What is CO2 Sensor for Air Quality Monitoring: Manufacturers
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A CO2 sensor for air quality monitoring is a device that measures carbon dioxide concentration in indoor or outdoor environments to assess ventilation effectiveness and overall air quality. These sensors are widely used in smart buildings, HVAC systems, offices, schools, industrial facilities, and healthcare environments to improve occupant comfort, safety and energy efficiency.
How CO2 sensor works?
Leading manufacturers of CO2 sensors offer cutting-edge technologies such as Non-Dispersive Infrared (NDIR) sensors, which provide high accuracy and reliability in detecting CO2 levels. The CO2 sensor has been developed to address the measurement requirement of concentration of CO2 in the air. It is mainly used to monitor air quality indoors and is used for various applications such as air conditioners, air purifiers, ventilators, smart speakers, thermostats, baby monitors, indoor air quality monitors, smart lighting, outdoor lighting, in-cabin air quality monitoring units, etc.
Example #1: Infineon Technologies AC has launched a CO2 sensor with part number XENSIV PAS CO2. This sensor has a built-in microcontroller that converts the CO2 value to ppm. It supports various interfaces viz. I2C, UART, and PWM and works based on the PAS (photoacoustic spectroscopy) principle. This sensor uses a MEMS microphone that detects changes in pressure generated by CO2 molecules within the cavity of the sensor.
Example #2: Process Sensing Technologies offers NDIR (Non-dispersive Infrared) sensors. This sensor contains an infrared source, light tube, BPF (Band Pass Filter), and piezoelectric detector. The infrared source and detector are placed opposite each other. When CO2 gas is absent in between them, the detector produces more output. When CO2 gas is present in between them, the detector produces less output. For CO2 gas, the sensor uses a common wavelength of about which is absorbed by CO2 and not by other gases.
Benefits or advantages of CO2 sensor
Following are the benefits or advantages of CO2 sensors:
- It reduces energy costs.
- It is available in a small size which saves space on end products.
- It is available in various configurations which provides flexibility to customers.
- It is easy to integrate into the system.
- It offers high-quality data.
- It complies with smart building standards.
CO2 sensor Manufacturers
The following table mentions popular manufacturers of CO2 sensors.
| Manufacturers | Description |
|---|---|
| Infineon Technologies | Part no. XENSIV TM PAS CO2 (As described above) Operating ppm range: 0 to 32000 Supply voltage: 12 V (Emitter), 3.3 V (Other components) Refer www.infineon.com for more information Skype Call Infineon Service Center: +49 89 234 65555 |
| SST Sensing Ltd. UK | Many products are available with various parameters viz. range, power consumption, response time, analog output, etc. Visit website sstsensing.com for more information Email: sales@sstsensing.com |
| Process Sensing Technologies | The company develops NDIR sensors as explained above. Website: processsensing.com |
| Vernier | CO2 gas sensors with low range (0 to 10K ppm) and high range (0 to 100K ppm) are available. Website: vernier.com Email: info@vernier.com |
| Edinburgh sensors, Livingston, UK | The company manufactures NDIR-based gas sensors to detect CO2, CO, CH4, and N2O. Website: edinburghsensors.com Email: alison.winn@edinst.com |
- Other leading CO2 sensor manufacturers include Sensirion, Vaisala, Honeywell, Amphenol Advanced Sensors, Senseair and Figaro Engineering.
Conclusion
A CO2 sensor is an air quality monitoring device that detects and measures carbon dioxide levels, typically in parts per million (ppm), to help maintain healthy indoor environments and optimize ventilation systems. Common sensor technologies include NDIR (Non-Dispersive Infrared) and photoacoustic sensing.
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