This is tire pressure monitoring System video. This video explains what is tire pressure monitoring system and how it works. Tire pressure monitoring system (TPMS) is safety system that shows the pressure of the tire in real time, so the driver can see the condition of the tire. Here is the video:

The pressure monitoring system device is placed inside the tire.The sensor is placed inside valve down. This device requires low supply, so a 9V battery can be used. Since the TPMS is inside the tire, the micro electronic machine system are needed.