The Calomel Electrode is a type of reference electrode used in electrochemistry. It consists of mercury and mercury(I) chloride (calomel) in a saturated potassium chloride solution. This setup provides a stable and well-defined electrode potential, making it useful for measuring the voltage of other electrodes in various chemical reactions. Calomel electrodes are commonly used in pH meters and other electrochemical applications. They are known for their reliability and ease of use, although they contain mercury, which poses environmental and health risks. Proper handling and disposal are essential to minimize these hazards.