Buy Brake Fluid Tester 5 LED Car Brake Fluid Moisture Tester from Zapals Just at $5.99. Stay safe and know that your car is in top condition is most important. Ideally, brake fluid should be checked regularly and changed every one to two years. As moisture seeps into the brake system through the brake hoses and seals the brake fluid will become contaminated and the danger of brake failure will increase. This pen-shaped brake fluid tester can easily help determine whether it's time for you to change your brake fluid.
Developed for professional use in automotive repair shops and servicing. Brake fluid detection pen is based on the change in conductivity to determine the moisture change brake fluid. It shows clearly the extent of moisture contained by the light-emitting diode. The high moisture content will lead to a lower boiling point, affect braking performance.