Sensor, tire and vehicle

The embodiment of the utility model provides a sensor, a tire and a vehicle, the sensor comprises a main body, the main body is internally provided with an accommodating space, the main body is provided with an air channel, one end of the air channel is communicated to the outside, the other end of the air channel is communicated to the accommodating space, and part of the air channel forms at least one Tesla valve. Therefore, the containing space in the shell assembly can be communicated with the outside through the air channel in the main body, detection of external pressure intensity changes is facilitated, and meanwhile the sensor is simple and reliable in structure and low in production cost.