They are part of the braking system. The drumbrake is a kind of brake in which the friction iscaused by a pair of brake shoes that press againstthe inner surface of a rotating drum, which isconnected to the shaft or the wheel

Brake sensor is an important part of automobile safety system ‌ they can monitor the parameters of the brake system in real time, such as ‌ wheel speed and pressure in the gas tank ‌ to ensure the effectiveness and safety of the brake system.