Working mechanism rotary sensor soft iron magnetic sensors, coils and permanent magnets stationary. Measuring gear made of magnetic material mounted on the rotating member under test, each turn of a tooth, measured changes in magnetic resistance formed between the first gear and soft iron, the magnetic flux also changes once. Electromotive force induced in the coil change in frequency (pulses) equal to the measured speed of gear teeth and on the product. Hall Hall effect sensors ⒈ semiconductor or metal sheets are placed in a magnetic field of automotive sensors, when a current (magnetic field perpendicular to the sheet plane direction) flows, electromotive force is generated in a direction perpendicular to the magnetic field and electric current, a phenomenon known as the Hall effect. ⒉ Hall element germanium material commonly Hall (Ge), silicon (Si), indium antimonide (InSb), indium arsenide (InAs) and so on. N-type germanium is easy manufacturing, Hall coefficient, temperature performance, good linearity; linearity of the P-type silicon of the best, Hall coefficient, temperature performance with N-type germanium automotive sensor technology, but the electron mobility of the lower automotive sensor voltage, with a load capacity of the poor, usually do not make a single Hall element. In order to ensure production quality, the device needs to have some statistical production process capability, and help reduce the production of quality degradation problems due to human factors. Integration, intelligence is the development trend of automobile sensors. If only the final effect sensor detection test car, we found the problem too late, so often test will and interactive production process. Thus, on the one hand it requires test equipment and other equipment on the production line good convergence, on the other hand enables information and data sharing between devices. Automotive Sensor picture | Xinfeng (certified) | Henan Xinxiang automotive sensors provided by the sensor Xinfeng purification technology Limited. Xinxiang City, Xinfeng purification Sensing Technology Co., Ltd. (www.xfcgq.com) (www.xfcgjh.com) is a leader in Xinxiang, sensors, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum Limits to meet customer needs. In Xinfeng leadership with the staff warmly welcome all inquiries negotiations to create a better future Xinfeng.