CO2 sensors

Highly accurate and compact XENSIV™ CO2 photoacoustic spectroscopy (PAS)-based gas sensors

anchor

Overview

Infineon’s XENSIV™ PAS CO2 sensor provides accurate measurements of the indoor air quality and enables the implementation of energy-efficient strategies for a healthy indoor environment. The PAS sensor technology is enabled by the exceptional sensitivity of the acoustic detector which reduces the size required by more than 75 percent compared to contemporary NDIR CO2 sensors.

Key Features

  • Exceptional small form factor
  • High accuracy CO2 level readings
  • Fulfillment of IAQ standards
  • Self-calibration algorithms
  • SMD package in tape and reel
  • UART, I²C, PWM interfaces
  • Easy PCB assembly
  • ISO 20653:2013-02 compliant design

Products

About

XENSIV™ PAS CO2 sensor based on photoacoustic spectroscopy (PAS)

CO2 sensors are used to monitor the indoor environments for improved health, well-being, and energy efficiency. Poor ventilation in heavily insulated buildings can result in lower oxygen levels and higher concentrations of carbon dioxide (CO2). Even moderate levels of CO2 can have a negative impact on health and productivity.

Infineon, a global leader in sensor technology, offers the XENSIV™ PAS CO2 as a smart sensor solution that measures the real CO2 concentration levels and provides reliable real-time data. Infineon’s XENSIV™ PAS CO2 sensor leverages photoacoustic spectroscopy (PAS) technology to provide an exceptionally small, real CO2 sensor that is both highly accurate and cost-effective. It integrates a photoacoustic transducer, including an acoustic detector, infrared source, and optical filter; a microcontroller for signal processing and a MOSFET chip to drive the infrared source. The exceptional sensitivity of the acoustic detector coupled with the integrated PCB design reduces space requirements by more than 75 percent compared to conventional NDIR CO2 sensors.

Integrate XENSIV™ PAS CO2 easily into your indoor solutions to meet the green building certification standards.

WELL™ and LEED™ green building certification systems

Green buildings have become a top priority for organizations seeking to promote occupants' well-being, boost productivity, reduce energy costs, and meet environmental, social, and governance (ESG) goals.

Infineon’s XENSIV™ PAS CO2 gas sensors play a crucial role in supporting five key WELL™ features, enabling buildings to earn a maximum of 6 WELL™ points. These features include:

  • Enhancing occupant wellbeing, comfort, and productivity
  • Improving operating efficiency and reducing energy costs through Demand Control Ventilation
  • Reducing CO2 emissions and conserving energy
  • Minimizing the risk of human exposure to hazardous substances like mercury and lead

A recent assessment by GREENMAP, a leading provider of WELL™ performance testing and LEED™ verification, has confirmed that the XENSIV™ PASCO2V01 sensor meets the rigorous performance requirements of the international WELL™ green building certification system, as well as the international LEED™ green building certification system, contributing to 6 LEED™ credits and enabling buildings to earn a maximum of 28 LEED™ points.

Infineon’s XENSIV™ PAS CO2 gas sensors are designed to meet the most recent indoor air quality regulatory requirements, including California's Title 24 and ASHRAE 62.1 standards.

CO2 module sensor types

There are three CO2 sensor types in the market today.

  • Photoacoustic spectroscopy (PAS): Measures CO2 levels by using sound waves
  • Non-dispersive infrared (NDIR): Measures CO2 levels by detecting the absorption of infrared light by CO2 molecules
  • Electrochemical (EC): Measures CO2 levels by detecting the electric current generated by a reaction between CO2 and a chemical diode

XENSIV™ PAS CO2 sensor is compliant with all major indoor air quality (IAQ) regulations and standards including WELL, LEED, Title 24, and ASHRAE 62.1. Infineon’s CO2 sensor is four times smaller and three times lighter than conventional NDIR CO2 sensors and its robust and efficient design outperforms the accuracy of EC CO2 sensors while being cost efficient. The implementation of MEMS technology sets the XENSIV™ PAS CO2 sensor apart from its counterparts in its precision and consistency. 

