3 wire open square Inductive Proximity Sensor Switch for cnc router

5pcs square Inductive Proximity Sensor Switch for cnc router Proximity sensor designed for cnc router machine,traditional limited switch will occur phenomenon of running over travel because of coasting motion ,but the precision of proximity sensor will be higher than contact type switch,to avoid this phenomenon and protect screw ball and nut. Model : SN04-N Product name : proximity sensor appearance Square : 18*18*36mm Detection distance: 5"> (mm) Detection of objects :mental