As a place in the basement with dense vehicles, the air quality of underground parking lot also directly affects people's health. Because the exhaust gas of the underground garage cannot be effectively discharged, it will have a significant impact on the air environment of the underground garage and the normal life of the users over time. In this regard, in some urban underground garages, carbon monoxide sensor monitoring equipment is used in the garage air environment monitoring system.

    The main purpose of installing a CO monitoring system in an underground garage is to prevent people from being poisoned by excessive CO concentration. The system is mainly composed of a gas controller and a gas detector. The purpose of the whole system is to achieve real-time monitoring, excessive alarm, and chain exhaust and other functions.

Importance of Carbon Monoxide Sensor Monitoring

    The main source of carbon monoxide in underground parking lots is that when the car engine is idling, the gasoline cannot be fully burned, resulting in the production of exhaust containing a large amount of CO gas. The underground environment of the parking lot is closed, the air circulation is poor, and the vehicles are frequently circulating. Each car produces a certain amount of CO gas during the start and stop process, which accumulates into a large amount and cannot be discharged naturally. CO is a colorless and odorless toxic gas that is difficult to detect. Once inhaled in excess, it will cause poisoning and even threaten life. 

    Carbon monoxide sensors are used in underground parking lots to check the carbon monoxide concentration to determine whether it is in a comfortable environment and provide feedback to ensure the safety of personnel. Different carbon monoxide concentrations will cause different hazards.

    In some domestic underground garage air environment monitoring systems, by installing carbon monoxide sensors, the carbon monoxide concentration values in different areas of the garage can be detected in real time at multiple points, and the monitored carbon monoxide concentration values can be uploaded to the central platform for display through the network.

    Therefore, a high-precision carbon monoxide sensor becomes the core of the support system and the heart of the carbon monoxide alarm in the system. The alarm is detected and alarmed by the electrical signal fed back by the sensor. For carbon monoxide detection in underground parking lots, the following electrochemical carbon monoxide sensor is recommended for detecting CO in garages.

Electrochemical Carbon Monoxide Sensor

MQ-E2-CO-φ20

    MQ-E2-CO-φ20 carbon monoxide sensor is a fuel cell type sensor. Carbon monoxide and oxygen undergo corresponding redox reactions on the working electrode and the counter electrode and release charges to form current. The generated current is proportional to the carbon monoxide concentration and follows Faraday's law. The concentration of carbon monoxide can be determined by measuring the current.

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