What are NPN and PNP Sensors? - A GalcoTV Tech Tip | Galco

This tech tip today shows how PNP and NPN wiring configurations are different. The examples illustrated in the video are two different sensor diagrams.
"Difference Between NPN and PNP in Sensors", presented by Galco TV.
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[@GalcoIndustrial]

Most industrial proximity sensors (inductive, capacitive, ultrasonic and photo electric) are solid state.
The term solid state refers to the type of components used within the sensor. Solid state electronic components such as transistors are used to switch the output of the sensor upon detection of an object.
Two specific types of 3 wire sensors are available; PNP and NPN. The difference is a result of the internal circuit design and type of transistors used.
A key point to observe is that PNP and NPN has nothing to do with whether the sensor is normally open (N/O) or normally closed (N/C), i.e. a PNP sensor may be either N/O or N/C as can an NPN be either N/O or N/C.

[@youmah25]

you're a life saver

[@MultiLuc28]

Thank you! This made it clear so quickly!

[@GalcoIndustrial]

Your welcome

[@pinkcat290]

Saved my life

[@mdrafiahmad8862]

First you are so good looking and second you told it really very well.

[@GalcoIndustrial]

Thank you Rafi

[@stalinsubbiah3238]

crown cork is stainless steel type of material then how it is attracted by inductive proximity and refro reflective photo sensor?

[@davidhaines4173]

I love Katie !!!

[@GalcoIndustrial]

We love Katie too

[@conspiringconspiracists5013]

What is the load ? Can i be any load.

[@GalcoIndustrial]

The load would be your input. Either a PLC card with sensor input, some type of speed measuring device or motion detector perhaps, could even be a simple on-off detecting the presence of a machine part like when a cylinder extends or retracts.

[@aqx1729]

How to bypass sensor