The production process of the automobile is mainly composed of seven processes: casting, forging, cold stamping, welding, metal cutting, heat treatment and assembly. The welding process is generally completed in the welding shop, and is also an indispensable part of the car production process. Due to the large number of production lines and high intelligence in the welding shop, the sensors for non-contact detection are very large, especially inductive sensors, which are mostly used to locate the body in the process of body welding. However, due to the complicated use of welding equipment and working conditions, the selection of sensors has always been a problem for customers. Originally, the factory used other manufacturers' sensor shell materials to resist welding slag accumulation and poor temperature performance. In the process of use, the spot welder will cause slag splash when it is welded at high temperature, often in the sensor sensing surface and outer casing. There is welding slag accumulation. Since the welding slag is a metal substance, once it is accumulated too much, it will disturb the external magnetic field generated by the internal coil of the sensor, thereby causing the detection failure of the sensor. Meanwhile, at the time of high temperature welding, the temperature of the slag is usually high, which may cause the sensor casing and the inside. Damage to the circuit can severely shorten the life of the sensor. In addition, there are many electric welding equipments in the welding production line, the use environment is relatively complicated, and a large amount of electromagnetic interference is generated, which often causes the sensor to malfunction, thereby seriously affecting the normal use of the inductive sensor. Therefore, the field personnel proposed a sensor that requires anti-welding slag accumulation and strong resistance to magnetic field interference to prevent malfunction and damage. Turck technicians recommended the anti-weld spark splash with Teflon coating and the anti-strong magnetic field interference UPROX+ with the full understanding of the automotive industry process and the in-depth communication on the above requirements and working conditions. Product: NI20U-MT30-AP6X-H1141, successfully solved the customer's problems. The new UPROX+ series of sensors with Teflon coatings are made by German advanced technology to uniformly and seamlessly plate Teflon onto the entire housing, sensing surface and mounting accessories. The high temperature resistance of the Teflon coating allows the sensor to withstand high temperature welding sparks; and once the slag splashes onto the Teflon coating, it will fall immediately. With this feature, the sensor minimizes the accumulation of slag. Therefore, the internal circuit is effectively protected from damage, and the occurrence of induction failure caused by welding slag accumulation on the sensor sensing surface is also avoided. At the same time, the NI20U-MT30-AP6X-H1141 sensor is also one of the new UPROX+ series sensor series products, with all the advantages of this series of sensors, due to its patented flexible ferrite-free core coil, plus special internal shielding. The treatment effectively prevents the interference of the strong magnetic field during the welding process, completely avoids the malfunction of the sensor, thereby realizing the precise positioning of the vehicle body during the welding process. After the model was selected, the test run test was carried out at several installation locations on the site. The operation effect was very good, and the welding slag could not form a pile on the sensor surface, which satisfied the customer's use requirements. For the automotive welding process, the new UPROX+ series with Teflon coating has a wider application space. First, through the repeated dynamic welding spark test, the copper shell and the Teflon coating can effectively resist the welding slag adhering to the sensor surface, and also enhance the local temperature resistance of the sensor. The earth prolongs the life of the sensor, which greatly reduces the cost of purchasing customers. Second, the series combines all the advantages of the UPROX+ series: a rich housing form that is easy to install; a high degree of protection for IP68; excellent electromagnetic compatibility; and extremely high immunity to electromagnetic interference. Thus, in the strong electromagnetic interference environment of the automobile welding process, the sensor is still easy to use. This greatly reduces the customer's selection time and improves work efficiency. Third, the UPROX+ series can replace multiple traditional models with a new model of sensor, which allows customers to use fewer types of sensors to meet the needs of all production applications and reduce the amount of spare parts. In particular, the automotive industry has more requirements for use and complex applications. UPROX+ series products can be used to avoid additional costs for special models. In summary, the excellent characteristics of the copper-plated Teflon shell anti-weld slag accumulation combined with the advantages of the new UPROX+ series products against strong magnetic field interference, the new UPROX+ series with Teflon coating can be said to be the automotive welding shop. A tailor-made product that solves the problem of using the sensor in the automotive welding shop. 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