Digital Humidity Sensors (RH/T)
Sensirion is the world’s leading manufacturer of digital relative humidity sensors. By pioneering digital humidity sensors 20 years ago, Sensirion has defined an industry standard with the SHTxx series. Best-in-class products, unmatched experience, and excellent application support make Sensirion the no. 1 partner for humidity sensing.
Next generation RH/T sensor platform with multiple accuracy and interface options.
- 1.08 - 3.6 V supply voltage
- I2C interface
- Average current: 0.4 µA (at meas. rate 1 Hz)
Established RH/T sensor platform with multiple accuracy and interface options.
- 2.15 - 5.5 V supply voltage
- I2C and analog interface options
- Various protection options (protective cover, filter membrane)
The SHT40 builds on a completely new and optimized CMOSens® chip that offers reduced power consumption and improved accuracy specifications. With the extended supply voltage range from 1.08 V to 3.6 V, it’s the perfect fit for mobile and battery-driven applications. The exceptionally small size in a robust DFN housing enables integration into challenging designs while meeting the highest reliability demands, as demonstrated by the JEDEC JESD47 qualification.
Get an Overview of Sensirion's Humidity Sensors
T Accuracy (°C)
|VDD Range (V)||Interface||Package Size|
|Protective Options||Automotive Version|
|1.08 to 3.6||I2C||1.5 x 1.5 x 0.5||Available in 2021||Available in 2022||Download|
|2.15 to 5.5||I2C, analog voltage||2.5 x 2.5 x 0.9||-||yes||Digital|
|2.15 to 5.5||I2C, analog voltage||2.5 x 2.5 x 0.9||Protective Cover|
|2.15 to 5.5||I2C||2.5 x 2.5 x 0.9||Filter Membrane||yes||Download|
|1.62 to 1.98||I2C||1.3 x 0.7 x 0.5||-||no||Download|
|1.62 to 3.6||I2C||2 x 2 x 0.75||-||no||Download|
|1.62 to 1.98||I2C||2 x 2 x 0.75||-||no||Download|
@20 to 50°C
|2.15 to 5.5||I2C||17.8 x 4.9 x 2.1||-||no||Download|
Test Our Environmental Sensors with Sensirion's Evaluation Kit
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.
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.
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.
- 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
What We Offer
Expert First Contact
- Specialized and experienced sales force
- Worldwide presence with a global distribution network
Fast And Easy Product Evaluation
- Comprehensive product portfolio
- Easy-to-use evaluation kits for effortless humidiy and temperature measurement during sensor evaluation
- Wide range of technical documents - data sheets, sample code, application notes
- Assistance with the integration of SHTxx sensors into your application
- Proven best practices to ensure that your production concept accommodates the requirements of SHTxx sensors
- Reliable and flexible production
- Sustainable product innovation roadmap to meet your future needs
Main Use Drivers for SHTxx
Health and Comfort
Humidity and temperature significantly affect personal health and comfort; thus, the measurement of humidity and temperature in this context can improve personal well-being. Applications include humidifiers, baby monitors, and home care respiratory equipment.
Quality and Reliability
Humidity and temperature influence the quality and reliability of numerous processes. Measuring humidity and temperature can help improve the quality and reliability of such processes. Applications include data logging in the logistics of sensitive goods, humidity sensing in printers, and water intrusion detection in critical electronic devices.
Measurement of humidity and temperature can help optimize processes and thus save energy and costs. Applications include automotive engine control, smart condensation control for refrigerators, and optimization of A/C cooling cycles.
Humidity and temperature may influence the safety of a system, a process, or a person; thus, humidity and temperature measurement can help ensure their safety. Applications include automotive windshield anti-fogging, water intrusion detection in battery packs, and building supervision for insurance purposes.
On our developer website you can find many application ideas using humidity and temperature sensors. Furthermore, there are various tutorials for different platforms available. Here are some examples:
AirTouch® is an input method for touchless interaction with a device. Due to the very high humidity of human breath, it can be detected if a user is blowing onto a device and thus trigger an activity.
Smart Speakers offer a lot of useful and fun features. By implementing Sensirion's environmental sensors, the device learns about the ambience and can provide information on indoor air quality, ambient temperature and humidity.
Click here to visit our developer website and kick-start your own projects.