uxcell 4mm Inductive Proximity Sensor Switch Detector NPN NO DC 6-36V 200mA 3-Wire SN04-N Rectangular Type for 3D Printer Probe Bed Leveling,MCU Board: Amazon.com: Industrial & Scientific
Amazon.com: Twidec/10mm Hall Effect Proximity Sensor Inductive Switch NPN NO(Normally Open) with Magnet DC5-30V NJK-5002C : Industrial & Scientific
Amazon.com: Taiss 2PCS M12 4mm Sensing DC 5V NPN NO(Normally Open) 3D Printer LJ12A3-4-Z/BX-5V Cylinder inductive Proximity Sensor Switch Work Voltage 5VDC Special for MCU : Industrial & Scientific
Amazon.com: URBEST® 8mm Detecting Distance Approach Sensor Inductive Proximity Switch NPN NO DC 6-36V Cylinder Type : Industrial & Scientific
Amazon.com: DIGITEN 4 Digital Blue LED Tachometer RPM Speed Meter + Hall Proximity Switch Magnet Sensor NPN + Sensor Mounting Holder for Lathe Conveyor Belt : Industrial & Scientific
Amazon.com: uxcell 5mm Inductive Proximity Sensor Switch Detection NPN NO DC 6-36V 300mA 3-Wire LJ18A3-5-Z/BX for 3D Printer Probe Bed Leveling,MCU Board : Industrial & Scientific
DC NPN 4-Wire NO NC Nomal Open/Close Proximity Sensors 4m Body M12: Amazon.com: Industrial & Scientific