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The HTU31 is one of the smallest and most accurate humidity sensors on the market. Our precision engineering and 20+ years of experience in humidity and temperature combination sensors, enables us to provide sustained performance even when exposed to extreme temperature (-40° to 125°C) and humidity environments (0%-100%).

The HTU31 humidity sensor includes both digital (D) and analog (V) versions, and combine multiple functions and various interfaces (I2C, analog, voltage output) with an application-friendly operating voltage range (3.3-5.5V with 5V typical) and a small footprint of 2.5 x 2.5 x 0.9mm. The HTU31 humidity and temperature sensor is available in small and large volumes to meet the ever-changing demands of our customers.



  • High reliability and environmental robustness
  • Excellent humidity stability with less than 0.1%RH/y long term drift
  • 3 second humidity response time, one of the fastest responses in the market.
  • Full interchangeability with no calibration required in standard conditions
  • Quick recovery after long periods in saturation phase
  • Compatible with automatic assembly process
  • Reflow solderable
  • Individual marking for compliance to stringent traceability requirements
  • Lead free sensor
  • Low power consumption
  • No sensitivity of reflow process in humidity measurement.


  1. Smarter With Sensors | HTU31 Humidity and Temperature Sensor (English)

In this episode of our SMARTER WITH SENSORS video series, we will introduce the HTU31 humidity and temperature sensor. Watch this short video to learn about the range of applications where the HTU31 is used, technical details, and how humidity sensing works and more.

  1. HTU31 Humidity & Temperature Combination Sensor

TE Connectivity’s HTU31 Humidity & Temperature Sensor is one of the smallest and most accurate humidity sensors on the market. The HTU31 provides fast response time, precision measurement, low hysteresis and sustained performance, even in the harshest of environments. Watch this video to learn more.

HTU31D click board


Humidity and Temperature Sensor Solution Guide Solution Guide
HTU31 Humidity and Temperature Sensor  Infographic
Sensors in Sleep Apnea and Sleep Study Equipment White Paper
The Importance of Controlling Humidity in Residential and Commercial Environments White Paper
Making HVAC Systems More Efficient and Reliable with Sensors White Paper


Frequently Asked Questions

Q: What is the lag in response time or how long does it take for the sensor to return to its normal operating state? 
A: The response time and recovery time after condensation is 3 seconds.

Q: What is the measurement range for the humidity sensor? 
A: Humidity measurement range is 0 to 100% relative humidity


Q: What is the measurement range for the temperature sensing? 
A: Temperature measurement range is -40°C to +125°C.

Q: What is the response time? 
A: Response time is 3 seconds for humidity and 10 seconds for temperature


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

Product Type Features

  • Humidity Sensor Component Product Type  RHT

  • Humidity Sensor Component Sensor Type  Analog, Digital

  • Humidity Accuracy (%) ± 2

Electrical Characteristics

  • Supply Voltage (Peak) (V) 5.5

  • Current Consumption (mA) 1, 161

  • ESD Robustness (kV) ± 8

Usage Conditions

  • Humidity Operating Range (%RH) 0 – 100

  • Operating Temperature Range  -40 – 257 °C [ -40 – 257 °F ]

  • Temperature Accuracy (°C) ± .2


  • Response Time (seconds) 3

Reference Number

  • TE Internal Number CAT-HSC0007

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