Carbon dioxide concentration sensor

NBL-W-CO2 carbon dioxide sensor adopts imported sensor chip, which is used to detect the concentration of CO2 in various environments, and has the characteristics of high precision and good stability. 

The signal transmitter adopts advanced integrated circuit modules, which can output voltage, current and other signals according to the different needs of users. The instrument is small in size, easy to install, and reliable in performance; it adopts proprietary line, which has good linearity, strong load capacity, long transmission distance and strong anti-interference ability. This product can be widely used in the detection of carbon dioxide concentration in office buildings, public places, greenhouses, production plants and other places.

Carbon dioxide concentration sensor(CO2 Sensor) Technical parameter：

Calculation formula：

Current type (4～20mA output):

C=(I-4)/16 × 5000

(C is the measured carbon dioxide concentration value (ppm), I is the output current (mA))

What is carbon dioxide (CO2)?

Carbon dioxide (CO2) is a chemical compound consisting of one carbon atom and two oxygen atoms. It is a common colorless gas that is found widely in nature, including in the atmosphere, seawater, and the Earth's crust.

In the biosphere, carbon dioxide plays a very important role. Plants absorb carbon dioxide through photosynthesis and convert it into organic matter, thus providing energy and nutrition for other organisms. Carbon dioxide also plays a vital role in the Earth's carbon cycle.

However, carbon dioxide emissions from industrial and human activities have also become an environmental issue of concern. Activities such as industrial production, burning of fossil fuels, and deforestation all lead to large amounts of CO2 emissions, which have implications for global climate change and environmental health.

Therefore, monitoring and controlling carbon dioxide concentration has become one of the important tasks in environmental protection and climate change response. Carbon dioxide sensors are used to monitor and control the concentration of carbon dioxide in the air so that timely measures can be taken to safeguard indoor air quality and environmental health.

Carbon dioxide concentration sensor working principle

Carbon dioxide concentration sensors(CO2 Sensor) usually use the infrared absorption principle for measurement. The following are the basic steps of the working principle of carbon dioxide concentration sensor:

1. Emission of infrared light: The sensor contains an infrared light source which emits infrared light of a specific wavelength.

2. Infrared absorption: The sensor receiver receives infrared light from the environment being measured, and when the infrared light passes through the environment being measured, the carbon dioxide absorbs the infrared light of a specific wavelength.

3. Measurement of the degree of absorption: The sensor measures the degree of absorption of the infrared light received by the receiver. The degree of absorption of carbon dioxide molecules is proportional to the concentration of carbon dioxide in the environment.

4. Conversion to electrical signal: The sensor converts the measured degree of infrared absorption into a corresponding electrical signal.

5. Output concentration value: Based on the strength of the electrical signal, the sensor can calculate the carbon dioxide concentration in the environment and output the concentration value.

By measuring the degree of infrared absorption in the measured environment, the CO2 concentration sensor is able to indirectly measure the CO2 concentration in the environment. This technology is characterized by high accuracy, fast response and long-term stability, and is widely used in indoor air quality monitoring, greenhouse climate control, industrial emissions monitoring and other fields.

Carbon dioxide concentration sensors are widely used in the following scenarios:

1. Indoor air quality monitoring: carbon dioxide concentration sensors can be used for air quality monitoring in indoor environments such as offices, schools, hospitals, shopping malls and so on. By monitoring the indoor carbon dioxide concentration, the freshness of indoor air and ventilation status can be assessed, and people can be reminded to open windows at the right time to ventilate or take other measures to improve indoor air quality.

2. Greenhouse climate control: In greenhouses, carbon dioxide concentration sensors can monitor the carbon dioxide level in the greenhouse. According to the plants' demand for carbon dioxide and the characteristics of photosynthesis, the supply of carbon dioxide can be adjusted to maintain a suitable carbon dioxide concentration, which promotes plant growth and improves yields.

3. Industrial emission monitoring: Carbon dioxide concentration sensors are used in industrial production processes to monitor and control carbon dioxide emissions. By monitoring the carbon dioxide concentration in industrial exhaust gases in real time, the compliance of emissions can be assessed and corresponding emission reduction measures can be taken to protect the environment and reduce carbon emissions.

4. Outdoor air quality monitoring: Carbon dioxide concentration sensors can also be used in outdoor air quality monitoring stations, with other sensors such as PM2.5, ozone, etc., to comprehensively assess the ambient air quality, and to provide data support for urban planning, transportation management, environmental protection, and so on.

How to choose to buy carbon dioxide concentration sensor

When choosing a carbon dioxide concentration sensor, you can consider the following factors:

1. Carbon dioxide concentration sensor (CO2 sensor) application scene: first of all, you need to consider the application scene of the sensor. Different application scenarios have different requirements for the sensor's accuracy, response time, and operating temperature range. For example, indoor air quality monitoring requires high accuracy and faster response time, while industrial emission monitoring requires a wide range of operating temperature range and explosion-proof design, etc.

2. Carbon dioxide concentration sensor(CO2 Sensor) precision and accuracy: The second thing to consider is the precision and accuracy of the sensor. Customers need to select sensors with suitable precision and accuracy according to actual needs. Usually, the higher the accuracy, the higher the price of the sensor will be.

3. Response time: Response time refers to the time it takes for the sensor to detect a change in carbon dioxide and output the detection result. The shorter the response time, the better, especially in application scenarios that require timely action.

4. Carbon dioxide concentration sensor(CO2 Sensor) interface type and protocol support**: the sensor's interface type and protocol support are also factors to consider. Different interface types and protocol support have different requirements for data processing and integration into the system. Common interface types include analog output, digital output, RS485, CAN, etc.; Common protocols include Modbus, BACnet, OPC UA, etc.

5. Carbon Dioxide Concentration Sensor (CO2 Sensor) Cost and Maintenance: Finally, there is a need to consider cost and maintenance. The price of the sensor and maintenance costs for customers is also an important consideration. Usually, factors such as brand, model, and accuracy will affect the price of the sensor, while the maintenance cost includes the replacement of the sensor, overhaul and maintenance.

Carbon dioxide concentration sensors (CO2 sensors) are used in a wide range of applications to help us understand and monitor the level of carbon dioxide in the environment, providing important data support for indoor air quality improvement, greenhouse management, industrial emission control and environmental protection.

In conclusion, when choosing a carbon dioxide concentration sensor (CO2 sensor), you need to make comprehensive consideration based on specific application scenarios, precision and accuracy, response time, interface type and protocol support, cost and maintenance, etc., in order to choose a sensor that suits your needs.