Calibrated for cars using DOT 4 brake fluid only.Quick and easy way to test for moisture content in the brake fluid.Takes 1 x AAA/1.5V battery (included).Only takes seconds to know the results.
Press the button for power on, green LED will light up.Insert the tester into reservoir for a second , then the LED lights will indicate the percentage of water in the brake fluid:
Green: None
Green/Yellow: Less than 1%
Green /Yellow/Yellow: Approx. 2%
Green/Yellow/Yellow/Red: Approx. 3% (Time to change brake fluid.)
Green/Yellow/Yellow/Red/Red: Approx. 4% (Change brake fluid immediately!)
