Auto Bed Level Inductive Sensor for 3D Printers

If you're thinking about adding the auto-bed levelling feature to your 3D Printer, you're going to need a probe which can accurately measure the distance to the print bed at various test points.
One such probe is the inductive proximity sensor.
A look at the electrical characteristics of NPN/PNP inductive sensors from Banggood.
PNP Inductive Proximity Sensor:
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Dupont connector kit:
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