Adafruit HTU31 Temperature & Humidity Sensor Breakout Board
The Adafruit HTU31 is a third-generation I²C temperature and humidity sensor from TE, offering improved accuracy and useful extras over its predecessor, the HTU21D. With typical humidity accuracy of ±2% (at 20–100% RH, 0–70°C) and temperature accuracy of ±0.2°C (0–100°C), it delivers reliable environmental readings for a wide range of projects.
The breakout comes in the STEMMA QT form factor with Qwiic-compatible I²C connectors on both sides for solderless daisy-chaining. On-board voltage regulation and level shifting support both 3.3V and 5V systems. An address-select pin allows two sensors on one I²C bus, and a thermal-isolation cutout minimises the effect of nearby circuitry on readings.
Key Features
- ±2% Typical Humidity Accuracy – At 20–100% RH, 0–70°C operating range
- ±0.2°C Typical Temperature Accuracy – Over 0 to 100°C range
- I²C Interface with CRC Data Verification – More confident data reads compared to other I²C sensors
- On-Board Heater – Controllable heater to evaporate condensation on the sensing element
- Hardware Reset Pin – Reliable sensor reset without power cycling
- Address-Select Pin – Run two HTU31 sensors on one I²C bus
- Thermal-Isolation Cutout – Reduces heat interference from nearby components
- STEMMA QT / Qwiic Connectors – Solderless I²C connection
- 3.3V and 5V Compatible – On-board voltage regulation and level shifting
Ideal For
- Precision environmental monitoring
- Indoor climate and HVAC systems
- Multi-sensor networks with two sensors per I²C bus
- Condensation-prone environments (using the built-in heater)
Package Contents
- 1× Adafruit HTU31 Breakout Board – Assembled and tested with STEMMA QT connectors
- 1× Header strip (unsoldered)
Resources
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Adafruit HTU31 is a third-generation I²C temperature and humidity sensor from TE, offering improved accuracy and useful extras over its predecessor, the HTU21D. With typical humidity accuracy of ±2% (at 20–100% RH, 0–70°C) and temperature accuracy of ±0.2°C (0–100°C), it delivers reliable environmental readings for a wide range of projects.
The breakout comes in the STEMMA QT form factor with Qwiic-compatible I²C connectors on both sides for solderless daisy-chaining. On-board voltage regulation and level shifting support both 3.3V and 5V systems. An address-select pin allows two sensors on one I²C bus, and a thermal-isolation cutout minimises the effect of nearby circuitry on readings.
Key Features
- ±2% Typical Humidity Accuracy – At 20–100% RH, 0–70°C operating range
- ±0.2°C Typical Temperature Accuracy – Over 0 to 100°C range
- I²C Interface with CRC Data Verification – More confident data reads compared to other I²C sensors
- On-Board Heater – Controllable heater to evaporate condensation on the sensing element
- Hardware Reset Pin – Reliable sensor reset without power cycling
- Address-Select Pin – Run two HTU31 sensors on one I²C bus
- Thermal-Isolation Cutout – Reduces heat interference from nearby components
- STEMMA QT / Qwiic Connectors – Solderless I²C connection
- 3.3V and 5V Compatible – On-board voltage regulation and level shifting
Ideal For
- Precision environmental monitoring
- Indoor climate and HVAC systems
- Multi-sensor networks with two sensors per I²C bus
- Condensation-prone environments (using the built-in heater)
Package Contents
- 1× Adafruit HTU31 Breakout Board – Assembled and tested with STEMMA QT connectors
- 1× Header strip (unsoldered)
