• Megatrends

    • Energy transition

      The energy transition is key to a sustainable future – driven by innovative technologies and smart solutions

    • Artificial intelligence

      From measurement to smart decisions

    • Emission reduction

      Making emissions visible, measurable, and manageable

    • Health and well-being

      Smarter sensing for cleaner, safer, and more comfortable living

  • Applications

      • Smart inhalers
      • Metabolic breath analysis
      • Subcutaneous drug delivery
      • Mechanical ventilators
      • Infusion
      • Anesthesia machines
      • CPAP devices
      • Heart-lung machines
      • Nitric oxide therapy
      • Urine flow measurement
      • Battery energy storage systems
      • Surface mount technology
      • Clean cooking
      • Combustion control
      • Substrate storage and handling
      • Gas analyzers
      • Gas meters
      • Humidity in oil
      • Photoresist coating and dosing
      • Thin-film deposition and etching
      • Gas purging
      • Transport of pharmaceutical goods
      • Transport of perishable goods
      • Bioreactors
      • Condition monitoring & instrument diagnostics
      • Custom manifold solutions
      • DNA sequencing
      • Flow cytometry
      • Gas chromatography
      • Liquid chromatography
      • Mass spectrometry
      • Microfluidics
      • Thermal analysis
      • Refrigerators
      • Demand-controlled ventilators
      • Room sensors
      • VAV controllers
      • Filter monitoring
      • Refrigerant leakage detection
      • Air conditioners
      • Air purifiers
      • Thermostats
      • Indoor air quality monitors
      • Smart speakers
      • Vape detectors
      • Sleep quality
      • Metabolic breath analysis
      • Air intake
      • Antifogging
      • Brake-by-wire systems
      • Humanoid robots
      • H2 monitoring in fuel cells
      • LiDAR systems
      • Safety of electric vehicles
      • Steer-by-wire systems
  • Products

      • Find your product
      • Humidity
      • Temperature
      • NOx & VOC
      • Formaldehyde
      • CO₂
      • Particulate matter
      • Refrigerants
      • Liquid flow
      • Differential pressure
      • Gas flow
      • Mass flow controllers
      • Gas metering solutions
      • Gas analyzers
      • Evaluation kits
      • ControlCenter
      • SEK-SensorBridge
      • Humidity/temperature
      • VOCs/NOx
      • Formaldehyde
      • CO₂
      • Particulate matter
      • Liquid flow
      • Differential pressure
      • Gas flow sensors
      • Mass flow controllers
      • Hydrogen detection
      • Download center
      • Evaluation kits
      • Demonstrators and apps
      • FAQ
      • Technical support
      • Distributors
      • GitHub
      • Developer website
      • Distributors' inventory
      • Distributors
      • Representatives
      • Partner access
      • Commercial contact
      • Customized sensors
      • Development
  • Career

      • Find your dream position
      • Working at Sensirion
      • Our locations
      • Our teams
      • Our entities
      • Professionals
      • Graduates
      • Students
      • Apprentices
      • News
      • Events
      • Newsletter
      • WhatsApp news
    • Contact our P&C Team
  • Company

      • Company profile
      • Locations
      • Contact
      • Sustainability compliance
      • Energy efficency
      • Improving health
      • Ensuring safety and comfort
      • Technology
      • Encouraging innovation
      • Quality and reliability
      • All news
      • Press releases & news
      • Specialist articles
      • Events
      • Webinars
      • Newsletter
      • At a glance
      • Share information
      • Ad-hoc news
      • Financial newsletter
      • Events
      • Results and reports
      • Annual general meeting
      • Corporate governance
      • Sustainability
    • Growth is our aspiration, our global goal.

      Driving strategic growth areas

Directly to

  • Product catalog
  • Support
  • Technical downloads
  • Newsroom
  • Work at Sensirion

Sensirion

  • Developers platform
  • Sensirion Automotive Solutions
  • Sensirion Connected Solutions
  • Qmicro by Sensirion

Contact us

  • General Request
  • Commercial Support Request
  • Technical Support Request
  • Newsletter Registration

Legal notice© Sensirion AG

  • All products
  • Humidity sensors
  • SHT4x

SHT40-AD1P-R2

New

±1.8% / max. ±3.5% RH digital humidity and temperature sensor with protective cover

The SHT40-AD1P-R2 is a 4th-generation digital humidity and temperature sensor, offering accuracy of ±1.8%RH (max. ±3.5%) and ±0.2°C. Equipped with a standard I2C interface and a fixed 0x44 I2C address, this sensor ensures seamless integration into various applications. Its innovative design includes a removable protective cover as well as DFN housing, enhancing durability and flexibility for demanding environments. Ideal for high-volume applications, the SHT40-AD1P-R2 combines a compact form factor, reliability, and innovative sensing technology.

