

Fluke 1537 Insulation Resistance Tester and Megohmmeters
The Fluke 1537 Insulation Resistance Tester is a powerful, portable, and high-performance tool designed for fast, accurate, and reliable insulation testing. With user-selectable test voltages ranging from 250 V to 2500 V and insulation resistance measurement capabilities up to 500 GΩ, it’s built for industrial, electrical, and solar applications. Featuring automatic Polarization Index (PI) and Dielectric Absorption Ratio (DAR) calculations, data storage, enhanced safety with a CAT IV 600V rating, and over 1,300 tests per charge, the 1537 delivers unmatched efficiency and reliability for professionals.
Description
The Fluke 1537 Insulation Resistance Tester is engineered to provide fast, accurate, and dependable insulation testing in a compact and lightweight design, making it ideal for both field and factory use. Offering user-selectable test voltages from 250 V to 2500 V, it enables flexibility to meet a wide range of testing requirements across industrial, commercial, and solar applications. With the capability to measure insulation resistance up to 500 GΩ, this tester ensures deep diagnostic capabilities for critical systems.
Built with a short circuit current up to 5mA, the Fluke 1537 delivers stable and rapid resistance measurements, improving testing efficiency. It also features automatic PI and DAR calculations, helping users quickly assess insulation quality without manual calculations. The device supports a ramp test mode, enabling linear voltage increases to identify hidden insulation weaknesses effectively.
The Fluke 1537 stands out with its data storage capability, allowing you to save measurements directly on the device and transfer them later to a PC via the included software for reporting and analysis. Its visual and audible continuity indicators enhance usability, while the CAT IV 600V safety rating ensures maximum protection when working in high-voltage environments. Additionally, the tester enables more than 1,300 insulation tests per charge at full voltage, making it one of the most efficient tools in its class.
This rugged, durable, and high-performance insulation resistance tester is designed to handle demanding conditions and provides technicians with an all-in-one solution for diagnostics, preventive maintenance, and troubleshooting.
Features
- Wide Test Voltage Range – Selectable test voltages from 250 V to 2500 V for versatile applications.
- High Measurement Capacity – Measures insulation resistance up to 500 GΩ for thorough diagnostics.
- Automatic PI & DAR Calculations – Saves time by providing instant results without manual computation.
- High-Performance Battery – Conduct 1,300+ tests on a single charge for maximum productivity.
- Fast & Stable Measurements – Short circuit current up to 5mA ensures reliable insulation readings.
- Data Storage & PC Connectivity – Save test results and manage them efficiently using included software.
- Enhanced Safety – CAT IV 600V rated with built-in voltage detection and warning system.
- Ramp Test Mode – Gradually increases voltage to detect hidden insulation faults effectively.
- Visual & Audible Continuity Indicators – Simplifies real-time verification of continuity status.
- Compact & Rugged Design – Lightweight yet durable, ideal for field and industrial environments.
Includes
- Fluke 1537 Insulation Reistance Tester
- Test leads with alligator clips (red, black, green)
- Probe (red, black)
- Soft carrying case
- USB cable (Fluke 1537 only)
- PC software (Fluke 1537 only – downloadable from the Fluke Website)


