Xceptional Choice Brake Fluid Liquid Tester Car Brake Car Oil Level Gauge

According to the variation of electrical conductivity to determine the moisture content of the brake oil change. High moisture will lead to the boiling point is reduced, affect the braking performance Meanings of indicator light: Green: Battery OK, i.e.: No Water Contained in the Brake Fluid Green / Yellow: Less than 1% of Water Content in Brake Fluid Green / Yellow / Yellow: Approximately 2% of Water Content in Brake Fluid Green / Yellow / Yellow / Red: Approximately 3% of Water Content in Brake Fluid; The Brake Fluid Should be Changed Green / Yellow / Yellow / Red / Red: at least 4% of Water Content in Brake Fluid; The Brake Fluid Must be Changed Urgently, Extreme Danger . Note: Remember to dry this tester before using in brake fluid. Package Includes: 1 x Brake Fluid Test Pen(without battery )