TIRE PRESSURE SENSOR AND AUTOMOBILE TIRE

The tire pressure sensor includes: a housing, a fixed base being provided in the housing; the fixed base being provided with an accommodation recess having an upward opening; a vent hole penetrated to the exterior of the housing being provided on the bottom wall of the accommodation recess; a circuit board fixed in the housing and being provided with a tire pressure detection chip an elastic sealing member located between the bottom wall of the accommodation recess and the tire pressure detection chip, and being used for sealing a gap between the bottom wall of the accommodation recess and the tire pressure detection chip, and the elastic sealing member being provided with a communication hole communicated with the detection hole and the vent hole; and a flexible sealant filled between the accommodation recess and the tire pressure detection chip, and between the accommodation recess and the elastic sealing member.