HOW TO IDENTIFY SENSOR PNP OR NPN? II PNP and NPN sensor (with Example) 

Thanks for your response

Sorry if its too late, but you can try searching the datasheet for your sensor by looking at the sensor name thats imprinted on it. thats the only way i could find. alternatively you could try to hook it up to a power supply and try one of the two options in the video, but you could break the sensor in the process

If possible send model number and make of sensor

@@KEESOLUTION It's a chinese sensor I bought on Aliexpress NJK-5001B

It is PNP NC sensor It is magnetic sensor means it can sense only magnet and range is maximum 10 mm adjustable Feature: Power supply reversal connection protection. Long service life, high reliability. Red LED indicates that it’s available to detect the sensor operating state. Simple operation with adjustable distance IP67 protection structure (IEC specification) Characteristic parameter: Type: PNP NC Mounting way: Screen shield type Detection distance: 10mm±10% Set distance: 0-8mm Response frequency: 1 kHz Delay distance: 10% below of the detection distance Standard detection object: Φ8 * 2mm Magnet(Standard cylindrical magnet,distinguishing the North and South pole) Supply voltage: DC 6-36V Consumption current: Below 300mA Loop protection: Reversal connection protection, surge absorption, load short-circuit protection Ambient temperature & humidity: -30~+65 °C, 35~95% RH Insulation impedance: Above 50 MΩ between charging part and housing Withstand voltage: AC 1000V 50/60Hz 1min between charging part and housing Protection structure: IP67 (IEC specification) Material: Nickel plated brass, ABS Wire length:1.2M

@@KEESOLUTION really? So I need magnets for all my sensors...hmm...

I will correct

Thankyou for your valuable feedback