An electrochemical CO sensor includes two electrodes (the working electrode, and the counter electrodes) surrounded by a liquid electrolyte conductor. The main working electrode is typically constructed of platinum which provides a catalyst for the CO gas. This working electrode is supported by a gas-permeable, yet waterproof membrane which enables CO to enter and electrochemically oxidize with the platinum working electrode. Once this oxidation takes place, the electrons from this electrochemical reaction flow through the external circuit of the device, and electrons are transported by electrolyte, allowing the onboard sensor to signal the presence of CO.
The electrochemical CO sensor – due to their more economical points – is now one of the hottest choices for facility and health protection
* Long service life