{"title":"Adafruit HTU21D-F Temperature  Humidity Sensor Breakout Board","handle":"adafruit-htu21d-f-temperature-humidity-sensor-breakout-board","url":"/products/adafruit-htu21d-f-temperature-humidity-sensor-breakout-board","description":"The Adafruit HTU21D-F is an accurate I²C digital temperature and humidity sensor breakout board. With typical humidity accuracy of ±2% (optimised for 5–95% RH) and temperature accuracy of ±1°C across -30 to 90°C, it's a reliable and affordable choice for environmental monitoring projects.\n\nThis breakout uses the filtered version of the HTU21D (the \"F\"), which includes a PTFE filter to protect the sensor element from dust and contaminants. On-board 3.3V regulation and I²C level shifting make it compatible with both 3.3V and 5V microcontrollers — no external components needed.\n\nKey Features\n\n\n±2% Typical Humidity Accuracy – Optimised for 5–95% RH operating range\n\n±1°C Temperature Accuracy – Over -30 to 90°C range\n\nI²C Interface – Simple two-wire digital communication\n\nPTFE Filtered Sensor – Protects against dust and contaminants for reliable long-term readings\n\n3.3V and 5V Compatible – On-board voltage regulation and I²C level shifting\n\nArduino Library and Tutorial – Easy setup with example code\n\n\nIdeal For\n\nIndoor climate and weather monitoring\nHVAC and environmental control systems\nGreenhouse and grow room humidity tracking\nBeginner-friendly sensor projects\n\n\nPackage Contents\n\n1× Adafruit HTU21D-F Breakout Board – Fully assembled and tested with PTFE filter\n1× Header strip (unsoldered)\n\n\n\nNote: Light soldering is required to attach the included header strip for breadboard use.\n\n\nResources\n\nAdafruit HTU21D-F Learn Guide\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":13178,"title":"Default Title","sku":"AF-1899","price":20.76,"on_sale":false,"in_stock":true,"available_quantity":88,"option1":"Default Title"}]}