M30 Flush Inductive Proximity Sensor – 10mm Shielded Detection (0-9.6mm Reliable), M30×1.5 Thread, DC 3-Wire/4-Wire NPN/PNP, 10-30VDC
M18 Cylindrical Ultrasonic Sensor UM18 Series – 300/500/800mm Liquid Level Switch, NPN/PNP & 4-20mA / 0-10V, IP67
M6 Flush Inductive proximity sensor
M30 Flush High Temperature Proximity Sensor – 10mm Embedded Detection, M30×1.5, Heat Resistant, NPN/PNP NO/NC, IP67
TL-N10M Series Square Proximity Switch
M18 Magnetic Switch Sensor