and programmable timer for HVAC motor insulation diagnostics.

Fluke 1503 Insulation Resistance Tester

Fluke

6.3 - Good

Compact insulation tester with 500/1000V test voltages, 2000 MOhm range, live circuit detection, and CAT IV 600V safety for HVAC electrical maintenance.

Fluke 1587 FC Insulation Multimeter

Fluke

7.2 - Excellent

Full multimeter combined with up to 1000V insulation tester and Fluke Connect wireless. Essential for diagnosing compressor windings and motor insulation.

5-range high-speed insulation tester (50-1000V) with 0.3-second response, Bluetooth wireless data transfer, and 1-meter drop-proof construction.

Klein Tools ET600 Insulation Resistance Tester

Klein Tools

6.1 - Good

Multi-function megohmmeter with 125/250/500/1000V test voltages, 4000 MOhm range, True RMS multimeter functions, and built-in stand for hands-free testing.

Megger MIT400/2 CAT IV Insulation Tester

Megger

6.5 - Good

CAT IV 600V insulation tester with 250/500/1000V test voltages, 200 GΩ range, variable voltage in 10V steps, and IP54 weatherproof rating for HVAC fieldwork.

Supco M500 Megohmmeter

Supco Inc.

5.8 - Good

Affordable 500V megohmmeter measuring up to 1000 MOhm, designed specifically for testing HVAC compressor winding insulation and motor diagnostics.