MT300 Portable Pen Shape Brake Fluid Detector

Green: Battery OK, i.e.: No water contained in the brake fluid.
Yellow: Less than 1% of water content in brake fluid.
Yellow/yellow: Approx. 2% of water content in brake fluid.
Yellow/yellow/red: Approx.3% of water content in brake fluid. The brake fluid should be changed.
Yellow/yellow/red/red: At least 4% of water content in brake fluid. The brake fluid must be changed urgently! Extreme danger!
Battery (incl): One 1.5V , type  AAA

Ready for Brake Fluid Test

Unscrew the brake fluid reservoir, and pull off the cap of the Brake fluid tester. Dip the test probes into the brake fluid up to the plastic rim of the device.

To Check Fluid Quality

Press the button for power on, green LED will light up. Insert the tester into reservoir for one second then the test result will be correctly indicated by LEDs. Repress the button for power off. The tester will automatically power off after about 15 seconds of inactivity.