Sealey Brake Fluid Tester Electrolytic

Comparative electrolytic type tester. Checks moisture content of fluid by resistance to electric current. Easily calibrated using new brake fluid. Audible test cycle with four LED read-out. Just insert probe and press button for immediate result. Buzzer sounds to warn when battery is low and needs replacing. Uses 9Volt cell - not included.

Moisture Content:

Green: <0.5%

Yellow: 0.5-3.5%

Red: >3.5%