The project objective was the development and production of a brake fluid tester with fully automatic test sequence for the automotive industry. With the help of the tester it can be decided whether the brake fluid continues to perform its function or whether it needs to be replaced. The boiling point method was chosen to measure the values. The power supply as well as the transmission of the measured data to be evaluated to a PC is wireless. With the additional LCD display on the brake fluid tester the temperature can be read directly. The connection of different sample needles is possible.