FLUKE BT521 Battery Analyser with Wireless Communication
The FLUKE BT521 is an advanced battery analyser designed to deliver fast, reliable, and safe testing of stationary batteries and battery banks. Whether you‘re maintaining backup power systems in data centres, telecom facilities, or industrial plants, this tool provides everything you need for complete battery diagnostics and preventative maintenance.
The BT521 works with all major types of stationary batteries—including AGM, gel cell, wet-cell lead-acid, and lithium-ion—ensuring you always get accurate, high-quality data.
Why Choose the FLUKE BT521?
If you need a precise, rugged, and easy-to-use battery analyser, the FLUKE BT521 is an excellent choice. It allows for comprehensive testing with simple controls and wireless connectivity for convenient reporting and trend analysis.
This model comes equipped with Fluke Battery Management Software, which provides powerful tools for reviewing results, comparing profiles, and generating reports. The software helps you manage data from hundreds of batteries in one place.
▶ Unlock the Power - Fast, Smart, Reliable
Key Features of the FLUKE BT521
- Extensive Measurement Capability:
Measure battery resistance, AC/DC voltage, current, ripple voltage, temperature, and frequency — all with high accuracy and ease - Wireless Communication:
Connect via Bluetooth for remote viewing and data sharing. Use the Fluke Battery Analyse app on iOS or Android to email results instantly - Optimised User Interface:
Step-by-step instructions guide you through each test. It ensures correct setup and accurate data capture every time - Automatic and Manual Modes:
Test full battery strings with automatic data storage. The BTL21 probe captures temperature, voltage, and resistance as you go - Comprehensive Logging:
All results are saved during testing and stored directly on the device for later review - Threshold Comparison:
Set custom voltage and resistance thresholds. Get instant visual and audio feedback after each reading to help avoid errors - BTL21 Intelligent Probe Set:
Includes an LCD screen, built-in torch, infrared temperature sensor, and intercell strap resistance test — for full diagnostics in one tool - Ergonomic Test Leads:
Coaxial Kelvin pins and a remote SAVE button reduce test time. The 4-wire Kelvin connection eliminates lead resistance errors - Extended Probes:
Reach double-stacked cells or difficult terminals with flexible probe extenders - Long Battery Life:
The 7.4V 3000mAh lithium-ion battery offers 8+ hours of use on a full charge - Top Safety Rating:
Rated CAT III 600V and up to 1000V DC. Safe for use around all battery power equipment - Easy Report Generation:
Create detailed PDF reports from your PC. Or export quick CSV files from the mobile app — perfect for emailing on the move
▶ Advanced Modes in Action – More Than Just a Battery Tester
Smart Hardware Design
The FLUKE BT521 is built for ease of use in demanding environments. It features a simple rotary dial and well-placed control buttons. Hanging straps on the top and bottom of the unit support various mounting options, including a magnetic hanger or shoulder strap.
A side USB port allows for quick and reliable transfer of measurement data and battery profile information to a PC for detailed analysis. LED indicators show the unit‘s charge level, while the 4-wire Kelvin connection guarantees accurate resistance readings by eliminating voltage drop across the test leads.
Real-World Application
The FLUKE BT521 is perfect for anyone responsible for maintaining power systems that rely on battery backup. Whether you‘re working in facilities management, data centres, critical care hospitals, or industrial sites, it provides:
- Reliable, repeatable test results
- Intuitive operation
- Safe and efficient workflow
- Instant visual and audible feedback to minimise guesswork
The FLUKE BT521 battery analyser offers everything technicians and engineers need for professional-grade battery testing. With its intelligent probes, guided interface, robust safety features, and comprehensive software suite, the FLUKE BT521 ensures fast, accurate, and safe battery analysis every time.
What comes with the FLUKE BT521?
Your FLUKE BT521 package comes with all the accessories you need for instant use:
- FLUKE BT520 Battery Analyser
- 4-Wire Test Pin (Set)
- BTL10 Basic Test lead (Set)
- TL175 TwistGuard Test Leads with Adapter
- 2 x L300 Attachable LED Torches
- BTL21 Intelligent Test Probe Set with Extender and Temperature Sensor
- i410 AC/DC Current Clamp
- Lithium Ion Battery
- AC Charger
- Mini USB Cable
- Shoulder Strap
- Belt Strap
- Magnetic Hanging Strap
- FlukeView Battery Management Software
- Soft Carrying Case
- 2 x Spare Fuses
- 100 x Paper Battery Tags
▶ Precision Testing with Intelligent Technology (BT520 plus BTL-21 Probes)
❓ Frequently Asked Questions (FAQ)
Q1: What types of batteries can the FLUKE BT521 test?
A. The FLUKE BT521 can test all major types of stationary batteries, including wet-cell lead-acid, sealed AGM, gel cell, and lithium-ion.
Q2: Can I use it for full battery strings, or just individual cells?
A. Yes, it supports both. With sequence mode and the BTL21 intelligent test probe, you can test entire strings and automatically store readings with time stamps.
Q3: What software is included with the FLUKE BT521?
A. The package includes Fluke Battery Management Software for desktop and mobile, which enables full reporting, profile comparison, and data export.
Q4: Does it support wireless data transfer?
A. Yes. Wireless communication allows you to download data, display it remotely, and email measurement results using the mobile app.
Q5: Is the FLUKE BT521 safe to use around high-voltage equipment?
A. Absolutely. It meets CAT III 600V and 1000V DC ratings, making it one of the safest analysers available.