How many types of biosensors are there?

There are several types of biosensors, broadly categorized into enzyme-based, DNA-based, electrochemical, mass-based, and optical biosensors. Each type is tailored for specific applications and detection mechanisms. For example, enzyme-based biosensors utilize enzymes for specific reactions, while optical biosensors rely on light interactions to detect analyte presence. The diversity in biosensor types allows for targeted applications across various scientific and industrial fields.