Enzyme-based sensors are devices that use specific enzymes to detect and measure the presence of certain substances, such as glucose or toxins. These sensors work by converting a chemical reaction involving the target substance into an electrical signal, which can then be quantified. This makes them valuable tools in various fields, including medical diagnostics and environmental monitoring. These sensors are often used in glucose meters for diabetes management, where they help patients monitor their blood sugar levels. Additionally, enzyme-based sensors can be applied in food safety to detect contaminants, ensuring that products are safe for consumption.