Principle and application of carbon dioxide CO2 sensor

Principle and application of carbon dioxide CO2 sensor

Carbon dioxide is one of the raw materials for photosynthesis of green plants. 95% of crop dry weight comes from photosynthesis. Therefore, the use of carbon dioxide detectors to control the concentration has become an important factor affecting crop yield.

Plastic greenhouse cultivation keeps crops in a relatively closed place for a long time, and the CO2 concentration in the greenhouse changes greatly within a day. Hours later, until atmospheric levels return to around 4pm. The concentration of carbon dioxide in vegetables is 1000-1500ppm. Therefore, the lack of carbon dioxide in plastic greenhouses is very serious and is an important factor affecting vegetable production.

The installation of carbon dioxide detectors in the plastic shed ensures timely alarms for the use of air fertilizers when carbon dioxide levels are insufficient. Ensure that vegetables, edible fungi, flowers, traditional Chinese medicines, etc. are listed early, with high quality and high yield.

Applications of CO2 Sensor Difference

Infrared carbon dioxide sensor: The sensor uses the principle of non-dispersive infrared (NDIR) to detect the presence of CO2 in the air, which has good selectivity and no oxygen dependence, and is widely used in various occasions of flammable and explosive gases.

Catalytic carbon dioxide sensor: used in the fields of petroleum, chemical industry, metallurgy, refining, gas transportation, biochemical medicine and water treatment.

Thermal carbon dioxide sensor: According to the principle of analyzing the difference between the total thermal conductivity of the mixed gas and the gas content, the two arms of the bridge are equipped with a detection element and a compensation element. background), the bridge output voltage becomes larger. The voltage variable increases with increasing gas concentration. Compensation components serve as reference and temperature compensation components. The main application is to detect the concentration of combustible gases and gasoline, alcohols, ketones and benzene.

NiUBoL carbon dioxide detector, through on-line monitoring of atmospheric carbon dioxide gas and sound and light alarm, not only controls the gas concentration for special occasions, but also has early warning of on-site gas concentration to protect life and property safety in time.

NiUBoL carbon dioxide detector instruments are widely used in petroleum, chemical, metallurgy, fire protection, coal mine, electric power, shipbuilding, environmental protection, telecommunications, medical and other industries.

NiuBoL CO2 sensor adopts imported infrared sensor combined with high-speed and high-precision processing circuit, with stable signal, high precision and good repeatability. The instrument outputs various standard signals and is compatible with various alarm systems, plc, dcs and other control systems.