The infrared carbon dioxide sensor is a sensor made using the principle of non-dispersive infrared (NDIR). It has various advantages such as good selectivity, long life, independence from oxygen, little environmental interference, not easy to be poisoned, and high precision. It is a type of sensor that is generally recognized by the market for carbon dioxide monitoring.

Working Principle

    Due to the different internal structures of various substances, their selective absorption of light of different wavelengths is also different. In other words, substances can only absorb light of a specific wavelength, and the absorption relationship of substances to light of a certain wavelength obeys the Lambert-Beer absorption law.

    Application scenarios

    With the widespread application of carbon dioxide gas in various industries, the control of carbon dioxide content has become increasingly strict. Carbon dioxide sensors play an important role in various fields such as smart home, smart agriculture, industrial gas emissions, and automotive air conditioning systems.

     1.Smart Home

    Carbon dioxide sensors can be integrated into smart home devices such as fresh air air conditioners, fresh air systems, and air boxes to improve indoor air quality and create a good living environment.

TX-Z19E Carbon Dioxide Gas Sensor

TX-Z19D Carbon Dioxide Gas Sensor

    2.Smart Agriculture

    In modern agricultural planting, real-time monitoring and automatic adjustment of carbon dioxide concentration have become essential technologies for smart planting and breeding. Carbon dioxide sensors used in high temperature and high humidity environments such as agricultural greenhouses need to have the ability to resist high humidity interference, and dual-channel sensor products are generally selected.

    3.Industrial gas emissions

    With the improvement of industrialization level, greenhouse gas emissions have also increased. Under the background of carbon neutrality, the world is paying more attention to the emission of greenhouse gases such as carbon dioxide. The detection of carbon dioxide gas in the industrial field also requires the help of infrared carbon dioxide sensors.

TX721-A1Infrared CO2 Gas Sensor

    4.Automobile air conditioning system

    As cars gradually become the "third space" in life, people are paying more and more attention to the concentration of carbon dioxide and organic gas in the car. Carbon dioxide has not only become an important indicator for measuring the air quality in the car, but also an important means to prevent fatigue driving. The application of carbon dioxide sensors in automobile air conditioning systems is becoming more and more common.

Notes

    Infrared carbon dioxide sensors are precision electronic components. The following points should be noted during use:

    1. Infrared sensors need to be preheated before use. Preheating is a process to stabilize the optical system components inside the infrared sensor, which can enable the sensor to achieve better test performance.

    2. To ensure that the sensor can work properly, the power supply voltage must be kept within the specified range. Exceeding the range may cause the sensor to malfunction, resulting in low sensor output concentration or malfunction.

    3. The sensor should be kept away from heat sources and avoid direct sunlight or other heat radiation. Do not use the sensor for a long time in an environment with high dust density.

    4. If the sensor needs to be placed in a small space, the space should be well ventilated, especially the two diffusion windows should be in a well ventilated position.

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