Sealey Pocket Brake Fluid Tester

The Sealey Pocket Brake Fluid Tester is a compact electrolytic tester designed for quick, accurate assessment of brake fluid moisture content in automotive applications. This diagnostic tool uses integrated circuitry to measure the electrical resistance of brake fluid and compare it against acceptable limits, providing immediate feedback on fluid condition. The tester features a straightforward operation—simply switch on and insert the probe into the brake fluid reservoir for an instant result displayed via three LED indicators. This enables mechanics and technicians to quickly determine whether brake fluid has absorbed excessive moisture and requires replacement, helping to maintain optimal braking system performance and safety. Built for convenience, the unit includes easy calibration checking using water to verify accurate operation. A dedicated red LED provides a low battery warning, ensuring reliable performance when you need it. The tester is powered by a single AAA battery, which is supplied with the unit, and its ultra-lightweight 0.03kg design makes it ideal for carrying in a pocket or toolbox.