E2E-CR8C1 proximity switch because the displacement sensor according to different principles and different methods to make, and different displacement sensor for object "perception" approach is also different, so common proximity switches are the following: Eddy proximity switches, capacitive proximity switches, Hall proximity switches, photoelectric switches tap into pyroelectric proximity switches, other types of proximity switches main purposes are: proximity switch in the aviation, aerospace technology, and industrial production have wide applications . In everyday life, such as automatic doors in hotels, restaurants, garage, automatic hot air are applied. In security, security aspects, such as data files, accounting, finance, museums, vaults and other powerhouse, are usually equipped with anti-theft device composed by a variety of proximity switch. In the measurement technology, such as length, position measurement; in control technology, such as displacement, velocity, acceleration measurement and control, and uses a large number of proximity switches.