How To Choose Carbon Dioxide Sensor
A lot of people buy carbon dioxide sensors, why different prices for the same product? At present, the carbon dioxide sensors used in the market are mainly solid-state electrolyte and infrared principle. The principle of CO2 infrared sensor is that according to the absorption of infrared radiation in a certain frequency band by CO2, the radiation energy passing through the measuring chamber is weakened, and its attenuation degree depends on the content of CO2 in CO2 gas.
As an instrument for measuring carbon dioxide concentration, CO2 sensors have been widely used in living environment, plant cultivation, cultural relics and document protection. So how do you choose the right carbon dioxide sensor?
There are many kinds of carbon dioxide sensors, different shapes, now, let's talk about the choice of carbon dioxide sensor should pay attention to the problem.
1.The Principle
At present, the carbon dioxide sensors used in the market are mainly solid-state electrolyte and infrared principle. The basic principle of solid electrolyte sensor is: through the gas generated ions, the formation of electromotive force, electromotive force measurement, measurement of gas concentration, with high conductivity, sensitivity and selectivity, a wide range of uses. The principle of CO2 infrared sensor is that according to the absorption of infrared radiation in a certain frequency band by CO2, the radiation energy passing through the measuring chamber is weakened, and its attenuation degree depends on the content of CO2 in CO2 gas.
2. Signal Output
The existing sensor signal output methods include serial port, analog, GPRS, Ethereum, WiFi, etc. The installation mode varies with the signal output mode. The signal output should not be simply divided into advantages and disadvantages, but also depends on the environmental requirements of the design product scheme.
3. Measurement Accuracy
Accuracy is an important performance index of sensor, and also an important link in precision measurement of the whole measurement system. With the improvement of sensor precision, its price also increases, therefore, as long as can meet the precision requirements of the whole measurement system, you can not choose too high sensor. This makes it possible to choose a relatively cheap and simple carbon dioxide sensor among many that can meet the same measurement requirements.
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