Infineon Technologies has developed a disruptive CO2 sensor, based on photoacoustic spectroscopy (PAS): the XENSIV PAS210. This sensor has been designed especially for Smart home applications and building automation, like indoor air quality IoT devices such as air purifiers, thermostats, weather stations and personal assistants. The sensor helps to improve the indoor air quality in a timely and energy efficient manner. Based on an extensive portfolio of patents around the PAS technology, PAS210 will not only enable high volume and cost sensitive CO2 sensing applications: it will also pave the road for the detection of other gases in the future. 

PAS210 is a real CO2 sensor in an unprecedented small form factor, enabled by the unique PAS detection principle. The sensor saves more than 75 per cent space in customer end products, compared to commercially available real CO2 sensors. Its direct ppm readings, SMD capability and simple design allow for an easy and fast integration in low and high volume applications alike. The integrated microcontroller converts the MEMS microphone output into a ppm reading, which is available in three output-formats: the serial I²C, UART or PWM interface. The sensor’s measurement capabilities cover a range from 0 ppm to 10,000 ppm, with an accuracy of ± 30 ppm, or ±3 per cent of the reading. In a pulsed mode, the sensor is designed to have a lifetime of ten years.

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