Classification and Principle of Carbon Dioxide Sensor

Classification of carbon dioxide sensors

In industrial, agricultural and other environmental wireless data collection, transmission, and monitoring, gas sensors are more sensor equipment used, and carbon dioxide sensors are the most commonly used in the market. The classification of carbon dioxide sensors is described below.

1. Thermal conductivity pool carbon dioxide sensor

The thermal conductivity cell carbon dioxide sensor is a device that uses the thermal conductivity of carbon dioxide gas. When the thermal conductivity of two or more gases is quite different, the thermal conductivity element can be used to distinguish the content of one of the components. Of course, this equipment can be used not only for measuring the concentration of carbon dioxide gas, but also for measuring hydrogen and certain rare gases. However, due to some specific reasons (such as technical blockade, etc.), this type of equipment is not often found in domestic coal mines. see.

2. Catalyst carbon dioxide sensor

The catalyst carbon dioxide sensor is a carbon dioxide sensor with a catalyst as the basic element. It uses the catalyst coating on the surface of a specific type of resistor. At a certain temperature, flammable gas is catalytically burned on its surface as the principle of carbon dioxide sensor. Therefore, people call this carbon dioxide sensor a thermal combustion sensor.

3. Semiconductor carbon dioxide sensor

The semiconductor carbon dioxide sensor is an early gas out instrument. It uses metal oxide semiconductor materials through some relatively primitive structures to produce resistance or current fluctuations at a certain temperature in a specific gas environment. Based on the principle of current fluctuation, this kind of equipment is very susceptible to temperature changes, so it has been eliminated by the industry.

4. Solid electrolyte carbon dioxide sensor

TGS4161 solid electrolyte CO2 sensor is a new miniaturization, low energy consumption solid electrolyte CO2 sensor, its detection range is from 350-10000PPM. It is an ideal home air quality control component. It has good sensitivity and selectivity to CO2, and is less affected by changes in temperature and humidity. Has good stability and reproducibility.

5. Electrochemical carbon dioxide sensor

The electrochemical carbon dioxide sensor can actually be regarded as a branch of the catalyst sensor. The carbon dioxide sensor uses some gas

The principle of electrochemical activity of the body allows these reactions of carbon dioxide gas and the sensing components of the sensor to distinguish the relevant parameters of carbon dioxide in the atmosphere. Of course, this type of sensor is currently more common.

6. Infrared carbon dioxide sensor

This type of carbon dioxide sensor module is an intelligent general-purpose, small-scale sensor that uses the principle of non-dispersive infrared (NDIR) to detect CO2 in the air. It has good selectivity, no oxygen dependence, and long life. Built-in temperature compensation; digital output and analog voltage output at the same time, easy to use. The carbon dioxide sensor is a high performance produced by closely combining mature infrared absorption gas detection technology with precise optical circuit design and sophisticated circuit design.

The sensor can be used to monitor the production process of smart homes, agricultural greenhouses and animal husbandry.

Principle of carbon dioxide sensor

 

The carbon dioxide sensor is a gas detection instrument, mainly used to measure the content of carbon dioxide in the air. When the content of carbon dioxide is too much or too little, the carbon dioxide sensor will sound an alarm, and people will take corresponding measures to adjust according to its prompts. The air quality meets people's own requirements. This device is mainly used in daily production and life, and plays an important role in creating a good atmosphere for people.

 

The carbon dioxide sensor mainly measures the carbon dioxide composition in the atmospheric environment, which has a very important impact on every field. With the continuous progress of modern society, the content of carbon dioxide is gradually increasing. Excessive carbon dioxide content will cause our body A serious impact, but also a threat to the environment on which we depend.

 

The greenhouse effect is the most awful example. The photosynthesis and respiration of plants have a great relationship with the concentration of carbon dioxide. Therefore, the birth of carbon dioxide sensors has taken us a big step forward.

 

Up to now, there are many methods for detecting carbon dioxide, probably these are: titration method, solid electrolyte method, capacitive method, wide front method, infrared absorption method and other methods.

 

The carbon dioxide sensor is used for detection in various environments, and will not have the slightest impact in the harsh environment. The material can effectively prevent corrosion. The system adopts hidden wire installation, which can be fixed on the wall or as needed. In some places, the carbon dioxide sensor has a beautiful appearance, the lead wire passes through the back of the housing, it is suitable for dark line installation, has good stability, long service life, AC and DC power supply, and is suitable for detecting carbon dioxide in various environments.

 

There are many differences in the principle and structure of selecting a sensor. How to select a sensor reasonably according to the specific measurement purpose, measurement object and measurement environment is the first problem to be solved when measuring a certain quantity. When the sensor is determined, the measuring method and measuring equipment that match it can be determined.

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