Capacitive proximity sensors (CPS) are sensing devices designed to detect both metallic and nonmetallic targets . They can detect lightweight or small objects that cannot be detected by mechanical limit switches. https://youtube.com/shorts/9WT5GNOCiN4? Specifications: Wire type and power AC 2-wire type 100-240VAC~ Sensing side diameter M18 Sensing distance 8mm Standard sensing target 50×50×1mm(iron) Response frequency 20Hz Current specification Leakage current: Max. 2.2mA Control output Normally Open Material Polyamide 6 Protection structure IP66 Environment_Ambient temperature -25 to 70℃, storage: -30 to 80? Environment_Ambient humidity 35 to 95% RH, storage: 35 to 95% RH Hysteresis(distance) Max. 20% of the sensing distance Weight Approx. 82g(approx. 70g) Package Includes: 1 x  Autonics CR18-8AO Capacitive Proximity Sensor