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

Keep yourself safe. Find hidden problems faster. Put the paperwork down.



Fluke Connect + Fluke's 1587 FC Insulation Multimeter helps you identify tough problems, fix, and wirelessly communicate your work quickly and easily - all at a safe distance.



Add diagnostics with Fluke Connect

The Fluke 1587 FC is Fluke Connect-enabled so you can download the free Fluke Connect® Measurements app to your smartphone and gain additional functions, including:

- Safety first. Keep yourself out of harm’s way by monitoring your test measurements remotely.

- Prove your job is done right by quickly seeing and sharing measurement results wirelessly with your smartphone.

- Quickly find problems by saving and comparing measurements over time on a wireless device.

- PI/DAR timed ratio tests with TrendIt™ graphs to identify moisture and contaminated insulation problems faster

- Memory storage through Fluke Connect that saves measurements to your phone or the cloud and eliminates the need to write down results. Reduces errors and saves data for historical tracking over time

- Temperature compensation to establish accurate baselines and relevant historical comparisons

- Historical tracking and trending of assets to identify insulation degradation over time and allow real-time decisions to be made in the field with Fluke Connect® Assets (sold separately)

- Provides memory storage through Fluke Connect Measurements to eliminate the need to write down results

- Includes live circuit detection to prevent insulation test if voltage >30 V is detected

- Supports historical tracking and asset trending of assets to identify degradation over time with Fluke Connect® Assets (sold separately)

- Incorporates VFD low-pass filter for accurate variable frequency motor drive measurements

- Includes auto-discharge of capacitive voltage for added user protection

- Measures ac/dc voltage, dc millivolts, ac/dc milliamps, resistance, and continuity

- Includes capacitance, diode test, temperature, min/max, frequency measurements and insulation test smoothing reading

- Automatically powers off to save battery power

- Comes with remote probe, test leads, alligator clips, K-type thermocouple, hard case, and three-year warranty.

The ACDC-54NAV clamp-on power meter offers AC/DC current measurements to 1000 A, AC/DC voltage to 1000 V, temperature capabilities, and wide jaws to handle large conductors up to 1.6″ (40 mm) for high voltage industrial environments.



This clamp-on multimeter offers a full range of power quality diagnostics including power and power factor, total harmonics distortion, individual harmonics, in-rush current, phase sequence, TRMS and low pass filter for industrial power monitoring and verifying system conditions.

When you invest in your Fluke test tools, you want your money to go as far as possible. Fluke Premium Care is a paid offering that provides coverage above and beyond the original product warranty, so you don’t need to worry about unexpected downtime caused by damaged test equipment, accessories, or tools in need of calibration or repair.

Fluke ii905 Acoustic Imager with LeakQ™: Detect, Locate, and Assess Gas Leaks
The Fluke ii905 Acoustic Imager equipped with LeakQ™ acoustic leak detection technology empowers maintenance teams to efficiently detect, locate, and assess gas and vacuum leaks. Whether you're dealing with compressed air systems, pipelines, or industrial equipment, the Fluke ii905 provides valuable insights to optimize your operations.

Key Features
• Ready-to-Use: The Fluke ii905 comes ready out of the box. Its rugged, ergonomic design ensures easy handling, while the large 7" LCD display provides clear leak visualization.
• Quick Detection: Even users with minimal experience can start detecting leaks within minutes. The tool estimates leak size and cost, incorporating a new distance-estimation feature and the 1-10 LeakQ™ severity index.
• SoundMap™ Overlay: The 7" LCD touchscreen overlays a SoundMap™ on visual images, facilitating rapid leak location identification.
• Intuitive Interface: Easily isolate leak sound frequencies and filter out background noise.
• Tagging and Organization: Use image and video tagging, annotation, and folders for efficient organization.
• Leak Sizing: Prioritize repairs based on leak size.
• Collaboration: The reporting tool allows seamless sharing of visuals, tagging, and notes with team members and repair personnel.

Money-Saving Insights:
Did you know that a 100 hp air compressor can consume around $50,000 in electricity annually? Shockingly, up to 30% of that electricity is wasted due to pressurizing airlines that leak. Many facilities overlook assessing the efficiency of their compressed air systems, leading to unnecessary capacity additions. The Fluke ii905 helps you identify leaks, optimize energy usage, and reduce costs.

LeakQ™ Mode:
Automatic Distance Estimation: When a leak is detected, the imager determines the distance to the target (indicated inside the circle on the display). The LeakQ value on the screen reflects the leak's size, based on measured dB SPL value and distance.

Comprehensive Reporting:
The LeakQ reporting tool combines data from your Fluke ii905 Acoustic Imager with direct inputs to create organized and detailed reports. These reports guide repairs, confirm fixes post-repair, and document the inspection process and results.
LeakQ online reporting tool
• Local PC installed application
• No Leak Type selection (should be included at the time of capturing the measurement)
• Offers customization of reporting template

Key features
• Easy, fast, and safe visual detection of compressed gas leaks with LeakQ™️ mode including estimated leak size and cost.
• The 7" LCD touchscreen overlays a SoundMap™️ on visual images, facilitating rapid leak location identification.
• The integrated visual- and textual tagging and annotation functionalities offer important details to optimize reporting and follow-up actions.
• On-the-go wireless upload to Fluke Connect