A transducer's a device, usually electrical, electronic, electro-mechanical, electromagnetic, photonic, or photovoltaic that converts one type of energy or physical attribute to another for various purposes including measurement or information transfer (for example, pressure sensors). The term transducer's commonly used in two senses; the sensor, used to detect a parameter in one form and report it in another (usually an electrical or digital signal), and an actuator. An actuator may be descr… (More on Transducer)