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Fluke 1587 vs 1507: Which Insulation Multimeter is Right For You?Β 

Fluke is one of the most trusted names in electrical testing equipment, and when it comes to insulation testers, the Fluke 1587 and Fluke 1507 are two of the most popular choices.

Fluke 1587 FC 2-in-1 Insulation Multimeter, True-RMS, Selectable Insulation Test Voltages Up To 1000 V, Pi/DAR Timed Ratio Tests, Measures Frequency, Includes Low-Pass Filter For Motor Drive VFD

While they look similar and share some core functions, these models are designed for slightly different needs. Let’s explore their features, differences, and which one might be the best fit for your work.

πŸ“‹ Overview of the Fluke 1507

The Fluke 1507 Insulation Tester is a dedicated, straightforward insulation resistance tester. It’s rugged, reliable, and optimized for electricians who need a tool to quickly and accurately test insulation on wiring, motors, and other electrical equipment.

Fluke 1507 Digital Megohmmeter Insulation Resistance Tester, For Advanced Industrial and Electrical Insulation Testing, Offers Multiple Insulation Test Voltages: 50 V, 100 V, 250 V, 500 V, and 1000 V

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Key Features:

  • Test voltages: 50 V, 100 V, 250 V, 500 V, and 1000 V.
  • Insulation resistance up to 10 GΞ©.
  • Automatic calculation of polarization index (PI) and dielectric absorption ratio (DAR).
  • Remote test probe for easier operation.
  • Compact, lightweight design.

Best For: Electricians who primarily need insulation testing without requiring advanced multimeter features.

⚑ Overview of the Fluke 1587

The Fluke 1587 Insulation Multimeter is a 2-in-1 tool, combining a full-featured digital multimeter (DMM) with an insulation tester. It takes everything the 1507 offers and adds more versatility.

Fluke 1587 FC 2-in-1 Insulation Multimeter, True-RMS, Selectable Insulation Test Voltages Up To 1000 V, Pi/DAR Timed Ratio Tests, Measures Frequency, Includes Low-Pass Filter For Motor Drive VFD

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Key Features:

  • All insulation test features of the 1507.
  • Full DMM functions: measures voltage, current, resistance, continuity, frequency, and capacitance.
  • True-RMS accuracy for AC measurements.
  • PI and DAR testing included.
  • Backlit display for better visibility.

Best For: Professionals who want a single tool that covers both insulation resistance testing and full multimeter functionality.

βš–οΈ Fluke 1587 vs 1507: Side-by-Side

FeatureFluke 1507Fluke 1587
Insulation Test Voltage Range50 V – 1000 V50 V – 1000 V
Max Insulation Resistance10 GΞ©2 GΞ©
PI/DAR Testingβœ… Yesβœ… Yes
Multimeter Functions❌ Noβœ… Full DMM functions
True-RMS❌ Noβœ… Yes
DisplayStandardBacklit
πŸ’³ PricingπŸ’²Check PriceπŸ’²Check Price
Remote Probeβœ… Yesβœ… Yes
Best ForDedicated insulation testingAll-in-one insulation + multimeter tool

βœ… Pros and Cons

Fluke 1507
βœ” High insulation resistance range (up to 10 GΞ©)
βœ” Lightweight and easy to use
βœ” PI and DAR testing built-in
βœ” More affordable
✘ No multimeter functions
✘ No backlit display

Fluke 1587 FC 2-in-1 Insulation Multimeter, True-RMS, Selectable Insulation Test Voltages Up To 1000 V, Pi/DAR Timed Ratio Tests, Measures Frequency, Includes Low-Pass Filter For Motor Drive VFD

Fluke 1587
βœ” Combines insulation testing + full multimeter in one tool
βœ” True-RMS accuracy for AC loads
βœ” Backlit display
βœ” Great for troubleshooting beyond insulation testing
✘ More expensive
✘ Lower insulation resistance range (2 GΩ vs 10 GΩ in 1507)

πŸ“ Which One Should You Choose?

  • Choose the Fluke 1507 if you need a dedicated, high-range insulation tester for professional use and don’t need built-in multimeter functions.
  • Choose the Fluke 1587 if you want an all-in-one tool that can handle both insulation testing and standard electrical measurements, saving space in your tool bag.

In short, the Fluke 1507 is the specialist for insulation resistance testing, while the Fluke 1587 is the versatile multitool for professionals who want more functionality in one device.

Fluke 1587 FC 2-in-1 Insulation Multimeter, True-RMS, Selectable Insulation Test Voltages Up To 1000 V, Pi/DAR Timed Ratio Tests, Measures Frequency, Includes Low-Pass Filter For Motor Drive VFD