See inventoryDistributor listContact sales

Specification

Humidity
Typ. relative humidity accuracy
1.8
1.8%RH
Operating relative humidity range
0 - 100
0 - 100%RH
Response time (τ63%)
4
4s
Protective option
Protective cover
Protective cover
Temperature
Typ. temperature accuracy
0.2

Downloads

Datasheet SHT4x
  • 04/2025•
  • PDF•
  • 915.1 KB
Datasheet04/2025PDF915.1 KB
Creep mitigation SHT4xX
  • 05/2022•
  • PDF•
  • 277.8 KB
Application note05/2022PDF277.8 KB
Handling instructions SHT
  • 06/2025•
  • PDF•
  • 470.2 KB
Application note06/2025PDF470.2 KB
Heater decontamination SHT4xX
  • 02/2024•
  • PDF•
  • 386.5 KB
Application note02/2024PDF386.5 KB
Humidity at a glance
  • 05/2025•
  • PDF•
  • 204.6 KB
Application note05/2025PDF204.6 KB
Introduction to humidity
  • 08/2009•
  • PDF•
  • 224.9 KB
Application note08/2009PDF224.9 KB
Specification statement and testing humidity sensors
  • 04/2021•
  • PDF•
  • 306.8 KB
Application note04/2021PDF306.8 KB
Testing at ambient conditions SHT
  • 10/2022•
  • PDF•
  • 443.0 KB
Application note10/2022PDF443.0 KB
Contamination guide for humidity and temperature sensors
  • 10/2024•
  • PDF•
  • 849.1 KB
Guide10/2024PDF849.1 KB
Contamination guide for humidity and temperature sensors Chinese
  • 11/2024•
  • PDF•
  • 2.9 MB
Guide11/2024PDF2.9 MB
Design-in guide SHT/STS
  • 04/2024•
  • PDF•
  • 822.1 KB
Guide04/2024PDF822.1 KB
Design-in guide SHT/STS Chinese
  • 06/2024•
  • PDF•
  • 1.2 MB
Guide06/2024PDF1.2 MB
Transition guide for SHT3x to SHT4x
  • 05/2024•
  • PDF•
  • 411.2 KB
Guide05/2024PDF411.2 KB
Transition guide for SHTC1 to SHT4x
  • 12/2023•
  • PDF•
  • 387.3 KB
Guide12/2023PDF387.3 KB
Transition guide for SHTC3 to SHT4x
  • 12/2023•
  • PDF•
  • 388.1 KB
Guide12/2023PDF388.1 KB
Transition guide for SHTW2 to SHT4x
  • 08/2020•
  • PDF•
  • 347.9 KB
Guide08/2020PDF347.9 KB
Embedded drivers humidity
  • Link•
SoftwareLink
SEK-ControlCenter (all devices)
  • Link•
SoftwareLink
Calibration certification SHT/STS
  • 08/2021•
  • PDF•
  • 110.4 KB
Certificate08/2021PDF110.4 KB
REACH and RoHS declaration SHT/STS
  • 12/2025•
  • PDF•
  • 107.3 KB
Certificate12/2025PDF107.3 KB
Humidity product flyer
  • 10/2024•
  • PDF•
  • 1.0 MB
Flyer10/2024PDF1.0 MB
Humidity product flyer Chinese
  • 03/2025•
  • PDF•
  • 933.3 KB
Flyer03/2025PDF933.3 KB
Humidity product flyer Japanese
  • 05/2025•
  • PDF•
  • 3.7 MB
Flyer05/2025PDF3.7 MB
Indoor air quality brochure
  • 11/2025•
  • PDF•
  • 7.0 MB
Flyer11/2025PDF7.0 MB
0.2
°C
Response time (τ63%)
2
2s
Generic
Supply voltage
1.08 - 3.6
1.08 - 3.6V
Average supply current
0.4
0.4uA
Operating temperature range [°C]
-40 - 125
-40 - 125°C
Interfaces
I²C
I²C
Size (LxWxH)
1.5 x 1.5 x 0.5
1.5 x 1.5 x 0.5mm

Sensor evaluation

Buy the following products to evaluate this sensor

NameDescriptionSeriesCategory
SEK-SHT40-AD1FEvaluation kit for SHT40 humidity sensor with filter membraneSEK-SHTxxHumidity sensors

SEK-SHT40-AD1F

Evaluation kit for SHT40 humidity sensor with filter membrane

SEK-SHTxx

Humidity sensors

Download the respective viewer software to start measuring

Go to download center

Start testing our sensors fast and easy with the evaluation kits

How to get started

Smart sensors for your application

Sensirion's sensor solutions are used in a wide range of applications and markets. Our reliable environmental and flow sensors improve energy efficiency, increase health and ensure safety and comfort.

  • Home
  • Products
  • Product catalog
  • SHT40-AD1P-R2

Latest Humidity sensors

Explore
±1.8% / max. ±2.5% RH digital humidity and temperature sensor with protective cover
New

SHT41-AD1P-R2

±1.8% / max. ±2.5% RH digital humidity and temperature sensor with protective cover

  • Humidity sensors
ASIL-A safety element out of context humidity sensor
Upcoming

SHT41A-AWSB

ASIL-A safety element out of context humidity sensor

  • Humidity sensors
±2% Digital humidity and temperature sensor / 0x45 I2C Output
New

SHT40I-BD1B

±2% Digital humidity and temperature sensor / 0x45 I2C Output

  • Humidity sensors
±1.8% / max. ±3.5% RH Digital humidity & temp. sensor / 0x46 I2C Output
New

SHT40-CD1B

±1.8% / max. ±3.5% RH Digital humidity & temp. sensor / 0x46 I2C Output

  • Humidity sensors
±1.8% / max. ±3.5% RH Digital humidity & temp. sensor / 0x45 I2C Output
New

SHT40-BD1B

±1.8% / max. ±3.5% RH Digital humidity & temp. sensor / 0x45 I2C Output

  • Humidity sensors
±2% humidity sensor for automotive applications / I2C interface
New

SHT41A-BD1B

±2% humidity sensor for automotive applications / I2C interface

  • Humidity sensors
±2% humidity sensor for automotive applications / PWM interface
New

SHT41A-FD1B

±2% humidity sensor for automotive applications / PWM interface

  • Humidity sensors