I googled but yield little results. Hopefully I can have a link to its complete operation principle and advantages of it. Any help?

Sorry for not being clear. ANY Sensor will do. But if possible use either :
Photoelectric sensor
Inductive Proximity Sensor
Fiber Optic Sensor
Magnetic Sensor
Microswitch snap action Sensor
Pressure Sensor
Photoelectric High Accuracy Sensor
Capacitive Proximity Sensor
Temeperature Sensor
Ultrasonic Sensor

 

Hello,

What kind of sensors are you looking for?

http://www.educypedia.be/electronics/sensors.htm

Sensors: Capacitive sensors Inductive sensors Piezo Displacement sensors Infra red sensors Pressure sensors Temperature sensor types Encoders and resolvers Magnetoresistive sensors Reed switches Thermocouple General overview Miscellaneous Temperature: PT100-RTD Tilt Sensors Hall sensor Optical sensors Temperature sensors Ultrasonic sensors

Greetings,
Bertus

 

Hmm... Are we doing someones homework for them???

 

Finally a question I can answer. Look into the lumber mill industry they use alot of different sensors for processing lumber. Most of the operations were done by hand or eye not to long ago and they could not keep up with the demand.