Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Sensor Type | NDIR (Non-Dispersive Infrared) |
| Detection Range | 400 - 8192 ppm |
| Accuracy | ±(50 ppm + 5% reading) |
| Operating Voltage | 3.3V DC |
| Communication Interface | I2C, UART |
| Temperature Range | -40°C to 85°C |
| Humidity Range | 0% to 100% RH |
| TVOC Detection | Yes, with eCO2 calculation |
| Dimensions | 20mm x 15mm x 3mm |
| Warm-up Time | Approx. 7 days for full stability |
Anonymous
Mar 22, 2026
Rating: 4/5
Good accuracy after calibration
Initially, the readings were a bit off, but after letting it run for the recommended warm-up period and performing a baseline calibration in fresh air, it works perfectly for monitoring my indoor garden. The humidity sensor is a nice bonus.
Anonymous
Mar 19, 2026
Rating: 4/5
Great for office monitoring
We deployed five of these in our open-plan office to track air quality. They reliably alert us when ventilation is needed. The only minor issue is that the VOC sensitivity can be a bit high to alcohol-based cleaners, but that's expected behavior.
Anonymous
Mar 18, 2026
Rating: 5/5
Compact and Feature-Rich
I love how small this board is while still providing temperature, humidity, CO2, and VOC data. The documentation provided by the seller was clear, making the library installation straightforward. Highly recommended for IoT projects.
Anonymous
Mar 15, 2026
Rating: 5/5
Perfect for Home Automation Projects
This sensor module is incredibly easy to integrate with my ESP32 setup. The I2C communication is stable, and the readings for CO2 and TVOCs seem very consistent when compared to a professional meter. Great value for the price.
Anonymous
Mar 09, 2026
Rating: 3/5
Works well but needs patience
The sensor works as advertised, but you really need to wait for the initial burn-in period before trusting the numbers. If you try to use it immediately out of the box, the CO2 readings will be inaccurate. Once settled, it's solid.
Anonymous
Mar 08, 2026
Rating: 5/5
Excellent for university projects
Used this for my final year project on smart buildings. The data output is clean, and the power consumption is low enough for battery-operated prototypes. Support was also quick to answer my questions about the register map.
Q: Is there a library available for Arduino IDE?
A: Yes, there are several open-source libraries available for the Arduino IDE, such as 'Adafruit_CCS811' or 'SparkFun_CCS811'. You can install them directly via the Library Manager.
Q: How often should I recalibrate the sensor?
A: The sensor features an automatic baseline correction algorithm. However, for best accuracy, it is recommended to expose the sensor to fresh outdoor air (approx. 400ppm) once every few months to reset the baseline manually if drift is observed.
Q: Can this sensor detect carbon monoxide (CO)?
A: No, the CCS811 is specifically designed to detect Carbon Dioxide (eCO2) and Total Volatile Organic Compounds (TVOCs). It cannot detect Carbon Monoxide (CO); you would need a different sensor type for that.
Q: Does this module require an external pull-up resistor for I2C communication?
A: Most breakout boards include onboard pull-up resistors. However, if you are using the bare chip or a minimal board, we recommend adding 4.7kΩ pull-up resistors to the SDA and SCL lines for stable communication.
Q: What is the power consumption in sleep mode?
A: In sleep mode, the current consumption is typically less than 10µA, making it suitable for battery-powered applications where the sensor wakes up periodically to take measurements.
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