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Note:

This product is discontinued, and replaced by this SenseCAP NDIR CO2 Sensor that supports MODBUS-RTU RS485 and SDI-12, which will ensure more stable monitoring and collection of CO2 level. This new CO2 sensor can work with Arduino, Seeeduino, and Raspberry, etc., conveniently for you to build IoT projects with ease.

Note

Please send email to sensecap[at]seeed[dot]cc to request any technological support for this product.

Features

High performance: high accuracy, fast response, and superior stability
Sensirion NDIR SCD30 Sensor: compact size, best performance-to-price ratio
User-friendly: fully-calibrated, easy to install and integrate
Wide-range Power Supply: 5V ~ 16V
Wide Range & High Accuracy: 400ppm ~ 10,000 ppm, ±(30 ppm + 3%MV)

CO2 has a large impact on us, human activities, plants, and animals, basically everything on this planet. In agriculture, CO2 is vital for photosynthesis, and increases in CO2 concentration could be beneficial to certain crops such as wheat, rice, and soya beans, etc. [Source: Climate Change and World Agriculture] Whereas, a high CO2 level may cause asphyxiation to human and animals. The CO2 emissions trapped in the atmosphere is the main cause of global warming. CO2 also causes the ocean to become acid, which causes harm to life in the ocean. Hence, getting access to the data on the CO2 level is important. With the data available, we will know what actions to take in different circumstances.

This CO2 Sensor is a digital NDIR (nondispersive infrared) sensor based on the Sensirion SCD30 sensor module, which enables the highest accuracy in the measurement of CO2 level in the atmosphere continuously and accurately for long-term use. It’s designed with a built-in calibration functionality, making it more accurate and reliable in measurement. We’ve also added a specially-designed PTFE filter which allows airflow and ensures fast response. It comes with UART and I2C interfaces, compact in size, can be easily integrated into various application scenarios.

This product also has two other sensors (humidity and temperature) on board. Please see the detailed specifications of each parameter below.

Specifications

CO2
Parameters	Conditions	Value
Measurement Range	–	0 to 40,000 ppm
Accuracy	400 to 10,000ppm	± (30 ppm + 3 %MV)
Repeatability	400 to 10,000ppm	±10 ppm
Temperature Stability	T = 0 … 50°C, 400 ppm – 10’000 ppm	±2.5 ppm/℃
Response Time	τ63%	20s
Accuracy Drift over Lifetime	400 ppm – 10’000 ppm	± 50ppm

Humidity
Parameters	Conditions	Value
Measurement Range	–	0 %RH – 100 %RH
Accuracy	25°C, 0 – 100 %RH	±3%RH
Repeatability	–	± 0.1 %RH
Response Time	τ63%	8s
Accuracy Drift	–	< 0.25 %RH / year

Temperature
Parameters	Conditions	Value
Measurement Range	–	– 40°C – 70°C
Accuracy	0–50°C	± (0.4°C + 0.023 × (T [°C] – 25°C))
Repeatability	–	± 0.1°C
Response Time	τ63%	> 10s
Accuracy Drift	–	< 0.03 °C / year