Sichuan Electric Co., Ltd. Yueqing public, professional agents world-renowned industrial, we will do business integrity, high-quality products, quality service for our customers. Contact: Zeng Xin Mobile: 18668703932 Tel: 0577-27776285 QQ: 904813012 works internally generated high-frequency magnetic proximity switch, sent outside by induction facing into any metal will absorb energy in this region, is built-in electronic devices to detect and Estimation listen absorbed energy value. Shu signal shaping and amplification equipment to convert the information into useful signal. Ferromagnetic metal (steel, nickel, cobalt) to absorb most of the energy. These metals can achieve maximum detection distance. 300 Series sizes: Diameter Φ3 (non-threaded) and M4, are flush. This is the smallest on the market integrated inductive sensors. CONTRINEX promote these size standards hitherto only CONTRINEX mastered. All products are 3-wire DC NPN and PNP type. In addition, consistent with NAMUR (DIN / EN19234) 2 linear. All three lines have NO and NC type, all with LED. In addition, all the important protection functions are already built-in, such as short circuit and overload protection, reverse polarity protection, overvoltage protection, EMC protection and power delay (part NAMUR product exception). Without EN60947-5-2 / 7.2.3.1 certified external protection circuitry, can achieve CE standards