Electrochemical Gas Sensors

Electrochemical Gas Sensors

Electrochemical gas sensors are devices that detect the presence of various gases in the environment by measuring the electrical current produced by a chemical reaction between the gas and a sensing electrode. These sensors are widely used in industrial, commercial, and residential settings to monitor the levels of toxic, flammable, or otherwise harmful gases in the air. The basic design of an electrochemical gas sensor consists of three main components: a sensing electrode, a reference electrode, and an electrolyte. The sensing electrode is typically made of a material that reacts with the target gas, such as platinum or gold, while the reference electrode is made of an inert material, such as silver or zinc. The electrolyte is a solution that facilitates the transfer of ions between the two electrodes. When a gas molecule comes into contact with the sensing electrode, it undergoes a chemical reaction that produces a flow of electrons. This flow of electrons generates an electrical current that is proportional to the concentration of the gas in the air. The reference electrode serves as a baseline for this measurement, ensuring that the sensor is accurate and reliable. Electrochemical gas sensors are highly sensitive and selective, meaning that they can detect very low concentrations of specific gases while ignoring other gases in the environment. They are also relatively inexpensive and easy to use, making them a popular choice for a wide range of applications.

sensing electrode, reference electrode, electrolyte, chemical reaction, electrical current

— Brian Robinson

CITATION : "Brian Robinson. 'Electrochemical Gas Sensors.' Design+Encyclopedia. https://design-encyclopedia.com/?E=331083 (Accessed on June 15, 2025)"