Technical Guides

Step-by-step wiring for 2-wire and 3-wire proximity sensors, PNP and NPN outputs, and connecting them to a PLC, with troubleshooting tips.

Inductive sensors detect metal; capacitive sensors detect almost anything, including plastic, liquids and powders. How each works, typical ranges, and how to choose.

PNP sensors switch the positive supply to the load; NPN sensors switch the load to 0V. Here is how to tell them apart, how to wire each, and which one your PLC needs.