Carbon monoxide sensors belong to the category of chemical sensors. A chemical sensor mainly consists of two components: a recognition system and a transduction system.
The recognition system links a specific chemical parameter (usually concentration) of the analyte to the transduction system. It primarily fulfills two functions: selectively interacting with the analyte, and converting the measured chemical parameter into a signal that the transduction system can respond to.
The molecular recognition system is the decisive factor determining the performance of the entire chemical sensor. Therefore, the core research focus of chemical sensors lies in the selection of the molecular recognition system and the effective integration of this system with a suitable transduction system.
The transduction system of a chemical sensor receives the response signal from the recognition system and transmits it to the electronic system via electrodes, optical fibers, or mass-sensitive elements. The signal is converted into changes in voltage, current, or light intensity, which are then amplified or converted for output. Ultimately, the response signal from the recognition system is transformed into an analyzable signal, enabling the quantification of the target analyte in the sample.
The electrochemical carbon monoxide gas sensor adopts a hermetically sealed structural design, comprising electrodes, a filter, a gas-permeable membrane, an electrolyte, electrode leads (pins), and a housing.
