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This is the first CO2 sensor in the Arduino market. The output voltage of the module falls as the
concentration of the CO2 increases. The potentiometer onboard is designed to set the threshold of voltage. As long as the CO2 concentration is high enough (the voltage is lower than the threshold), a digital signal (ON/OFF)
will be released.
To ease the difficulty of using this CO2 sensor, a Gravity Interface is adapted to allow plug&play. The Arduino IO expansion shield is the best match for this CO2 sensor connecting to your Arduino microcontroller.
This is an electrochemical Arduino-based CO2 sensor, it is suitable for qualitative analysis. DFRobot also developed other Infrared CO2 sensors, which are suitable for quantitative analysis.
1. Gravity: Analog Infrared CO2 Sensor For Arduino (0~5000 ppm), high precision, apply to Arduino and other microcontrollers with ADC function.
2. Gravity: UART Infrared CO2 Sensor (0-50000ppm), wide range, apply to Arduino,
Raspberry Pi and other microcontrollers with UART
function.
| Gravity CO2 Sensor Selection Guide | ||||
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|
| Product Name | Gravity: Analog Electrochemistry CO2 Sensor | Gravity: Analog IR CO2 Sensor | Gravity: UART IR CO2 Sensor | Gravity: I2C SCD41 Infrared CO2 Sensor (400 - 5000 ppm) |
| SKU | SEN0159 | SEN0219 | SEN0220 | SEN0536 |
| Operation Voltage | 3.7～5V | 4.5～5.5V | 4.5～5.5V | 3.3V-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)
|
Gravity: I2C |
| Measurement Principle |
Electrochemistry
（Solid electrolyte battery principle）
|
NDIR(non-dispersive infrared) | NDIR(non-dispersive infrared) | photoacoustic NDIR |
| Measurement Range | 0～10000 ppm | 400～5000 ppm | 0～50000 ppm | 400～5000ppm |
| Accuracy | ±100ppm@400ppm | ±(100ppm + 6% readings) | ±(100ppm + 6% readings) | ±(40 ppm + 5% MV) |
|
Response Time |
<20s | <90s | <30s | 60S |
|
Average Power |
<1W | <430mW@5V | <430mW@5V | <30mW@5V |
| Operation Temperature | -20℃～50℃ | 0℃～50℃ | 0℃～50℃ | -10℃～60℃ |
| Operation Humidity | 0～95% RH (No condensation) | 0～95% RH (No condensation) | 0～95% RH (No condensation) | 0～95% RH (No condensation) |
| Lifespan | >1 year | >5 years | >5 years | >10 years |
|
Dimension
(PCB)
|
32*42 mm | 37*69 mm | 21*27.1 mm | 32*27*8mm |
| 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
|
1.CO2, temperature, and humidity, three in one
2. Small size of 32*27*8mm
3. Low power, average current＜4mA
|
