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    Sensirion AG Switzerland
    • Home
    • Environmental Sensors
      • Humidity Sensors
        • Digital Humidity Sensor SHT4x (RH/T)
        • Digital Humidity Sensor SHT3x (RH/T)
        • Digital Humidity Sensor SHT85 (RH/T)
        • Digital Humidity Sensor SHTC3 (RH/T)
        • Digital Humidity Sensor SHTC1 (RH/T)
        • Digital Humidity and Temperature Module SCC30-DB (RH/T)
        • SF2 Filter Cap
        • SHT31 Smart Gadget Development Kit
        • Digital Humidity Sensor SHTW2 (RH/T) (NRND)
      • Temperature Sensors
        • Temperature Sensor STS3x
        • Temperature Sensor STS32
      • Multi-Pixel Gas Sensors SGP
        • VOC Sensor SGP40
        • VOC Sensor SGP30 / SGPC3 (NRND)
        • Multi-Gas, Humidity and Temperature Module SVM30 (NRND)
      • Particulate Matter Sensor SPS30
      • Carbon Dioxide Sensors
        • Carbon Dioxide Sensor SCD4x
        • Carbon Dioxide Sensor SCD30
        • Carbon Dioxide Sensor STC31
      • Formaldehyde Sensor Module SFA30
      • Nubo Air
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      • Formaldehyde Sensor SFA30

        Formaldehyde Sensing Made Easy

        The SFA30 is Sensirion’s new digital formaldehyde sensor designed for easy integration into air purifiers, demand-controlled ventilation systems, or indoor air quality monitors. Based on Sensirion’s electrochemical technology, the SFA30 offers excellent formaldehyde sensing performance with a uniquely low cross-sensitivity to other VOCs. The sensor module’s on-board SHT sensor provides accurate humidity and temperature readings and enables a fully temperature/humidity compensated and factory calibrated formaldehyde concentration output in ppb.

        More

    • Flow Sensors
      • Liquid Flow Meters
        • Lx – Compact Liquid Flow Meters
          • Liquid Flow Meter LG16
          • Liquid Flow Meter LG01
          • Liquid Flow Meter LS32-1500
        • SLx – Standalone Liquid Flow Meters
          • Liquid Flow Meter SLI
          • Liquid Flow Meter SLG
          • Liquid Flow Meter SLQ-QT105
          • Liquid Flow Meter SLQ-QT500
          • Liquid Flow Meter SLS-1500
        • Liquid Flow Sensor SLF3x
        • Liquid Flow Sensor LPG10
        • Liquid Flow Sensor LD20
        • Liquid Flow Meter Kits
        • Customized (OEM) Liquid Flow Meters
      • Mass Flow Meters for Gases
        • Mass Flow Meter SFM3000
        • Mass Flow Meters SFM3003 and SFM3013
        • Mass Flow Meter SFM3019
        • Mass Flow Meter SFM3100
        • Mass Flow Meter SFM3119
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        • Mass Flow Meter SFM3400
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        • Mass Flow Meter SFM5400
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      • Evaluation Kit SEK-Flow Sensing
      • Product Highlight

        Evaluation kit for the single-use liquid flow sensor LD20-2600B

        The LD20-2600B single-use liquid flow sensor for fast, precise and reliable measurements of the lowest flow rates in biomedical applications was successfully launched three years ago. The evaluation kit for this OEM liquid flow sensor can now also be purchased online via Sensirion's distribution network.

        Read more

    • Markets
      • Automotive
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        • Life Sciences, Diagnostics and Analytical Instruments
        • H2 Measurement
      • Medical
        • Ventilation
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      • Our Markets

        Sensirion Markets Icons

        Experts for Smart Sensor Solutions

        Sensirion's sensors are used in a wide range of markets and different applications. Our high-quality environmental and flow sensors and sensor solutions improve energy efficiency and sustainability. They increase our safety, support our health and raise the quality of life. 

        Read more

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      • Sensirion – The Sensor Company

        Sensirion Worldmap

        Sensirion Worldwide

        Founded in 1998 Sensirion has become the leading manufacturer of flow and environmental sensors solutions. The company now employs people in various countries such as the USA, South Korea, Japan, China, Taiwan, and Germany. The headquarters in Switzerland is responsible for research, development, and production. 

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      • Most Popular Employer in Switzerland 2019

        Learn more: www.sensirion.com/GPTW

         

        Top Career Openings:

        • R&D Engineer MEMS
        • Senior Software Engineer 80-100%
        • Office Manager HR and Administration


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    • Home
    • Environmental Sensors
    • Carbon Dioxide Sensors
    • Carbon Dioxide Sensor SCD4x

    CO2 Sensor SCD4x

    Breaking the Size Barrier in CO2 Sensing

    The SCD4x is Sensirion’s next generation miniature CO2 sensor that offers an unmatched price-to-performance ratio. Tape and reel packaging combined with its SMD assembly processing make the SCD4x ideal for high-volume applications.

    This sensor builds on the photoacoustic sensing principle and Sensirion’s patented PASens® and CMOSens® Technology to enable unmatched small sensor size combined with high performance. SMD compatibility and the small footprint allow cost- and space-effective integration to boost freedom of design for customers. The integrated best-in class humidity and temperature sensor enables superior on-chip signal compensation and addition RH and T outputs. Finally, the large supply voltage (2.4 V – 5.5 V), the robustness towards external stresses and the adjustable power consumption make the SCD4x the perfect fit for varying customer needs.


