6512CBrake Fluid Tester for DOT3, DOT4 and DOT5.1


This device is used to test the quality of brake fluid, which includes DOT3, DOT4, and DOT5.1 brake fluid. The tester will indicate the water containing by LED indication.


  • Suitable for DOT3, DOT4 , DOT5.1
  • Battery: 1.5V AAA
  • With CE and UKCA Approval.


  • Take off the cap of the tester. Press the power button to switch on the power. The green LED shall light up when the power is on; if not, please change the battery.
  • Put the metal testing probe into the brake fluid fully, the LED will indicate the result within 1 second.
  • Press and hold power button for about 1 second to switch the category of the brake fluid.
  • The tester will automatically shut off after 20 seconds.
  • Green LED: Battery OK / Brake fluid has no water containing.
  • Yellow LED: Less than 1 % of water content in brake fluid. Low percentage of water. Check again within 6 months.
  • RED LED: Less than 2 % of water content in brake fluid. Please change the brake fluid.