• Auto brakes calibration for DOT 3, DOT4, and DOT 5
  • LEDs indicating the quality of the Brake fluid
  • Quick and easy way to test for moisture content in the Brake fluid
  • Measurement range from (0-3%) moisture contain in the Brake fluid
  • Power supply: 1.5V button cell, LR44 or Equivalent, 3 piece
  • Fit type: Universal Fit

So far has worked well. Tested a few different cars. They all came up green, so thought maybe it doesn't do any other color. So added a drop of water to some brake fluid in a cup and tested again. This time it was Red. It has 3 different l.e.ds that light up according to the condition of the brake fluid. Green, yellow and red. They refer to the water content in the fluid, Which is on the packaging. The tester itself only has good, okay, Bad on it. The tester takes 3 LR44 batteries which are included. There are no directions on how to use but should be easy to figure out. Mine is new so I have not seen the issue about the electrodes coming out. Future edit if that happens.

This brake fluid tester is really spot on. I have done several test to check its accuracy and each time it gave the correct reading. I also used it after testing brake fluid boiling points with a unit that measures the boiling temp to determine if the fluid is bad, and I can tell you that again this unit performed good. I see some similar testers did not get good reviews. It could have been the unit or the person doing the testing. I can tell you this unit works. The only drawback to this unit is that it does not come with batteries. It takes LR44 (3) batteries.

Great for the money. Doesn't fall apart like the other one in this price range. Can be set for dot 3,4 and 5.1. I use to test castol SRF and added a couple droplets of water to a bottle with about an 1oz of fluid left. Went from green to red so it worked.

Cost-effective unit and works after multiple use (so far). I was able to determine classic Porsche's fluid quality: lite-up red while other vehicle good (i.e. green light).

Bmw motorcycles abs pump does not put up with old fluid well at all. Keep on top of with this and save a big chunk of money

This little guy makes me a bunch of money in the shop

It works and it gave me a second opinion on my brake fluids.

Great price and easy to use.

Read instructions to test your specific take fluid. Works well and easy to read.