Brake Fluid Tester Pen With 5 LED Indicators For DOT 3 DOT 4 DOT 5.1 Fluids For Car Hydraulic Oil Analyzer Automotive Diagnostic Tool For Moisture Level And Water Percentage Easy Brake System Health Check

Brake Fluid Moisture Tester Pen with 5 LEDs for DOT 3/4/5.1
✔️ 1 PCS tester with five LEDs for DOT 3/4/5.1 fluids, quick health check

The Brake Fluid Tester Pen is a compact handheld diagnostic tool that measures the water content in brake fluid. It is designed for quick, on-site checks in cars, trucks, and light commercial vehicles. Use it during routine maintenance or before a brake service to ensure the system remains safe and effective.

✅ Material: Brass-plated metal probe resists corrosion; durable black plastic body with water-resistant finish.
✅ Compatibility: Works with DOT 3, DOT 4, and DOT 5.1 brake fluids across most vehicles.
✅ Readout: Five LED indicators show readings: 0%, <1%, 2%, 3%, or >4%.
✅ Easy operation: Remove cap, dip tip in reservoir, press button; read in ~1 second and auto power-off after 12 seconds.

💡 What is a brake fluid tester and how can it help maintain braking safety?

This handy device lets you monitor brake fluid moisture to prevent brake failure. - Moisture content monitoring with 0%, <1%, 2%, 3%, >4% - Five LED indicators provide quick, color-coded readings - Compatible with DOT 3, DOT 4, DOT 5.1 brake fluids - One-second reading, auto power-off after 12 seconds; AAA battery not included ✝️