👉 A biosensor is a sensor that measures the concentration of a chemical or biological substance in an environment. It is a type of sensor that can be used to detect changes in a chemical or biological substance, such as temperature, humidity, or oxygen levels, and convert them into a measurable signal. Biosensors work by utilizing the properties of the material being tested to measure its concentration. This includes the ability of materials to absorb or emit light, heat, or other signals that are related to the chemical