The Fluke 1535 and 1537 2,500 V Insulation Resistance Testers are engineered to simplify frontline troubleshooting whether you’re on the factory floor or working in the field at a solar installation. With user selectable test voltages from 250 V to 2,500 V and resistance measurements up to 500 GΩ these testers allow you to cover more workload with a single tool. Equipped with an intuitive user interface, a short circuit current of up to 5 mA and a CAT IV 600 V rating these portable high-voltage insulation testers can deliver rapid and stable resistance measurements no matter where you take them. The 1537 Insulation Resistance Tester also allows you to store measurements for later review or PC transfer, using the provided software.
• Selectable Voltage Tests: Tailor your tests with user-selectable voltages of 250 V, 500 V, 1000 V, and 2500 V to cover both industrial and solar applications.
• Extended Insulation Resistance Measurement: Reach up to 500 GΩ in insulation resistance measurement for a thorough analysis.
• Intelligent Calculations: Automatically calculate Polarization Index (PI) and Dielectric Absorption Ratio (DAR), minimizing the influence of environmental factors.
• High Measurement Capacity: Execute up to 1,300 measurements at 2,500 V or 6,500 measurements at 250 V on a single charge, enhancing productivity.
• Enhanced Safety Features: Benefit from a CAT IV 600V rating and a built-in voltage alarm function for heightened safety during operations.
The Fluke 1537 has these additional features:
• Extended Measurements: The Fluke 1537 enhances your testing capabilities with AC/DC voltage and resistance measurements.
• Stable Resistance Measurements: Achieve faster, more stable insulation resistance measurements with a short circuit current up to 5mA.
• Fine-tunable Test Voltage: Adjust the test voltage from 250 V to 2500 V in 100 V increments to meet specific testing requirements.
• Dielectric Discharge Rate Calculation: Automatically calculate the dielectric discharge rate (DD) to aid in identifying elusive insulation issues.
• Ramp Test Mode: Linearly increase the applied test voltage 100 V/s to help identify potentially hard to identify fault conditions.
• Visual and Audio Continuity Indicator: Verify continuity visually on the screen display or with the audible indicator so you can focus on your testing procedure without looking at the display.
• Customizable Testing Parameters: Set user-defined labels, adjust test duration, and store measurement results for a tailored testing experience.
• Effortless Data Management: Download and manage data effortlessly with the provided PC software.
• Extended Warranty: Enjoy peace of mind with an extended 3-year warranty.

Key Features
• User-selectable voltages of 250 V-2500 V
• Up to 500 GΩ insulation resistance measurement
• Short circuit current up to 5mA for fast, stable measurements
• Automatically calculate PI and DAR
• Perform 1,300+ insulation tests on a single charge

With heavy duty one-piece moulded insulation sheaths covering both blade and transparent plastic handle for extra protection and safety. Will detect 'live' electricity supply. Suitable for AC to 125 - 250V. 3mm wide tip. Conforms to DIN VDE 0680 part 6:1977-04.

A versatile and rugged tool for high current applications



Confidently take reliable readings with true-rms, Fluke 355 and 353 digital clamp meters; the tool of choice for high current clamp-on amp meter sizes up to 2000 A. The extra wide jaws easily clamp around large conductors, which are typically found in high current applications. The extra robust design and CAT IV 600 V, CAT III 1000 V ratings add an extra element of user protection when performing high power measures.



Accurate peak measurements are possible using the in-rush inrush mode, ideal for motor and inductive loads. The 355 also measures voltage and resistance, making it an ideal clamp meter for utility, electrical contractors and industrial service technicians.

The 87V MAX contains all the trusted features of the most popular DMM in use today, the Fluke 87V, with many more extras.



Withstands drops of up to 4 meters (13 feet)

Fluke's most rugged digital multimeter. The 87V MAX features a rugged case for industrial use and a removable holster. This holster also doubles as a test probe holder for one-handed operation.



IP67 rated

Completely waterproof and dustproof, to work reliably anywhere you need to work.



Heat and cold resistant

This meter has a longer operating temperature range from -40 °C (for up to 20 minutes) to +55 °C.



Another product highlight

- True-rms ac current and voltage for accurate measurements on non-linear signals

- Measures up to 1000 V ac and dc

- Measures up to 10 A (20 A for 30 seconds)

- Frequency up to 200 kHz

- Built-in thermometer allows you to freely take temperature readings without having to carry a separate instrument

- Min/Max/Average recording, plus 250 µs Peak min-max to record variations automatically

- Unique function for accurate measurement of voltage and frequency in variable frequency motor drives and other electrically noisy equipment

- Large digit display, 2 brightness levels, white backlight, and backlit keypad keys for better visibility

- High resolution 19,999 digit mode display

- Long lasting battery life (800 hours)