A device that converts one type of signal into another is called.
A device that converts one type of signal into another is called Transducer.
A transducer is a device that converts energy from one form to another. Usually a transducer converts a signal in one form of energy to a signal in another. ... The process of converting one form of energy to another is known as transduction.
Active transducers are those which do not require any power source for their operation. They work on the energy conversion principle. They produce an electrical signal proportional to the input (physical quantity). For example, a thermocouple is an active transducer.
Sensors are almost always transducers but transducers are not necessarily sensors. A transducer is a device which converts signals from one form to another. This can include loudspeakers and linear positioners are well as physical quantity to electrical signal devices.