This product is not currently available. For more information, including distributor inventory, please contact us.


The HTU21D sensor is a self-contained humidity and temperature sensor that is fully calibrated during manufacturing.  The sensor can operate from 1.5V to 3.6V, has selectable resolution, low battery detection, and checksum capability. The HTU21D has a low current stand-by mode for power-sensitive applications.


  • Measures relative humidity from 0% to 100%
  • Measures temperature from -40°C to 125°C
  • Humidity resolution selectable from 8 to 12 bits
  • Temperature resolution selectable from 11 to 14 bits
  • 0.14 µA sleep current
  • 500 µA operating current (during measurement only)
  • ±3% accuracy  


  • Covers full humidity range of 0 to 100% RH
  • Broad temperature range of -40°C to 125°C
  • Use output data to calculate absolute humidity and dew point
  • Quick recovery from condensation: 10 seconds
  • Fast response time to humidity changes: 5 seconds typical
  • Fully calibrated and interchangeable
  • Recovers fully from condensation
  • Fast digital conversion time: 14 mS typical  


  • 12-pin connector compatible with Digilent Pmod™
  • I2C interface
  • Secondary 12-pin connector allows daisy chain
  • FPGA bare metal drivers available for download
  • µC C code drivers available for download
  • Built-in heater to remove condensation
  • Available with PTFE environmental filter over the sensor


Please review product documents or contact us for the latest agency approval information.  

Product Type Features

  • Product Type  Peripheral Modules

  • Sensor Type  Humidity

Related Materials

Datasheets & Catalog Pages

Terms and Conditions

Please carefully read the disclaimer before using any of this data. Your use of this data constitutes your acceptance of the terms and conditions set forth below. If you do not agree to those terms and conditions, please click on the I Disagree link.

This information has been provided to your free of charge for your use but remains the sole property of TE Connectivity Corporation (''TE'') or SnapEDA,  Inc. or Ultra Librarian/EMA Design Automation, Inc. (collectively, "Company"). While Company has used reasonable efforts to ensure its accuracy, Company does not guarantee that it is error-free, not makes any other representation, warranty, or guarantee that the information is completely accurate or up-to-date. In many cases, the CAD data has been simplified to remove proprietary detail while maintaining critical interface geometric detail for use by customers. Company expressly disclaims all implied warranties regarding this information, including but not limited to any implied warranties or merchantability or fitness for a particular purpose.