Sensor

Definition

It is a device that covert any physical quantity to electrical signal.

Why

It convert physical quantity to electrical signal to enter in controller to make a certain project by actuator.

Transducer

It contains a sensor and transmitter which transmitter produce a regular signal so it is better than sensor and also enter signal in controller to make a project by actuator.

Forms physical quantity

Temperature, pressure, fluid, motion, heat, …………ets.