Infineon XENSIV™ Photoacoustic Spectroscopy (PAS) CO2 Sensor
Measure what matters the most
The Infineon XENSIV™ Photoacoustic Spectroscopy (PAS) CO2 Sensor provides superior accuracy level in an exceptionally small form factor making it the ideal solution for indoor air-quality monitoring stations, HVAC systems and IoT applications. To track the environment you are in - for improved health, productivity and overall well-being, the PAS CO2 sensor provides real-time, accurate measurements, while being more affordable and compact, overcoming the challenges of size and performance in existing CO2 sensor solutions.
Infineon's MEMS microphone, which is optimized for low-frequency operation, detects the pressure change generated by CO2 molecules within the sensor cavity. CO2 concentration is then delivered in the form of a direct ppm readout thanks to the integrated microcontroller. Highly accurate CO2 readings are guaranteed since the absorption chamber is acoustically isolated from external noise.
The XENSIV™ PAS CO2 sensor is a real carbon dioxide (CO2) sensor in an unprecedented small form factor. Designed on the basis of the photoacoustic spectroscopy (PAS) concept, the sensor saves more than 75 percent space compared to existing commercial real CO2 sensors. Its direct ppm readings, tape & reel packing, SMD capability and simple design allow for a quicker and easier integration into customers’ systems in low and high-volume applications alike.
Features & Benefits
Successful Evaluation of the Sensor
XENSIV™ PAS CO2 Sensor2Go Evaluation Kit
To ensure efficient and quick evaluation, discover the Infineon XENSIVTM PAS CO2 Sensor2Go Evaluation kit. It enables communication to a PC GUI via its micro-USB as a power management unit ensuring stable 12 V for the light source.
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The Sensor2Go evaluation kit includes:
XENSIV™ PAS CO2 Mini-Board
The XENSIV™ PAS CO2 mini-board enables easy connection to the application board with a standard 2.54 mm pin header, and without the need to go through a reflow process during the evaluation phase.
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The Mini-Board comes with the following features:
How does the photoacoustic principle work?
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 the filtered light, causing the molecules to shake and generate a pressure wave with each pulse. This is called the photoacoustic effect. The pressure change is then detected by a MEMS acoustic detector optimized for low frequency operation, and the microcontroller converts the output into a CO2 concentration reading. In order to provide accurate CO2 sensing information, the absorption chamber is acoustically isolated from external noise.
Block Diagram: Infineon XENSIV™ Photoacoustic Spectroscopy (PAS) CO2 Sensor
WATCH: How To Monitor Indoor Air Quality, Featuring Infineon’s CO2 Sensor