What's RTD, thermocouple,laser sensor, thermocouple, Pneumatic valve workings Working principle

Question

Accepted Answer

RTD, thermocouple, laser sensor, and pneumatic valve are all types of sensors used in electrical and automation systems.

RTD (Resistance Temperature Detector) measures temperature by correlating the resistance of the RTD element with temperature.
Thermocouples work on the principle of Seebeck effect, where a voltage is generated when two dissimilar metals are joined at two different temperatures.
Laser sensors use laser light to detect objects or measure distances.
Pneumatic valves control the flow of air in pneumatic systems by opening, closing, or partially obstructing the air flow.