Introducing the insulation tester 1535 for service technicians, electricians, and companies that maintain equipment such as motors, transformers, switchgear, and solar systems. This device offers selectable test voltages from 250 to 2,500 V and resistance measurements up to 500 GO for quick and stable readings. Enhance productivity and equipment safety with a single tool that simplifies troubleshooting and delivers fast, accurate results. With user-selectable test voltage, intelligent measurement functions such as automatic calculation of polarization index (PI) and dielectric absorption ratio (DAR), wide measurement ranges, and high safety according to CAT IV 600 V, along with an integrated voltage alarm, the Fluke 1535 provides reliable and stable insulation testing in a compact device.