A carbon dioxide sensor is a sensor used to measure the concentration of carbon dioxide in the air. Carbon dioxide concentration is an important indicator for measuring indoor air quality; excessively high carbon dioxide concentrations can affect human health and work efficiency.

The measurement range of a carbon dioxide sensor refers to the range of carbon dioxide concentrations that the sensor can detect. Generally speaking, the measurement range of a carbon dioxide sensor is 400ppm to 5000ppm. 400ppm is the natural content of carbon dioxide in the air, and 5000ppm is the typical maximum concentration of carbon dioxide in general indoor air.

The measurement range of a carbon dioxide sensor is related to the type of sensor. Currently, common carbon dioxide sensors mainly include the following types:

Non-Dispersive Infrared (NDIR) sensors: NDIR sensors are currently the most widely used carbon dioxide sensors. NDIR sensors measure carbon dioxide concentration by measuring the absorption of infrared light by carbon dioxide in the air. The measurement range of NDIR sensors is generally 400ppm to 10000ppm.

Photoelectrochemical sensors: Photoelectrochemical sensors are another common type of carbon dioxide sensor. Photoelectrochemical sensors measure carbon dioxide concentration by measuring the current generated when carbon dioxide in the air undergoes a chemical reaction with a catalyst. The measurement range of photoelectrochemical sensors is generally 0ppm to 5000ppm.

Electrochemical sensors: Electrochemical sensors are an early type of carbon dioxide sensor. Electrochemical sensors measure carbon dioxide concentration by measuring the current generated when carbon dioxide in the air undergoes a chemical reaction with electrodes. The measurement range of electrochemical sensors is generally 0ppm to 5000ppm.

When selecting a carbon dioxide sensor, the measurement range of the sensor should be determined based on the actual application scenario. For example, for a carbon dioxide sensor used for office air quality monitoring, its measurement range should be 400ppm to 5000ppm. For a carbon dioxide sensor used in places such as factory workshops, its measurement range can be appropriately expanded, such as to 400ppm to 10000ppm.

In addition, when choosing a carbon dioxide sensor, other parameters of the sensor should also be considered, such as accuracy, response time, stability, etc.

The following are specific applications of the measurement range for carbon dioxide sensors:

400ppm~5000ppm: Used for air quality monitoring in places such as offices, schools, and hospitals.

400ppm~10000ppm: Used for air quality monitoring in places such as factory workshops and breeding farms.

0ppm~5000ppm: Used for carbon dioxide concentration measurement in fields such as agriculture, food, and chemical industry.

In summary, the measurement range of a carbon dioxide sensor is an important parameter for sensor selection. When choosing a carbon dioxide sensor, the sensor's measurement range should be determined based on the actual application scenario.