A pressure sensor assembly is provided for fitting within the valve stem of a vehicle tire. The assembly comprises a substrate assembly defining a plurality of holes. A pressure sensor and a temperature compensation sensor are mounted to the substrate assembly. Each sensor includes a deflectable membrane...http://www.google.com.tw/patents/US20090025481?utm_source=gb-gplus-share專利 US20090025481 - PRESSURE SENSOR WITH DUAL CHAMBER COVER
