What is it?

A CO2 sensor, or carbon dioxide sensor, is a crucial device designed to measure and monitor the concentration of carbon dioxide (CO2) in the surrounding environment. This sensor plays a vital role in various industries, scientific research, and indoor air quality management by providing real-time data on CO2 levels.

This sensor also measures humidity and temperature.

Key Features

• Compact and Lightweight.
• Wide input voltages.
• Ability to customize the sensor. options available: SenseAir S8, Sensirion SCD41, Sensirion SCD40.
• Zigbee wireless connection.
• Automatic and manual calibration, as well as the ability to disable calibration for working in a greenhouse or in an environment with a constantly elevated CO2 level.

Applications

Indoor Air Quality Monitoring:

CO2 sensors are commonly used in buildings to monitor indoor air quality. Elevated CO2 levels can indicate poor ventilation, and the sensors help regulate HVAC systems for optimal air quality.

Greenhouses:

CO2 sensors are used in greenhouses to optimize plant growth. By controlling CO2 levels, growers can enhance photosynthesis and improve overall plant health and yield.

Connection method

Works with Zigbee2Mqtt via external converter. or ZHA custom quirk

CO2 sensor uses a standard zigbee cluster and can theoretically be used with any other system.

Specification

• Range: 400–2000ppm (SCD41: 400–5000ppm)
• Maximum range with reduced accuracy: 0–10000ppm (SCD4X: 0–40000ppm)
• 5V USB Type-C connected to nRF52833.
• 7-48v DC input with reverse polarity protection.
• SHTC3: Temperature and Humidity sensor.
• SenseAir S8: NDIR CO2 Sensor.
• SCD40/41: Photoacoustic NDIR sensor technology PASens®.
• Zigbee 3.0
• UF2 Bootloader.
• nRF52833: 512Kb Flash + 128Kb RAM.