DFRobot Gravity Analog electrochemical CO2 Gas 5V MG-811

This is the first CO2 sensor in 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 (voltage is lower than threshold),  a digital signal (ON/OFF) will be released.

• It has MG-811 sensor module which is highly sensitive to CO2 and less sensitive to alcohol and CO, low humidity & temperature dependency. 
• Onboard heating circuit brings the best temperature for sensor to function. Internal power boosting to 6V for heating sensor best performance. 
• This sensor has an onboard conditioning circuit for amplifying output signal. 
• 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 senor connecting to your Arduino microcontroller. 

This is an electrochemical CO2 sensor, it is suitable for qualitative analysis. There are the other Infrared CO2 sensors, which could make a quantitative analysis.

Applications

Air Quality Control
Ferment Process Control
Room Temperature CO2 concentration Detection

Specification

Operating Voltage:5V
Interface: Gravity Analog
One digital output
High quality connector
Immersion gold surface
Onboard heating circuit
Size:32x42mm (1.26x1.65")

Documents

CO2 Sensor SKU:SEN0159 Wiki
Schematic                      
Layout                  
MG811 datasheet

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