How A Photoacoustic CO2 Sensor Works - Gravity: I2C SCD41 Infrared CO2 Sensor (400 - 5000 ppm)

Special coupon (15% Off) for purchasing CO2 concentration alert keychain materials.
https://www.dfrobot.com/coupon-201.ht...

Currently, most carbon dioxide sensors on the market are significantly large because these sensors utilize non-dispersive infrared (NDIR) gas sensing techniques.
However, it is still somewhat too bulky for a portable carbon dioxide alert device.
The innovative use of MEMS microphones for carbon dioxide detection allows for a significant reduction in the required volume of the optical chamber in the infrared absorption method.
This small photoacoustic carbon dioxide sensor provides an accuracy of ±(40 ppm + 5% MV) in the 400 - 5000 ppm measuring range.
Please note that this sensor should be kept away from vibration sources, direct sunlight, and heat sources during use.
Making a CO2 Concentration Detection Card with Infrared SCD41 Photoacoustic Sensor ► https://community.dfrobot.com/makelog...


Materials:
Infrared Carbon Dioxide Sensor x1 ►
https://www.dfrobot.com/product-2646....
Beetle ESP32-C3 x1 ►
https://www.dfrobot.com/product-2566....
1.47" 172×320 IPS LCD Display x1 ►
https://www.dfrobot.com/product-2638....
RGB LED strip x1 ►
https://www.dfrobot.com/product-2255....
3.7V battery x1
3D printed shell x1
Acrylic Board x1
Switch x1

GitHub:
https://github.com/DFRobot/CO2_Concen...

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Timestamps:
What's a CO2 concentration detection keychain like? 00:00
Why do we pick a photoacoustic CO2 sensor? 00:36
How a photoacoustic CO2 sensor works. 01:12
How to make a portable carbon dioxide alert keychain? 02:35
Outro. 03:21

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