TE Connectivity – Humidity and temperature sensor offers consistent, linear digital output


The HTU21D from TE Connectivity (TE) is a digital combined relative humidity and temperature sensor in a low-profile DFN package with a small 3mm x 3mm footprint.

The sensor provides linearised measurement outputs in a digital format over an I²C interface. TE’s polymer sensor materials combined with an optimised calibration slope and accurate offset give reliable, consistent performance even in the most demanding conditions. Every unit is individually calibrated and tested: a lot identification mark is printed on the sensor and an electronic identification code is stored on the chip for easy traceability.

The adjustable resolution of the HTU21D’s measurements can be configured by the system designer, from 8- up to 12-bit resolution for relative humidity, and from 12- to 14-bit resolution for temperature. The measurement range of the relative humidity sensor is 0-100%. The temperature sensor operates between -40°C and 125°C.


  • Low power consumption
  • Fast response time
  • Instantaneous desaturation after long periods in saturation phase


  • Heating, Ventilation and Air Conditioning (HVAC) equipment
  • Refrigerators and freezers
  • Dryers
  • Dishwashers
  • Printers