About CO2 Module

The CO2 Module is a gas sensor for measuring the carbon dioxide (CO₂) concentration. This module achieves ±50 ppm accuracy. It uses a non-dispersive infrared (NDIR) sensor manufactured in Sweden. Thanks to its low-power operation it can be powered from batteries for years. Carbon dioxide (or CO₂) is a colorless and odorless gas that is vital to life on Earth. Its nominal concentration is about 400 ppm (0.04 %). There are many occurrences of CO₂ in nature. For example humans produce CO₂ when exhaling. We have equipped the LP8 sensor with additional circuitry for efficient power management and I²C-only interfacing. This module also features three 5-pin sockets allowing you to connect HARDWARIO tags.

Important

The high concentration of CO₂ leads to acidity and various health-related problems.

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Schematic drawing

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Features

• Carbon dioxide (CO₂) sensor LP8 (SenseAir)

• Non-dispersive infrared (NDIR) technology

• Measurement range of CO₂: 0 to 10 000 ppm

• Measurement accuracy: ±50 ppm CO₂ ±3 % of reading (Note 1)

• I²C-only interface (integrated UART bridge and I/O expander)

• Constant current source for 470 mF supercap

• Long battery life-time

• 3 sockets for a HARDWARIO TOWER tag

• Low power consumption:

  • 6 µA (6 measurements per hour)

  • 61 µA (1 measurement per minute)

• Operating voltage range: 3 V to 3.6 V

• Operating temperature range: 0 to 50 °C

• Mechanical dimensions: 88 x 55 mm

Caution

Accuracy ±50 ppm is achieved after 24 days of operation and auto-calibration process.