The Fluke 1535 and Fluke 1537 Insulation Resistance Testers are specialized diagnostic tools used to measure the electrical insulation resistance of cables, motors, transformers, and other high-voltage equipment. These testers are designed to simplify troubleshooting in various environments, including industrial, field, and solar installation settings.https://sapphire-tech.com/product/insulation-resistance-tester-1535-1537/