Datasensor -Italy make photocell sensor

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Thank you,

I got the swith inside the sensor to change from PNP to NPN.

But what is PNP and NPN.

That is the type of transistor output connection. These photocells work on DC - mostly in a range from 12 to 24 volts. PNP means the output is delivered from a PNP transistor. NPN is a NPN transistor. These photocells have a cascade output circuit so that you can use or a -12 volts (minus- negative) or a + 12 volts (plus- positive) output to energize your switching device. (relais- coil, lamp or whatever)

Thank you,

need some more

If you have 3 wires or connections: one is for +12 volts, one for -12 volts (ground level) and the third gives the output in + 12 volts or - 12 volts depending on PNP or NPN choice. It should be on the instruction paper.

check transistors: junctions

Here's the tech-data file for this sensor.

Thank you,