As an instrument for detecting carbon dioxide concentration, carbon dioxide sensors are widely used in living environment, plant cultivation, cultural relics, and archives protection. So how to choose the right carbon dioxide sensor?
When you search for carbon dioxide sensors on the Internet, you will find that there are various types of carbon dioxide sensors, different shapes, and varying prices. Many people who buy carbon dioxide sensors are puzzled about it. Why are the prices of the same products different? What’s the difference? So today, let’s talk to you about what should be paid attention to when choosing a carbon dioxide sensor?
carbon dioxide sensor price
As the saying goes, you get what you pay for. But if you also have the idea of ”you should buy expensive things when you choose a carbon dioxide sensor, so that the quality can be guaranteed”, you may suffer.
The price factor is of course an important reference item when choosing a sensor, but it depends on the application. You can choose within the scope of your own product needs, and you don’t have to pursue the so-called “expensive”.
carbon dioxide sensor range
The range of the sensor is also an important indicator when choosing, but if you pursue a large range too much, it is completely unnecessary. Range selection and price issues have the same purpose, that is, they are suitable for their own products.
In the natural environment, the normal level of carbon dioxide in the air is 0.04% (400 ppm), sometimes reaching 500 ppm in large cities. In the absence of people indoors, the carbon dioxide concentration is generally around 500 to 700 ppm.
Generally speaking, when the indoor carbon dioxide content is above 5000ppm, the function of the human body will be seriously confused, causing people to lose consciousness and confusion. To detect carbon dioxide concentration in the home environment, the sensor range of 0-5000ppm is enough. In public places, classrooms and other crowded environments, the sensor range of 0-50000ppm is also ok~
When selecting, as long as the sensor range covers the carbon dioxide concentration under the extreme conditions of the use environment, it is not necessary to pursue excessive range.
carbon dioxide sensor principle
There are two main types of carbon dioxide sensors commonly used in the market, one is based on solid electrolyte and the other is based on infrared principle. Among them, the principle of solid-state electrolyte sensor means that the gas-sensitive material generates ions when passing through the gas, thereby forming an electromotive force, and measuring the electromotive force to measure the gas concentration. This sensor is widely used due to its high conductivity and good selection characteristics. The principle of the infrared carbon dioxide sensor is to weaken the radiation energy passing through the measurement chamber according to the absorption of CO2 on infrared radiation in a specific band, and the degree of weakening depends on the CO2 content in the measured CO2 gas.
carbon dioxide sensor signal output
At present, the sensor signal output methods include serial port, analog, GPRS, Ethernet, WiFi and other signal output methods. Different signal output methods have different installation methods. The signal output should not be simply divided into pros and cons, but depends on the environmental requirements of the product design.
carbon dioxide sensor measurement accuracy
Accuracy has always been an important performance index of the sensor, and it is an important link related to the measurement accuracy of the entire measurement system. The higher the accuracy of the sensor, the more expensive it is. Therefore, the accuracy of the sensor only needs to meet the accuracy requirements of the entire measurement system, and it is not necessary to select it too high. This makes it possible to choose a cheaper and simpler carbon dioxide sensor among many sensors for the same measurement purpose.
carbon dioxide sensor preheating time
Different types of sensors that detect different gases require different warm-up times, some need a few minutes, and some only a few seconds. The light source and detector in the infrared carbon dioxide sensor need to be energized to reach the state in order to read the accurate value. Preheating is for the stability and accuracy of the sensor, and has nothing to do with poor product performance.
