CO2 sensor

The crystal unit CO2 sensor for smart meters is a product with long-term stability and high measurement accuracy that promises to improve maintainability through an automatic calibration feature based on a unique calibration curve algorithm and a dual wavelength (for measurement and reference) NDIR*1 system.

For agricultural applications, it can be installed in greenhouses or plant factories to monitor the carbon dioxide concentration to help increase plant yields by supplying the carbon dioxide (CO2 application) required for photosynthesis.

In a BEMS*2 application, install the CO2 sensor in building ventilation ducts to ventilate the air when needed by monitoring the carbon dioxide concentration, therefore contributing to overall building energy conservation.

Going forward, the output interfaces will be expanded to improve compatibility with various control systems.

*1 NDIR: Non-Dispersive Infrared
*2 BEMS: Building Energy Management System

System which uses a computer to comprehensively manage ventilation, electrical, plumbing, disaster prevention, crime prevention, and other pieces of equipment. Helps improve indoor environments and promote energy conservation.


Murata Icon X Product Lineup

Murata Icon X CO2 sensor application examples

Developed for smart agriculture and building ventilation control applications which require CO2 sensors with superior long-term stability.

CO2 sensors for greenhouses and smart agriculture applications

Used in greenhouses and plant factories for the purpose of promoting photosynthesis and increasing yields by controlling the CO2 concentration.

For building ventilation control in BEMS applications

Used for the purpose of contributing to energy savings through ventilation control corresponding to CO2 concentrations.
(Measurement criteria for air quality according to the Building Management Law: CO2 concentration of 1,000 ppm)

Murata Icon X Problems with CO2 concentration control and Murata’s advantages

Murata’s CO2 sensors can be applied to various problems in CO2 concentration control.


Helps to simplify smart meter design, as well as agriculture and greenhouse problems such as the following:
  • Measurement value fluctuations due to the impact of humidity and aging degradation
  • Yield decrease when the measurement value is higher than the true value
  • Energy (energy cost) loss when the measurement value is lower than the true value
  • Manually calibrated CO2 sensors must be removed and taken out of the housing
Problems with building ventilation control and BEMS
  • Measurement value fluctuation due to aging degradation
  • CO2 concentration control criteria according to the Building Management Law (1,000 ppm)
  • Ventilation energy loss due to settings which assume drift
  • CO2 sensors are installed in high places and other locations which are difficult to access. This makes the calibration work difficult because calibration requires reference gases
Murata’s strengths in CO2 sensors
  • Maintenance-free design achieves long-term stability through our unique algorithm and structure (Ex: approximately ten years for building ventilation *Depends on the usage environment)
  • In addition to modular products for system embedding, our lineup includes models equipped with cases and cables for agricultural use which are easy to install
  • Models which are attached to building ventilation ducts are easy to replace
  • Equipped with a built-in surge protection power circuit

Technical description of CO2 sensors