A mechanical, electrical, or chemical device that automatically identifies and records or registers a stimulus, such as an environmental change in pressure or temperature, an electrical signal, or radiation from a radioactive material.
detects the presence of radio signals or radioactivity
extracts modulation from a radio carrier wave
anything that receives a stimulus (as heat pressure light motion etc.) and responds to it
any device that receives a signal or stimulus (as heat or pressure or light or motion etc.) and responds to it in a distinctive manner
electronic equipment that detects the presence of radio signals or radioactivity
rectifier that extracts modulation from a radio carrier wave
