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    • SGP40 VOC Sensor
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      • Raspberry Pi
      • Qualcomm Snapdragon
      • Arduino
      • Cypress PSoC Series
      • Generic Linux Support
      • Thingstream MQTT IoT Sensor Starter Kit
    • Applications
      • Sensors for Ventilation
      • CO2 Monitor Reference Design
      • SHTC3 BLE Beacon Development Kit
      • Directional Wind Meter Using SDP3x
      • Smart Speaker
      • Archive
        • On/Off Body Detection
        • Perspiration
        • Antifogging in VR Goggles
    • Labs
      • #21 - Using an RJ45 Breakout Board Connect with Evaluation Kit Cables
      • #20 - Integrate Flex-PCB Sensors into Prototyping Setups
      • #19 - Smart Factory Particle Monitor Network
      • #18 - Inhalation Application Benefits
      • #17 - Sleep Analysis and Pulse Monitor
      • #16 - Thermal Comfort Sensor
      • #15 - Anti-Fogging for Bathroom Mirrors
      • #14 - Improved Puff Sensing of Inhalation Devices
      • #13 - Spirometer
      • #12 - Breath Detection
      • #11 - Stress, Mood and Emotion Sensing
      • #10 - CO2 Sensing in Car
      • #9 - Milk Fat Concentration Sensor
      • #8 - Presence Detection with IR Sensor
      • #7 - RH Sensor Trigger for BLE Beacon
      • #6 - Smart Inhaler
      • #5 - Windshield Ice Detector
      • >> See All Labs Ideas
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      • Wearable Development Kit: Build Your Own Device
      • Wearable Development Kit: Logging Data
      • Raspberry Pi: SFM Software Package
      • Raspberry Pi: Alexa with Indoor Air Quality
      • Raspberry Pi: Using Flow Sensors
      • Raspberry Pi: Weather Station
      • Arduino: Create Your Own CO2 Monitor
      • Arduino: Stand-Alone Liquid Flow Meter
      • Arduino: Interface for Liquid Flow Sensors
      • Arduino: Weather Station
      • Arduino: Closed Loop Volume Controller Using Liquid Flow Sensors
      • Arduino: Interface for Multiple SF06 Liquid Flow Sensors
      • Arduino: Interface for SF06 Liquid Flow Sensors with Level Shifter
      • Arduino: CAN Bus Flow Meter
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  • CO2 Monitor Reference Design

     

     

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  • CO2 Monitor Reference Design

CO2 Monitor Reference Design

Sensirion provides a low-cost CO2 monitor reference design to enable IoT and HVAC companies to rapidly develop their own CO2 monitor solution. Due to the pandemic, there is an increased demand to measure indoor CO2 concentrations. Scientific studies indicate that COVID-19 is airborne resulting in an increasing demand to keep CO2 concentrations in schools, offices and other crowded indoor environments monitored. Simple CO2 monitors help to know when it's time to ventilate the room.

Here is an overview of the topics on this website:

  • Use Case: CO2 Monitor
  • CO2 Monitor App
  • Advantages of Using the CO2 Monitor Reference Design
  • Contact Us: How to Go from Reference Design to a Product?
  • Maker Tutorial: Create Your Own CO2 Monitor


Why to Measure CO2 Indoors?

Too much CO2 in the air results in a stuffy climate, decreasing occupant work performance and increasing risk of infection with viruses. Since indoor CO2 is mostly emitted from humans, there is a correlation between indoor CO2 concentration and exhaled air. Exhaled air contains human aerosols, which might carry viruses like COVID-19. Therefore, CO2 concentration can be used as a trigger to ventilate for lower airborne virus infection risks. Especially in winter, or when outside air pollution levels are high, it is beneficial for occupants to ventilate only as needed. CO2 monitors help to trigger ventilation and to create awareness for efficient ventilation routines, especially in schools without automated ventilation systems.


Use Case: CO2 Monitor

Efficient ventilation, an increase in productivity and the possibility of reducing virus infection: CO2 monitors can be widely used in homes, schools, institutions, companies and many more. A CO2 monitor, which works like a traffic light offers a simple but user-friendly solution.

The CO2 monitor comes already calibrated and only needs to be connected to electricity. The LED display can be used immediately for CO2 monitoring. Whenever possible, the CO2 monitor should be placed at eye level and not directly next to windows or people.

The LED light then informs occpupants via three color levels about the CO2 concentration level in their room. The top part of the CO2 monitor is made of transparent plastic and provides a well visible light indication.

The standard thresholds are as follows:

  • Green: <1000 ppm
  • Yellow: 1000 - 1600 ppm
  • Red: > 1600 ppm


Users who need more detailed information, can use the CO2 monitoring app to read out the precise concentration via Bluetooth.

Features

  • Enables efficient ventilation thanks to intuitive light indication – no complicated displays
  • Advanced CO2 history and data download via app
  • Wall- or tabletop mounting, both possible
  • USB powered - multiple power sources possible (e.g. powerbank, laptop, USB AC adapter etc.)
  • Highest CO2 measurement accuracy with Sensirion's established SCD30 CO2 sensor: ±(30 ppm + 3% of measured value)

CO2 Monitor App

The CO2 monitor reference design was created for companies, which like to develop their own commercial CO2 monitor relying on their individual supply chains. It is not intended as an Arduino-based maker project, but as the foundation for developing a robust high-volume low-cost CO2 monitor.

Sensirion provides the mechanical design and electrical design for companies with the intention to make a commercial CO2 monitor on request.


Features of the CO2 Monitoring App

  • Displays precise real-time CO2 concentration
  • Three months of historic data (time chart: +8000 data points)
  • Data export & download from app
  • Manage multiple monitors in one app
  • Set thresholds of LED color via app
  • Set light intensity of LED via app

Advantages of Using the CO2 Monitor Reference Design

  • Fast-time to market
  • Reduced development costs
  • Use a well-tested reference design from the sensor expert
  • High volume, low-cost monitor design targeting an affordable re-sale price
  • Footprint ready for both NDIR SCD30 and PAS SCD40 sensors

How to Go from Reference Design to a Product?

Please reach out to us to discuss the next steps!

CO2-Monitor-referencedesign

CO2-monitor-referencedesign
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Maker Tutorial: Create Your Own CO2 Monitor

For our maker community we gladly provide a tutorial enabling the setup of a CO2 monitor using our SCD30 CO2 sensor for sending CO2 measurements via Bluetooth to nearby phones. In this tutorial we guide you through all necessary steps to build your own monitor. Furthermore, we provide a compatible app for Android and iOS.

Learn more about the hardware, software and monitor setup and kick-start your own project now.

Check out the tutorial here.

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