The XENSIV™ PAS CO2 sensor enables smart CO2 measurements which makes it the ideal solution for smart home and building automation applications.

Innovative environmental sensor technology from Infineon

XENSIV™ PAS CO2 sensor’s PCB is integrated with:

  •  The PAS transducer (including a detector, infrared source, and optical filter)
  •  A microcontroller (for signal processing and algorithms)
  •  A MOSFET chip (to drive the infrared source)

The microcontroller runs ppm calculations as well as advanced compensation and configuration algorithms resulting in plug-and-play functionality making the system integration easier for you. 

The exceptional sensitivity of this acoustic detector provides unmatched precision, while its small size reduces space requirements by more than 75% compared to other commercially available real CO2 sensors making it the right fit for various applications. 

Deliver superior quality products using Infineon’s XENSIV™ PAS CO2 sensors.

Photoacoustic spectroscopy (PAS) principle

When pulses of light from an infrared source pass through an optical filter tuned specifically to the CO2 absorption wavelength (λ= 4.2 µm), the CO2 molecules inside the measurement chamber absorb this filtered light. As a result, the CO2 molecules vibrate and generate a pressure wave with each pulse (photoacoustic effect). 

Infineon’s highly sensitive MEMS acoustic detector detects the pressure change generated by the CO2 molecules within the sensor cavity, and the microcontroller converts the output into a CO2 concentration reading. To achieve a ppm reading as accurate as possible, the acoustic detector is optimized for low-frequency operation, and the absorption chamber is acoustically isolated from external noise.

The XENSIV™ PAS CO2 sensor achieves an accurate ppm reading when it is optimized for low-frequency operation and provides robustness against external acoustic noise. 

See our trainings and webinars about gas sensors

In this section, you will find informative and engaging online trainings and webinars about gas sensors.

From the fundamental of gas sensors to their practical implementation in real-world, our online resources cover a wide range of topics to help you stay up to date with the latest advancements in this rapidly evolving field.

Check out our curated online content and stay ahead in the world of gas sensors.

Webinar: Introducing the XENSIV™ CO2 5V sensor
Webinar: cut energy costs with Smart Thermostats
Webinar: measure CO2 concentration and save costs

XENSIV™ PAS CO2 sensor based on photoacoustic spectroscopy (PAS)

CO2 sensors are used to monitor the indoor environments for improved health, well-being, and energy efficiency. Poor ventilation in heavily insulated buildings can result in lower oxygen levels and higher concentrations of carbon dioxide (CO2). Even moderate levels of CO2 can have a negative impact on health and productivity.

Infineon, a global leader in sensor technology, offers the XENSIV™ PAS CO2 as a smart sensor solution that measures the real CO2 concentration levels and provides reliable real-time data. Infineon’s XENSIV™ PAS CO2 sensor leverages photoacoustic spectroscopy (PAS) technology to provide an exceptionally small, real CO2 sensor that is both highly accurate and cost-effective. It integrates a photoacoustic transducer, including an acoustic detector, infrared source, and optical filter; a microcontroller for signal processing and a MOSFET chip to drive the infrared source. The exceptional sensitivity of the acoustic detector coupled with the integrated PCB design reduces space requirements by more than 75 percent compared to conventional NDIR CO2 sensors.

Integrate XENSIV™ PAS CO2 easily into your indoor solutions to meet the green building certification standards.

WELL™ and LEED™ green building certification systems

Green buildings have become a top priority for organizations seeking to promote occupants' well-being, boost productivity, reduce energy costs, and meet environmental, social, and governance (ESG) goals.

Infineon’s XENSIV™ PAS CO2 gas sensors play a crucial role in supporting five key WELL™ features, enabling buildings to earn a maximum of 6 WELL™ points. These features include:

  • Enhancing occupant wellbeing, comfort, and productivity
  • Improving operating efficiency and reducing energy costs through Demand Control Ventilation
  • Reducing CO2 emissions and conserving energy
  • Minimizing the risk of human exposure to hazardous substances like mercury and lead

A recent assessment by GREENMAP, a leading provider of WELL™ performance testing and LEED™ verification, has confirmed that the XENSIV™ PASCO2V01 sensor meets the rigorous performance requirements of the international WELL™ green building certification system, as well as the international LEED™ green building certification system, contributing to 6 LEED™ credits and enabling buildings to earn a maximum of 28 LEED™ points.

