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Definition of Carbon dioxide NDIR sensor and applications
A Carbon dioxide sensor or CO2 sensor is an device for the measurement of carbon dioxide gas. The two different types of CO2 sensors are nondispersive infrared gas sensors (NDIR) and chemical gas sensors. Measuring carbon dioxide is significant in monitoring indoor air quality and in several work processes. In air conditioning and ventilation control applications you need a Carbon dioxide sensors to monitor the air quality. Where direct temperature measurement is not appropriate an NDIR sensors can be used. These NDIR sensors absorb ambient infrared radiation (IR) given off by a heated outside. CO2 NDIR sensors are intelligent enough to resolve how many persons are in a space and then regulate the air conditioning directly. Different in CO2 levels can be discovered by human respiratory changes through exercise with the high range.
Nondispersive Infrared (NDIR) CO2 Sensors
A CO2 Nondispersive infrared (or NDIR) sensor is an easy spectroscopic tool often used as gas detector. NDIR sensors are spectroscopic sensors to detect CO2 in a gaseous atmosphere by its typical absorption. The key parts are a light tube, an infrared source, an interference (wavelength) filter, and an infrared detector. The gas is gets into the light tube, and the electronics measures the absorption of the typical wavelength of light. We use mostly NDIR sensors for measuring carbon dioxide. The leading Sensors like the SAUTERS EGQ 222 have sensitivities of 20-50 PPM. CO2 NDIR sensors are also used for measuring CO2 for applications such as beverage carbonation, pharmeceutical fermentation and CO2 sequestration applications.