Biosensors are analytical devices that convert a biological response into an electrical signal. They typically consist of a biological element, such as enzymes or antibodies, that interacts with a specific substance, and a transducer that translates this interaction into measurable data. Biosensors are widely used in medical diagnostics, environmental monitoring, and food safety. These devices can detect various substances, including glucose in blood for diabetes management or pathogens in food samples. The integration of technology in biosensors allows for rapid and accurate results, making them essential tools in healthcare and research.