Brake Fluid Tester Pen For Cars, Quick Car Brake Diagnostic Tool With 5 LED Indicators, Oil And Fluid Analyzer For DOT 3 DOT 4 DOT 5.1 Brake Fluid, Auto Hydraulic Liquid Content Detector
✔️ Five LED bars show 0% to >4% water content; single unit pack
This compact, portable brake fluid tester pen checks water content in DOT 3, DOT 4, and DOT 5.1 brake fluids, helping maintenance crews and DIYers keep brakes safe across sedans, trucks, and SUVs.
✅ Measures water content via electrical conductivity in brake fluids DOT 3/4/5.1
✅ Five LED indicators show water ranges 0%, under 1%, under 2%, under 3%, and over 4%
✅ Brass-plated probe resists corrosion; sturdy plastic body for impact resistance
✅ Size 6.0" × 0.8" (152.4 mm × 20.32 mm); works 9 V to 15 V
✅ Includes a pocket clip for handy access and easy carry
💡 What is a brake fluid tester pen and how can it help with brake system maintenance?
The handy tool lets you quickly check brake fluid for water content, helping prevent brake fade and ensure safety by prompting timely fluid changes.
- handy brake fluid tester pen for DOT 3 DOT 4 DOT 5.1 fluids
- conductivity-based readings with clear LED readouts to show 0-4% content
- compact, clip-on design for easy carry and quick field checks