    Download Image

    Download Center

    Here you can find all documents of Sensirion's carbon dioxide sensor SCD4x for download.


    Features and Applications

    FeaturesApplications
    • Size: 10.1 x 10.1 x 6.5 mm3
    • Demand Controlled Ventilation
    • Mounting Type: SMD
    • Indoor Air Quality Monitoring
    • Interface: I2C
    • CO2 Ventilation Alarm
    • Supply voltage range: 2.4 to 5.5 V
    • IoT / Smart Home
    • Current consumption:
      17 mA (meas. rate = 5 s)
      0.5 mA (meas. rate = 5 min)
    • Agriculture / Green housing
    • On-Chip RH and T compensation: yes
    • Industrial
    • Output range: 0 to 40’000 ppm

    Sensor Specifications

    NameAccuracySpecified RangeLow Power Single ShotAvailable packaging type / sizePackage SizeDatasheetBuy
    SCD40±(50 ppm + 5 % of reading)400 ppm – 2'000 ppmnoTape on Reel / 60010.1 x 10.1 x 6.5 mm3DownloadComing soon
    SCD41±(40 ppm + 5 % of reading)400 ppm – 5'000 ppmyesTape on Reel / 60010.1 x 10.1 x 6.5 mm3DownloadComing soon

    SCD4x Features and Benefits

    FeaturesBenefits
    Smallest form factorHighest freedom of design
    Integrated RH + T sensorLowest integration and product cost
    Reflow solderable (SMD)Space and cost-effective assembly
    Large supply voltage rangeNo external circuitry required, no energy loss
    Superior mechanical robustnessAccurate readings right after assembly

    Typical NDIR CO2 Sensor vs. SCD4x

    FeaturesTypical NDIR CO2 SensorSCD4x CO2, RH + T Sensor
    High selectivity
    Small size
    Additional sensor Outputs
    Cost-effective Assembly
    Mechanical robustness
    Cost-effective BOM

    Start Evaluating the SCD4x Today

    The SEK-SCD41 evaluation kit has been designed for easy and cost-efficient evaluation of Sensirion’s SCD4x CO2 sensor. The kit contains a SCD41 mounted on a development board with a JST connector and through-hole pins. The included adapter cable (JST-Ethernet) connects to the SEK-SensorBridge for easy evaluation of the sensor via the SEK-ControlCenter viewer software. Finally, the kit contains a 4-pin jumper wire cable that enables fast prototyping, e.g. through integration into existing platforms (like Arduino, Raspberry Pi, etc.).

    More information (documentation, drivers, tutorials, etc.) can be found here: www.sensirion.com/my-scd-ek

    Compile your own environmental sensing evaluation kit at: www.sensirion.com/sek


    Efficient Ventilation Helps to Reduce the Risk of Virus Transmission

    Pupils are back in schools all over the world. Despite the coronavirus pandemic, they are sitting side by side in closed rooms for several hours. Of course, this raises concerns about virus transmission.Tiny droplets (known as aerosols) are emitted not only when people cough or sneeze, but also during normal breathing and speech. These aerosols may contain viruses, which is why frequent and effective ventilation is more important than ever. The more fresh air there is in a closed room, the less exhaled air which may contain viruses.

    Various solutions for regular and effective ventilation in enclosed rooms are currently being tested. In Germany, for example, modules equipped with CO2 sensors were used to measure air quality in school classrooms. The advantage: a CO2 warning system is easy to use, intuitively understandable thanks to the traffic light system, and measures with high accuracy. A CO2 warning system ensures regular and effective ventilation, so instructors and pupils can work together calmly and with a little more security and freedom from worry. In addition to reducing the risk of transmitting viruses such as COVID-19, CO2 reduction measures also increase concentration capacity – another positive effect.

    Learn more


    PASens® Technology

    PASens® Technology is based on the photoacoustic sensing principle. The photoacoustic sensing principle allows extreme miniaturization of the CO2 sensor without compromising sensor performance due to the fact that the sensor sensitivity is independent of the optical cavity size. The reduced size and the smaller number of integrated components result in a highly price-efficient BOM structure. Thanks to the miniaturizing and the economical BOM structure of these new CO2 sensor, the SCD4x will open up numerous possibilities for a whole new set of products and applications.

    Click here to learn more about the measurement principle and key features of PASens® Technology.


    Environmental Sensing

    Environmental conditions have a major impact on our well-being, comfort, and productivity. Sensirion’s sensor solutions provide detailed and reliable data on key environmental parameters such as humidity, temperature, volatile organic compounds (VOCs), particulate matter (PM2.5), formaldehyde and CO2. Environmental Sensing opens up new possibilities to create smarter devices that improve our comfort and well-being as well as increase energy efficiency in a wide variety of applications.
    We accompany you through the entire product development process, from the initial idea to product launch and beyond. Our expertise ranges from prototype construction, design-in support and use-case development to inline testing at the mass production stage.

    More about environmental sensing


    Related Products

    Sensirion Environmental Sensing Co2 Preview

    CO2 and RH/T Sensor Module

    CMOSens® Technology for IR detection enables highly accurate carbon dioxide measurement at a competitive price.

    Technical Documents

    • Datasheet CO2 Sensor SCD4x
    • Design-In Guide CO2 Sensor SCD4x
    • Handling Instructions CO2 Sensor SCD4x
    • STEP File CO2 Sensor SCD4x
    • Technical Description SEK-SCD41

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