FLUKE-BT521 Battery Analyser 7.4 V

Fluke

Product Information

The FLUKE-BT521 is a high-quality, advanced Battery Tester designed to accurately diagnose the health and status of rechargeable batteries of different sizes and chemistries. With its advanced testing capabilities and intuitive user interface, it is  an excellent  device for professionals who need to ensure the performance and reliability of critical battery-powered systems.

For Battery Size:
All Sizes
For Battery Chemistry:
All Chemistries
Model Number:
BT521
Checking for live stock

The Fluke BT521 is a professional-grade battery analyser developed for comprehensive maintenance of stationary battery systems across all chemistries. It measures internal resistance, voltage, ripple, temperature and current to evaluate the health of VRLA, Ni-Cd, lithium-ion and other battery types. Built with a rugged chassis (~850 g) and USB/mobile connectivity for data logging, this tester streamlines the inspection of battery banks, backup power supplies, and industrial energy storage systems.

Standout Features and Benefits of the Fluke Battery Tester for All Chemistries

  • Supports all major battery chemistries (VRLA, Ni-Cd, lithium-ion) for broad application coverage.
  • Measures very low internal resistance (down to 0.001 mΩ) with high accuracy (0.8 % +6 for 300 mΩ range), enabling early fault detection.
  • DC voltage measurement up to 600 V (max 1000 V) for extensive battery string diagnostics.
  • IR-temperature sensing via the intelligent probe (BTL21) automatically captures negative post-temperature and provides integrated thermal monitoring.
  • Built-in sequence and logging functionality: up to 100 profiles, 100 templates, storing 450 batteries per profile for large-scale systems.
  • Rugged industrial design meeting CAT III 600 V safety, IP40 rating, and lithium-ion battery power for portable field use.

Prepared for Critical Power Battery Analysis

The BT521 is engineered for high-precision battery diagnostics where reliability, trend analysis and repeatability are essential. Its low-impedance injection method enables accurate resistance & strap evaluation even on large battery strings. Advanced logging and reporting features allow maintenance engineers to track performance over time, identify degrading cells or inter-cell connections, and deliver actionable data.

Application Versatility of the Battery Analyser

  • Testing standby battery banks in data-centres and UPS systems for state-of-health, internal resistance and voltage decay.
  • Measuring inter-cell strap resistance and individual cell performance in large-format VRLA or lithium-ion racks.
  • Monitoring ripple voltage and battery temperature in rectifier/charger environments.
  • Creating maintenance records and trend reports for battery fleet management in industrial and utility installations.

pdf icon
Application Note(Technical Reference)
pdf icon
Fluke 500 Series Technical Data(Technical Reference)
pdf icon
Fluke BT521 User Manual(Technical Reference)
pdf icon
UN38.3 Lithium Battery Test Summary(Technical Reference)
pdf icon
Datasheet - FLUKE-BT521(Technical Reference)
pdf icon
Guide - FLUKE-BT521(Technical Reference)

Reviews

  • Rinaya Edroso
    16 Feb 2023

    This meter is the perfect size for what I used it for and it also reminds me why I don't buy Fluke meters. It's not because they don't work, it's because I had this for a full day before someone decided against it. I need it more and they needed it more than I did but I will probably order another one soon as this meter was perfect.


  • David Jordan
    16 Feb 2023

    The item feels very comfortable in the hands, easy to use. I recommend it


  • Aurore Dresser
    16 Feb 2023

    Arrived early works very well cheap and good.



FAQs

Yes. We ship FLUKE-BT521 Internationally to many countries around the world.
Yes. You can also search FLUKE-BT521 on website for other similar products.
We accept all major payment methods for all products including ET13878421. Please check your shopping cart at the time of order.
We use our internationally recognized delivery partners UPS/DHL. Collection of ET13878421 can also be arranged for the customer by international shipments through contacting our customer support team. Additionally, you can also search"Fluke" products on our website by using Enrgtech's Unique Manufacturing Part Number ET13878421.
You can order Fluke brand products with FLUKE-BT521 directly through our website or call us at +44 (0) 3303 800 157 or email our support team at sales@enrgtech.co.uk.
Yes. Our products in Battery Testers category are shipped in lowest possible time.
You will get a confirmation email regarding your order of FLUKE-BT521 Battery Analyser 7.4 V. You can also check on our website or by contacting our customer support team for further order details on FLUKE-BT521 Battery Analyser 7.4 V.