NPN proximity sensor is a new kind of device that will detect the object without making physical touch contact. It is executed on the principle of non-contact and does not harm using an npn transistor output whether fulfillment in many roles like searching materials, all sorts of mechanized system at work dial also machines steadiness. This uses some of the recent technological advances, like high object detection capability and variable ranges in detecting objects & it can be put to multiple types of control systems. The criterion therefore for using npn proximity sensors is highlighted at different levels. The caption indicates the many possibilities for its applications: Manufacturing, Robotics and Logistics. … NPN proximity sensor is designed mainly to serve two functions, it can help you get better performance for your work even in hostile environments with high reliability and an integral aspect of all modern industrial occupations.