SKU: SEN0159
The article introduces the Gravity: Analog Electrochemical CO2 Sensor, emphasizing its significance in measuring CO2 concentrations for environmental protection. It explains the sensor's functionality, where the output voltage decreases as CO2 levels rise, and how the potentiometer sets a voltage threshold to activate a digital signal when CO2 concentration is high.
Downloadable Resources
1. Example Code for Arduino-CO2 Sensing
Explore how to measure CO2 levels using Arduino and DFRobot's CO2 sensor with detailed hardware and software setup, calibration, and sample code for precise readings.
Reference
This guide explores the MG-811 electrochemical gas sensor, highlighting its CO2 sensitivity, calibration requirements, and power supply considerations to ensure accurate and reliable measurements.
FAQ
Choosing a suitable CO2 sensor requires consideration of multiple factors, including the sensor's accuracy, measurement range, response time, reliability, price, and more. Additionally, it is important to select the appropriate sensor type based on the specific needs of the application, such as wall-mounted, portable, or embedded. You can also refer to this CO2 sensor selection guide for further assistance.
Arduino UNO R4 and R3 have different ADC accuracies, so the 1024 (2^10) in the code needs to be changed to 4096 (2^12)
This sensor probe operates at 6V, we have integrated a boost circuit on the board, but this will draw a lot of current when using the sensor.
So if you are using a USB port to power the Arduino, this may often not be enough.
We recommend that you use a VIN or Barrel jack (DC2.1) to power the Arduino with 7~12V.
The output voltage of this sensor is 0~5V, while the ESP32 ADC pin tolerance is 3.3V. so it is not recommended to connect it to the ESP32 for use.
CO2 sensors require regular calibration to ensure accurate measurement of CO2 concentration. In addition, the sensor should be kept clean, and the sensor filter should be replaced regularly to prevent the accumulation of dust or other particles that may affect measurement accuracy.
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