Definition: A dosimeter is a device used to measure the concentration of a particular substance or chemical in a sample. It consists of a sensitive sensor that converts an electrical signal (such as an electric current) into a measurable physical quantity, such as voltage or resistance. The measurement is usually made at a predetermined reference point, typically a known concentration of the substance. Dosimeters are commonly used for monitoring the concentration of chemicals in biological samples, environmental samples, and industrial processes to ensure compliance with safety standards. They