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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.

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      • 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.

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    • Digital Humidity Sensor SHT3x (RH/T)

    Digital Humidity Sensor SHT3x (RH/T)

    The Industry Standard in Humidity Sensing

    The digital SHT3x humidity sensor series takes sensor technology to a new level. As the successor of the SHT2x series it sets the industry standard in humidity sensing. The SHT3x humidity sensor series consists of a low-cost version with the SHT30 humidity sensor, a standard version with the SHT31 humidity sensor, and a high-end version with the SHT35 humidity sensor. Automotive grade versions are also available. The SHT3x humidity sensor series combines multiple functions and various interfaces (I2C, analog voltage output) with a applications-friendly, very wide operating voltage range (2.15 to 5.5 V). The SHT3x humidity sensor is available in both large and small volumes.

    The SHT3x builds on a completely new and optimized CMOSens® chip, which allows for increased reliability and improved accuracy specifications. The SHT3x offers a range of new features, such as enhanced signal processing, two distinctive and user-selectable I2C addresses, an alert mode with programmable humidity and temperature limits, and communication speeds of up to 1 MHz.

    The DFN package has a footprint of 2.5 × 2.5 mm2 with a height of 0.9 mm. This allows for integration of the SHT3x into a great variety of applications. Additionally, the wide supply voltage range of 2.15 to 5.5 V and variety of available interfaces guarantee compatibility with diverse integration requirements. All in all, the SHT3x humidity sensor series incorporates 15 years of knowledge from Sensirion, the leader in the humidity sensor industry.


    Overview of SHT3x Versions

    ProductTyp. RH
    Accuracy (%RH)
    Typ.
    Temperature (°C) 
    VDD Range (V)InterfaceProtective OptionsAvailable Reel Sizes (pcs)DatasheetsBuy
    SHT30-ARP-B±3
    @10-90% RH
    ±0.3
    @0-65 °C
    2.4 to 5.5analog ratiometric voltage-2'500, 10'000Download
    SHT30-DIS-B±2
    @10-90% RH
    ±0.2
    @0-65 °C
    2.15 to 5.5I2C-2'500, 10'000Download
    SHT30A-DIS±3
    @10-90% RH
    ±0.3
    @0-65 °C
    2.4 to 5.5I2CUpon request2'500, 10'000Download
    SHT31-ARP-B±2
    @0-100% RH
    ±0.3
    @0-90 °C
    2.4 to 5.5analog ratiometric voltage-2'500, 10'000Download
    SHT31-DIS-B±2
    @0-100% RH
    ±0.2
    @0-90 °C
    2.15 to 5.5I2C-2'500, 10'000Download
    SHT31-DIS-F±2
    @0-100% RH
    ±0.2
    @0-90 °C
    2.15 to 5.5I2CFilter membrane2'500, 10'000Download
    STH31-DIS-P±2
    @0-100% RH
    ±0.2
    @0-90 °C
    2.15 to 5.5I2CProtective cover2'500, 10'000Download
    SHT31A-DIS±2
    @0-100% RH
    ±0.3
    @-40-90 °C
    2.4 to 5.5I2CUpon request2'500, 10'000Download
    SHT35-DIS-B±1.5
    @0-80% RH
    ±0.1
    @20-60 °C

    2.15 to 5.5

    I2C-2'500,
    10'000
    Download
    SHT35-DIS-F±1.5
    @0-80% RH
    ±0.1
    @20-60 °C
    2.15 to 5.5I2CFilter membrane 2'500,
    10'000
    Download
    SHT35A-DIS±1.5
    @0-80% RH
    ±0.2
    @-40-90 °C

    2.4 to 5.5

    I2CUpon request2'500,
    10'000
    Download
    • Table Overview Humidity Sensor SHT3x

    Features

    Size2.5 x 2.5 x 0.9 mm
    OutputI²C, Voltage Out
    Supply voltage range2.15 to 5.5 V
    Energy consumption4.8µW (at 2.4 V, low repeatability, 1 measurement / s)
    RH operating range0 - 100% RH
    T operating range-40 to +125°C (-40 to +257°F)
    RH response time8 sec (tau63%)

    Delivery Conditions

    PackagingTape & Reel, sealed in ESD bag
    Packaging sizes

    2'500 & 10'000 pieces per reel

     


    Download Image

    Download Center

    Here you can find all documents of Sensirion's humidity sensors for download.


