An electrochemical sensor is a device that uses electrochemical reactions to detect and measure the concentration of a target analyte. It is widely used in various fields, including medical diagnostics, environmental monitoring, food safety, and industrial process control. The electrochemical sensor is highly sensitive, accurate, and selective. In this article, we will discuss the working principle, types, and applications of electrochemical sensors. Electrochemical sensors work on the principle of electrochemistry, which involves the study of chemical reactions that involve the transfer of electrons. The sensor consists of two electrodes: a working electrode and a reference electrode. The working electrode is coated with a material that reacts with the target analyte. When the analyte comes into contact with the working electrode, it undergoes a chemical reaction that generates an electrical signal. The reference electrode provides a stable voltage reference against which the working electrode potential can be measured.
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