Brake Fluid Tester Pen: 3-second safety check, instantly detects dangerous moisture levels (0%-4%) in DOT 3/4/5.1 brake fluid – prevent brake fade or failure before it happens
Pro - Grade Precision: Dip the twin probes, read %H₂O on the 3-digit HTN screen—green <1.5 % safe, yellow 1.5–3 % watch, red >3 % danger + loud beep - your urgent reminder to replace fluid immediately
Pocket-Ready: High-Precision brake fluid moisture tester compact 15 cm, 50 g design fits anywhere. side clip slides onto pocket, glovebox, or tool belt
Universal Fit: Precision car brake fluid detector Calibrated for DOT 3, 4 & 5.1 fluids—works with any brand, any car, bike, truck or e-scooter
Note: Powered by 1 AAA battery (Not included) auto 1-min sleep saves AAA battery for up to 1 year of weekly tests