    Accuracy Limits for Relative Humidity and Temperature (SHT30 and SHT31)

    Sensirion Humidity SHT3x Diagram
    Sensirion Humidity SHT3x Diagram

    Accuracy Limits for Relative Humidity and Temperature (SHT35)


    Test Our Environmental Sensors with Sensirion’s Evaluation Kits

    With plug-and-play hardware, user-friendly viewer software and compatibility with all environmental sensors, SEK-Environmental Sensing makes evaluation easier and faster than ever before. This allows our customers to focus on developing innovative sensor applications.

    Learn more


    Filter Membrane Option

    The SHT3x membrane is an PTFE film that protects the sensor opening from water and dust according to IP67. It thus allows sensor use under harsh environmental conditions, where spray water and high exposure to dust might be challenging for accurate sensor performance. The membrane cover is attached to the sensor package by a double-faced adhesive tape, which is designed to stay on the package over the lifetime of the sensor. The DFN package is suitable for multiple reflow soldering cycles and is protected by an exclusive license for multiple patents.

    Due to minimal package volume and the membrane’s high water vapor permeability, the response time of the relative humidity and temperature signal is identical to the value achieved by the uncovered sensor. Although the membrane option provides perfect protection against water and dust ingress according to IP67, it does not in general prevent contamination from volatile chemicals. More details on contamination can be found in the document "Handling Instructions for Humidity Sensors". All SHT3x sensors can be ordered in tape and reel packaging; the reels are delivered in sealed antistatic ESD bags. Please find more details in the relevant datasheet.

    Sensirion Humidity Sensors SHT3x Filter-Membran

    Protective Cover

    The SHT3x protective cover is an optional polyimide foil directly attached to the top surface of the sensor. It covers the SHT3x’s complete sensing area and thus acts as a reliable shield against pollution during SMT assembly of the sensor and subsequent processes, such as conformal coating or potting. The protective cover is designed to withstand multiple reflow soldering cycles. To enable correct sensor operation, it must be removed after assembly.

    A flap on the cover extends over the outer dimensions of the sensor package on one side and is designed to allow the cover to be peeled off easily with tweezers. After peeling off, the sensor will operate as specified in the datasheet. All typical conformal coating procedures, such as brushing, spraying or potting, can be used as long as the protective cover is attached. The cover will effectively protect the sensor opening from direct exposure to these coatings and other possible pollutants during the production process. Please find more details in the relevant datasheet.

    Sensirion Humidity Sensors SHT3x Protective-Cover

    Development Kit: SHT31 Smart Gadget

    The SHT31 Smart Gadget is a simple reference design circuit board and development kit which demonstrates the outstanding performance and ease of use of Sensirion’s humidity and temperature sensors. The Smart Gadget not only shows humidity and temperature values on the display, but can also communicate with a bluetooth SMART capable device like a smartphone. For developers, full design resources of the SHT31 Smart Gadget are available on GitHub.

    Features:

    • SHT31 humidity sensor
    • LCD display for humidity, temperature and dew point in °C and °F
    • Bluetoogh Low Energy (BLE) connectivity to iOS and Android smartphones
    • iOS and Android apps available
    • Data logging capabilities
    • Complete hardware, firmware and software design resources available


    Order your SHT31 Smart Gadget Development Kit at our distributors.
    Find more detailed information about our SHT31 Smart Gadget here.

    Sensirion Humidity Sensors SHT3x Smart-Gadget

    Related Products

    Digital Humidity Sensor SHT4x (RH/T)

    With the industry-proven quality and reliability of Sensirion’s humidity and temperature sensors providing constant accuracy over a large measurement range, the SHT4x offers the best price-performance ratio.

    Digital Humidity Sensor SHT85 (RH/T)

    A highly accurate, digital pin-type relative humidity sensor for easy replaceability in a wide range of applications.

    Sensirion Humidity Sensors SF2 FilterCap

    SF2 Filter Cap

    Easily mountable solution to protect SHT2x and SHT3x humidity sensors. The SF2 filter cap protects against water, dust, soot, particles and other contaminants.

    Sensirion Humidity Sensors SHT3x Smart-Gadget

    SHT31 Smart Gadget Development Kit

    The Smart Gadget is a simple reference design circuit board and development kit which demonstrates the outstanding performance and ease of use of Sensirion’s humidity and temperature sensors.

    Technical Documents

    • Datasheet SHT3x analog
    • Datasheet SHT3x digital
    • RoHS, REACH and Hal-Free Declaration Humidity Sensors
    • Product Flyer Thermostats Humidity Sensors

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