{"title":"Adafruit HTU31 Temperature & Humidity Sensor Breakout Board","handle":"adafruit-htu31-temperature-humidity-sensor-breakout-board","url":"/products/adafruit-htu31-temperature-humidity-sensor-breakout-board","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.\n\nThe 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.\n\nKey Features\n\n\n±2% Typical Humidity Accuracy – At 20–100% RH, 0–70°C operating range\n\n±0.2°C Typical Temperature Accuracy – Over 0 to 100°C range\n\nI²C Interface with CRC Data Verification – More confident data reads compared to other I²C sensors\n\nOn-Board Heater – Controllable heater to evaporate condensation on the sensing element\n\nHardware Reset Pin – Reliable sensor reset without power cycling\n\nAddress-Select Pin – Run two HTU31 sensors on one I²C bus\n\nThermal-Isolation Cutout – Reduces heat interference from nearby components\n\nSTEMMA QT / Qwiic Connectors – Solderless I²C connection\n\n3.3V and 5V Compatible – On-board voltage regulation and level shifting\n\n\nIdeal For\n\nPrecision environmental monitoring\nIndoor climate and HVAC systems\nMulti-sensor networks with two sensors per I²C bus\nCondensation-prone environments (using the built-in heater)\n\n\nPackage Contents\n\n1× Adafruit HTU31 Breakout Board – Assembled and tested with STEMMA QT connectors\n1× Header strip (unsoldered)\n\n\n\nNote: STEMMA QT / Qwiic cable not included. Header strip requires light soldering if using with a breadboard. Temperature readings will not be accurate while the on-board heater is active.\n\n\nResources\n\nAdafruit HTU31 Learn Guide\nWhat is STEMMA QT?\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":2983,"title":"Default Title","sku":"AF-4832","price":14.05,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":100,"option1":"Default Title"}]}