Infineon’s XENSIV™ PAS CO2 gas sensors are designed to meet the most recent indoor air quality regulatory requirements, including California's Title 24 and ASHRAE 62.1 standards.

CO2 module sensor types

There are three CO2 sensor types in the market today.

  • Photoacoustic spectroscopy (PAS): Measures CO2 levels by using sound waves
  • Non-dispersive infrared (NDIR): Measures CO2 levels by detecting the absorption of infrared light by CO2 molecules
  • Electrochemical (EC): Measures CO2 levels by detecting the electric current generated by a reaction between CO2 and a chemical diode

XENSIV™ PAS CO2 sensor is compliant with all major indoor air quality (IAQ) regulations and standards including WELL, LEED, Title 24, and ASHRAE 62.1. Infineon’s CO2 sensor is four times smaller and three times lighter than conventional NDIR CO2 sensors and its robust and efficient design outperforms the accuracy of EC CO2 sensors while being cost efficient. The implementation of MEMS technology sets the XENSIV™ PAS CO2 sensor apart from its counterparts in its precision and consistency. 

The XENSIV™ PAS CO2 sensor enables smart CO2 measurements which makes it the ideal solution for smart home and building automation applications.

Innovative environmental sensor technology from Infineon

XENSIV™ PAS CO2 sensor’s PCB is integrated with:

  •  The PAS transducer (including a detector, infrared source, and optical filter)
  •  A microcontroller (for signal processing and algorithms)
  •  A MOSFET chip (to drive the infrared source)

The microcontroller runs ppm calculations as well as advanced compensation and configuration algorithms resulting in plug-and-play functionality making the system integration easier for you. 

The exceptional sensitivity of this acoustic detector provides unmatched precision, while its small size reduces space requirements by more than 75% compared to other commercially available real CO2 sensors making it the right fit for various applications. 

Deliver superior quality products using Infineon’s XENSIV™ PAS CO2 sensors.

Photoacoustic spectroscopy (PAS) principle

When pulses of light from an infrared source pass through an optical filter tuned specifically to the CO2 absorption wavelength (λ= 4.2 µm), the CO2 molecules inside the measurement chamber absorb this filtered light. As a result, the CO2 molecules vibrate and generate a pressure wave with each pulse (photoacoustic effect). 

Infineon’s highly sensitive MEMS acoustic detector detects the pressure change generated by the CO2 molecules within the sensor cavity, and the microcontroller converts the output into a CO2 concentration reading. To achieve a ppm reading as accurate as possible, the acoustic detector is optimized for low-frequency operation, and the absorption chamber is acoustically isolated from external noise.

The XENSIV™ PAS CO2 sensor achieves an accurate ppm reading when it is optimized for low-frequency operation and provides robustness against external acoustic noise. 

See our trainings and webinars about gas sensors

In this section, you will find informative and engaging online trainings and webinars about gas sensors.

From the fundamental of gas sensors to their practical implementation in real-world, our online resources cover a wide range of topics to help you stay up to date with the latest advancements in this rapidly evolving field.

Check out our curated online content and stay ahead in the world of gas sensors.

Webinar: Introducing the XENSIV™ CO2 5V sensor
Webinar: cut energy costs with Smart Thermostats
Webinar: measure CO2 concentration and save costs

Documents

Documents

Design resources

Developer community

{ "ctalist":[ { "link" : "https://community.infineon.com/t5/forums/postpage/choose-node/true", "label" : "Ask the community ", "labelEn" : "Ask the community " }, { "link" : "https://community.infineon.com/t5/Forums/ct-p/products", "label" : "View all discussions ", "labelEn" : "View all discussions " } ] }