Brake Fluid Tester Pen With 5 LED Indicators Quick Water Content Check For DOT 3 DOT 4 DOT 5.1 Brake Fluid High Precision Diagnostic Tool For Your Car Care And Smooth Braking

Brake Fluid Tester Pen - 1 PCS with 5 LED Indicators
✔️ Measures water content with five LED indicators for clear status

This brake fluid tester pen is a handy diagnostic tool that quickly checks water content in brake fluids to help maintain brake performance. It’s commonly used in automotive maintenance and by DIY enthusiasts to prevent corrosion and brake failure.

✅ Material: Brass-plated metal probe and plastic shell
✅ Waterproof plastic housing for reliable performance in diverse environments
✅ Five LED indicators show water content levels clearly
✅ Compatible with DOT 3, DOT 4, DOT 5.1 brake fluids
✅ Battery powered (AAA, not included) with auto-shutdown after 12 seconds
✅ Weight: 27 g; Size: 6.0×0.8 inches

💡 What is a brake fluid tester pen and why would I need one for DOT 3, DOT 4, and DOT 5.1 fluids? This handy device helps monitor brake fluid water content and decide when to replace. - It uses a brass-plated metal probe for accurate, corrosion-resistant measurements
- Five LED indicators clearly show safe, caution, or replace-needed levels
- It runs on AAA batteries (not included) and auto-shuts down after 12 seconds of inactivity

✝️