In maximum clean room applications, there are several devices are used to monitor the air quality. These devices work exceptionally and help the people to work perfectly in order to get the right result. Needless to mention, it is quite crucial to maintain the air quality when you are talking about clean room. CO2 sensor analyzes the percentage in the environment and makes a great compliment in order to get all these things rightly. This is the main reason, people who are involved with the clean room operation, they always emphasize on these sensors.
Working principle of Carbon Dioxide sensorCarbon
dioxide sensor mainly works to measure the percentage of
the carbon dioxide in the close room environment. If the percentage is greater
than the prescribed level, then it is important to foot the effort to decrease
that. In this way, it will be easier to come with right kind of result.
These
sensors mainly measure the gaseous carbon dioxide level just by detecting the
quality of IR radiation absorbed by the carbon dioxide molecules. This sensor
mainly employs hot metal as filament and it acts as an IR source to properly
generate the IR radiation.
The IR source is located at one
end of a sensor tube, and another end is provided with an IR sensor. The IR
sensor measures the amount of radiation that passes through the sample without
being absorbed by the carbon dioxide molecules.
The sensor measures the IR
radiation absorbed in the narrow band at 4260 nm. The greater the absorbing gas
concentration in the sampling tube, the lesser the amount of radiation from the
source.
As a result of this increase in
temperature, a voltage is generated, amplified and read by an interface system.
Meanwhile, the carbon dioxide gas diffuses via the sensor tube by the eight
vent holes.
How does NDIR CO2 Sensor
When time comes to think about NDIR CO2
Sensor, they work extensively in order to deliver the result that will
make you more perfect and makes you clear about the right kind of sensing
result.
DIR is an industry term for "no
dispersive infrared", and is the most common type of sensor used to
measure carbon dioxide, or CO2. An infrared (IR) lamp directs waves of light
through a tube filled with a sample of air toward an optical filter in front of
an IR light detector. The IR light detector measures the amount of IR light
that passes through the optical filter.
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