The main purpose of editing proximity switch in aviation, space technology and industrial production have a wide range of applications. In everyday life, such as automatic doors in hotels, restaurants, garage, automatic hot air on both applications. In terms of security, security, such as data files, accounting, finance, museum, treasury and other powerhouse, are usually equipped with anti-theft device composed by a variety of proximity switches. In the measurement technology E, such as length, measurement locations; in control technology JC-D5PK, such as displacement, velocity, acceleration measurement and control, also using a large number of proximity switches. Capacitive proximity switches measure of such a switch is typically a plate constituting the capacitor, while the other plate is the switch housing. The housing is usually during the measurement with the device chassis ground or connected. When an object is moved close to the switch, regardless of whether it is a conductor, due to its proximity, to make the total capacitance of the dielectric constant is changed, so that the capacitance change, so that the circuit connected to the probe status and also will be change, whereby the switch can be turned on or off of the control. Such proximity switch detected object is not limited to the conductor, the insulation can be a liquid or powder and the like. NJK-5002C (8002C) 6-36DC / 3-wire / Limited provided by the people on the Shenyang Electric. Shenyang Electric Co. on people (www.zsmsy.com) strong, credible, in other industries, such as Shenyang, Liaoning province has accumulated a large number of loyal customers. The company better work attitude and constantly improving people and innovative ideas will lead you to walk hand in hand on the Shenyang brilliant, for a better future!