Surveyors are mainly used in automobile piezoresistive pressure sensor in three areas: engine optimization, injection contr Auto seat sensor is a membrane touch point sensor and touch point was distributed uniformity on the suffer facade of seat, It is use to apperceive system of auto seat, such as safety belt alarm sensor, Taxi meter automatism….We can design to different sensor figure and touch point sensitivity according to shape. rigidity and elasticity of car seat.