Review on Accurately Test Your Car'S Brake Fluid With Our High Precision Brake Fluid Detector - LCD Screen, Audible Alarm, Suitable For DOT3 DOT4 DOT5.1 Fluids by Tim Pulse

Bought this version over other testers because it had a flexible, slim probe design that lets me snake it into my hard to reach brake fluid tank. The light on it is also really helpful in letting you know how far in the tank you are.Unfortunately I don't trust the readings from it. Tried it on both my cars and only indicated green. As a control, tried it in a glass of water. Read back yellow, which is 2% water content. It did make me temporarily question what percent water content my glass of water was