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Amazon.com: Hall NPN Sensor, NJK - 5002C Hall Effect Sensor Proximity Switch NPN 3-Wires Normally Open with Magnet : Industrial & Scientific
Amazon.com: PSN17-8DNU, Sensor, Inductive Prox, 17mm Square, 8mm Side Detection, DC, NPN, NO, 3 Wire,10-30 VDC : Industrial & Scientific
Amazon.com: Baomain Capacitive Proximity Sensor Switch LJC12A3-5-Z/AX NPN NC DC 10-30V 200mA 1-5mm Blue : 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
Amazon.com: uxcell a11021800ux0169 SN04-N DC 10-30V 200mA NPN NO 3-Wire 4mm Approach Sensor Inductive Proximity Switch : Industrial & Scientific
DC NPN 4-Wire NO NC Nomal Open/Close Proximity Sensors 4m Body M12: Amazon.com: 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: DIGITEN Hall Sensor Proximity Switch NPN 3-Wires Normally Closed NC with Magnet : Industrial & Scientific