Infineon XENSIV PAS CO2 Shield2Go board enables carbon dioxide measurements

Infineon has added new a shied to its Shield2Go ecosystem with the XENSIV PAS CO2 Shield2Go board integrating the company’s XENSIV PAS CO2 sensor capable of measuring carbon dioxide levels.

We first wrote about the Shield2Go module with the OPTIGA Trust-M evaluation kit integrating a security module, but the family also includes various sensors shield and microcontroller boards notably the XMC 2Go board. The new Shield2Go board can be used for both air quality monitoring and controlled ventilation for energy savings.



Infineon XENSIV PAS CO2 Shield2Go board

XENSIV PAS CO2 Shield2Go board specifications:

  • XENSIV PAS CO2 sensor:
    • Accuracy – ±30 ppm ±3%
    • “Advanced compensation and self-calibration algorithms”
    • Host interfaces – UART, I2C, PWM
    • Dimensions – 14 x 13.8 x 7.5 mm
  • 19x through holes and castellated holes with I2C, UART, PWM, interrupt, 5V, 3.3V, GND, plus SWD interface
  • Power Supply
    • 5V DC input
    • 12V DC DCDC boost converter to power the IR transmitter in the sensor without an external 12V power supply
  • Dimensions – Shield2Go form factor
XENSIV PAS CO2 sensor block diagram
Internal block diagram for the sensor
XMC 2go Shied2GO connection pinout diagrams
Connection diagram to XMC 2Go board (left) and pinout diagram (right)

The company provides an Arduino library for the PAS CO2 sensor mostly for the XMC 2Go, but the shield can also be used with Arduino and Raspberry Pi boards through adapters. Instructions specific to Arduino Due and Arduino Uno can also be found in the documentation on the product page, where you’ll also find a generic C++ library.

Specific applications that may benefit from the CO2 sensor include residential, commercial, and automotive HVAC solutions, Smart Home devices such as thermostats, lighting & air quality devices, as well as greenhouses and other Smart Agriculture applications.

Arduino Uno Shield2Go
XENSIV PAS Shield2Go board connected to Arduino Uno through “My IoT adapter”

Infineon XENSIV PAS CO2 Shield2Go can be purchased for about $62 on Mouser.  More details about Shield2Go sensors, MCU board, and adapters can be found on the Infineon website.

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4 Replies to “Infineon XENSIV PAS CO2 Shield2Go board enables carbon dioxide measurements”

  1. That sensor looks pretty neat. Wasn’t aware that there was an economical yet fairly accurate CO2 sensor technology besides NDIR.

      1. It costs 30$ and that’s cheap in comparison to alternatives. Footprint isn’t much of a problem when your product is built around it.

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