INTERAPP ES2.PFF31接近开关是一种无需与运动部件进行机械直接接触而可以操作的位置开关，当物体接近开关的感应面到动作距离时，不需要机械接触及施加任何压力即可使开关动作，从而驱动直流电器或给计算机（plc)装置提供控制指令。接近开关是种开关型传感器（即无触点开关），它既有行程开关、微动开关的特性，同时具有传感性能，且动作可靠，性能稳定，频率响应快，应用寿命长，抗干扰能力强等、并具有防水、防震、耐腐蚀等特点。

INTERAPP The ES2.PFF31 proximity switch is a position switch that can be operated without direct mechanical contact with the moving parts. When the object is close to the sensing surface of the switch to the operating distance, no mechanical contact is required and any pressure is applied So that the switch action, which drive the DC electrical appliances or to the computer (plc) device to provide control instructions. The proximity switch is a kind of switch type sensor (that is, no contact switch), it has both trip switch, micro switch characteristics, but also has sensor performance, and reliable, stable performance, fast frequency response, long life, anti-interference Strong ability, and has a waterproof, shock, corrosion and other characteristics.