Particularly accurate measurement with reduced form factor: XENSIV PAS CO2 sensor from Infineon at Rutronik

12/09/2021 Know-How

Less susceptible to interference: the XENSIV™ PAS CO2 sensor uses the principle of photoacoustic spectroscopy (PAS), which enables a significant reduction in form factor and at the same time a lower purchase price. Since PAS, in contrast to the established NDIR technology, dispenses with a large number of optical components, the sensor's susceptibility to interference is reduced. The combination of a small form factor (13.8 x 14 x 7.5 mm) and SMD technology enables easier integration into volume applications. The XENSIVTM PAS CO2 is ideally suited for use in demand-controlled ventilation systems, air conditioning and air purifiers, indoor air quality monitors, CO2 ventilation alarms and emission controls, and IoT / smart home / smart city management. The Infineon range is available at

Using advanced compensation and self-calibration algorithms, the sensor has a durable and consistently high measurement quality. The accuracy for measurements in a range from 0 to 10,000 ppm (specified) is ±30 ppm or ±3 percent of the measured value.


Quick and easy evaluation
The Xensiv™ PAS CO2 Sensor2Go Evaluation Kit and the Xensiv™ PAS CO2 Mini Evaluation Board are two development components provided by Infineon. The Sensor2Go evaluation kit impresses with simple plug&play via micro-USB cable, whereas the Mini Evaluation Board is a low-cost way to integrate the sensor on development boards using a standard pin header.


Further features:

  • Voltage range: 12 V (emitter) and 3.3 V (other components)
  • Power consumption: 30 mW @ 1 measurement per minute
  • Sensor output: CO2 concentration in ppm
  • Interface: I2C, UART, PWM


For more information about the XENSIVTM PAS CO2 sensor from Infineon and a direct ordering option, please visit our e-commerce platform at: <link _blank></link>

Contact Person:
Marcel Saffert | Product Sales Manager Analog & Sensors
+49 7231 801 1587 |

The XENSIV PAS CO2 sensor dispenses the need for a large number of optical components and is less susceptible to interference.