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The concentration of carbon dioxide (0.03% usuallly) is related to daily life. Recently, there’s a study showing that the atmospheric CO2 content has reached 0.0385% (385 ppm) which is the highest value since 2.1 million years. The raise of atmospheric CO2 content to some extent results in global climate change. How to accurately measure the carbon dioxide gas concentration is becoming a universal research topic.
Analog Infrared CO2 Sensor For Arduino Tutorial:
ESP32 Arduino: Using an infrared CO2 sensor
ESP32 Arduino: Temperature, humidity and CO2 concentration web server
Gravity CO2 Sensor Selection Guide | |||
Product Name | Gravity:Analog Electrochemistry CO2 Sensor | Gravity:Analog IR CO2 Sensor | Gravity:UART IR CO2 Sensor |
SKU | SEN0159 | SEN0219 | SEN0220 |
Operation Voltage | 3.7~5V | 4.5~5.5V | 4.5~5.5V |
Output |
Gravity: Analog
(Analog2.7~4.1V)
+
3P Header Digital Output(Alarm):0~VCC Level
|
Gravity: Analog
(Analog Output 0.4~2V)
|
Gravity: UART
(0~3.3V Level)
|
Measurement Principle |
Electrochemistry
(Solid electrolyte battery principle)
|
NDIR(non-dispersive infrared) | NDIR(non-dispersive infrared) |
Measurement Range | 0~10000 ppm | 0~5000 ppm | 0~50000 ppm |
Accuracy | ±100ppm@400ppm | ±(100ppm + 6% readings) | ±(100ppm + 6% readings) |
Response Time | <20s | <90s | <30s |
Average Power | <1W | <430mW@5V | <430mW@5V |
Operation Temperature | -20℃~50℃ | 0℃~50℃ | 0℃~50℃ |
Operation Humidity | 0~95% RH (No condensation) | 0~95% RH (No condensation) | 0~95% RH (No condensation) |
Lifespan | >1 years | >5 years | >5 years |
Dimension
(PCB)
|
32*42 mm | 37*69 mm | 21*27.1 mm |
Features |
1.Large Range
2.Adjustable Alarm Threshold
3.Fast Response
4.Analog Output
|
1.High Accuracy
2.Long Lifespan
3.Auto Temperature Compensation
4.Water Vapor Interference Resistance
5.Ananglog Output
|
1.High Accuracy
2.Large Range
3.Long Lifespan
4.Auto Temperature Compensation
5.Water Vapor Interference Resistance
6.3.3V UART Output
|