Which of the following statements best describe the definition of a sensor (what is a sensor)?

Select one alternative:

component/device that converts some physical phenomenon into mechanical energy

(change of physical quantity to change of electrical quantity)

component/device that converts any form of energy into any other form of energy

(mechanical or electrical)

component/device that converts some physical phenomenon into electrical signal

(change of physical quantity to change of electrical quantity)

component/device that converts electrical signal into mechanical energy.