Gravity: PWM NDIR Infrared Carbon Dioxide / CO2 Sensor (400-5000 ppm)

FAQ

• How to choose from the many CO2 sensors on the platform?

  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.

• Why is my sensor (SEN0219) not outputting properly? What is the output frequency?

  For issues with the SEN0219 sensor, it is recommended to refer to the FAQ section of the product, which can be found in this forum post.

• How to calibrate the CO2 sensor?

  CO2 sensors need to be calibrated regularly to ensure accuracy. The usual calibration methods include manual calibration and automatic calibration. Take the Gravity: PWM Infrared Carbon Dioxide Sensor (SEN0219) as an example.

  Manual calibration Manual calibration zero point is to calibrate the zero point of the sensor by shorting the HD and GND of the sensor, and the low level needs to be maintained for more than 7 seconds. Before calibrating the zero point, please ensure that the sensor has been running stably for more than 20 minutes at a concentration of 400ppm.

  Automatic calibration The automatic calibration function means that the sensor can intelligently judge the zero point and calibrate it according to the environmental concentration after running continuously for a period of time. The calibration period is every 24 hours from the start of power-on, and the zero point of automatic calibration is 400ppm. The automatic calibration function is suitable for office and home environments.

• Does CO2 sensor need maintenance?

  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.

• What should be paid attention to when installing the CO2 sensor?

  Proper installation of CO2 sensors is crucial for accurate monitoring of indoor CO2 levels. Here are a few points to consider when installing the sensors:

  Placement: CO2 sensors should be installed in areas where CO2 levels need to be monitored, such as enclosed rooms with poor air circulation. However, they should be placed away from areas that are easily disturbed or contaminated, such as near doors, windows, and ventilation ducts.

  Avoid direct sunlight: Sensors should not be installed in direct sunlight to avoid temperature changes that may cause errors in measurements.

  Avoid contamination: Sensors should be installed in clean, dust-free, oil-free, and chemical-free areas.

  Avoid heat sources: Sensors should be placed away from heat sources to prevent high temperatures that may affect measurement accuracy.

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