Electromagnetic sensors are devices that detect and measure electromagnetic fields or waves. They work by converting electromagnetic energy into electrical signals, which can then be analyzed or used to trigger other actions. These sensors are commonly used in various applications, including communication systems, medical imaging, and industrial automation. There are different types of electromagnetic sensors, such as infrared sensors, radio frequency sensors, and magnetic field sensors. Each type is designed to respond to specific frequencies or types of electromagnetic radiation. Their versatility makes them essential in modern technology, enabling advancements in areas like smart devices and automated systems.