1. Principle of Carbon Monoxide Sensor

    Electrochemical carbon monoxide sensors are gas detection elements based on electrochemical principles. When carbon monoxide gas molecules pass through the gas permeable membrane into the sensor and come into contact with the surface of the sensing electrode, an electrochemical reaction occurs. Carbon monoxide is oxidized on the working electrode to produce carbon dioxide, electrons, and protons (hydrogen ions). At the same time, these electrons flow to the counter electrode through an external circuit, forming a current. The magnitude of this current is proportional to the concentration of carbon monoxide, so the gas concentration can be determined by measuring the current intensity.

    There is a good linear relationship between the current output by the sensor and the carbon monoxide concentration, which makes signal processing and concentration reading simple and accurate.

(Electrochemical carbon monoxide schematic)

2. Applications of Carbon Monoxide Sensors

    Electrochemical carbon monoxide sensors are widely used in many fields, including civil fire protection, industrial safety, energy storage safety, etc., due to their fast response speed, high sensitivity, and low cost. 

    In the direction of civil applications, electrochemical carbon monoxide sensors are widely used in fire protection systems in homes, commercial buildings, and public places. By monitoring the concentration of CO generated by the fire, fire hazards can be discovered early, and precious time can be gained for people's escape and firefighters' rescue, thereby effectively protecting people's lives and property.

    In industrial applications, carbon monoxide is a common toxic and harmful gas that is released into the air due to incomplete combustion. Therefore, electrochemical carbon monoxide sensors are widely used to monitor CO concentrations in factories and workshops to ensure the safety of workers. This sensor can monitor the concentration of carbon monoxide in real time and accurately. Once the concentration exceeds the safety standard, it will immediately sound an alarm to remind workers to take necessary protective measures, thereby effectively avoiding carbon monoxide poisoning accidents.

    In the field of energy storage safety, energy storage electrochemical carbon monoxide sensors play a vital role. When the battery packs of energy storage power stations are highly concentrated, they are easily affected by internal and external factors such as overcharge, overdischarge, overheating, and mechanical collision, which can lead to battery diaphragm collapse and internal short circuits, thereby causing thermal runaway and fire. Carbon monoxide is one of the toxic gases that energy storage batteries will release before a safety accident occurs. Therefore, the application of electrochemical carbon monoxide sensors can achieve early warning monitoring, detect abnormal conditions in time and take measures, thereby effectively avoiding the occurrence of fire accidents, which is very suitable for the field of energy storage fire protection.

    With the continuous advancement of technology and the enhancement of environmental awareness, the application scenarios of electrochemical carbon monoxide sensors are also expanding.

    In the field of smart homes, this sensor can be integrated into gas water heaters with carbon monoxide protection and gas leak protection functions, and detect the carbon monoxide and methane content in the space in real time 24 hours a day. Once the gas concentration exceeds the warning value, an alarm will be immediately sounded to prevent carbon monoxide poisoning accidents through active leakage prevention.

    In the field of smart cities, electrochemical carbon monoxide sensors can also be used to monitor the carbon monoxide concentration in the urban environment, providing data support for urban planning and environmental protection.

    In addition, in the fields of environmental monitoring and automobile exhaust monitoring, electrochemical carbon monoxide sensors also have broad application prospects.

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