Adafruit HTU21D-F Temperature Humidity Sensor Breakout Board - with or without Headers
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.
This 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. Available with or without headers pre-soldered — select your preferred option at checkout.
Key Features
- ±2% Typical Humidity Accuracy – Optimised for 5–95% RH operating range
- ±1°C Temperature Accuracy – Over -30 to 90°C range
- I²C Interface – Simple two-wire digital communication
- PTFE Filtered Sensor – Protects against dust and contaminants for reliable long-term readings
- 3.3V and 5V Compatible – On-board voltage regulation and I²C level shifting
- Assembly Options – Choose fully assembled (headers soldered) or with loose headers for custom builds
- Arduino Library and Tutorial – Easy setup with example code
Ideal For
- Indoor climate and weather monitoring
- HVAC and environmental control systems
- Greenhouse and grow room humidity tracking
- Beginner-friendly sensor projects
Package Contents
- 1× Adafruit HTU21D-F Breakout Board – Assembled and tested (with or without headers, depending on variant selected)
Resources
Product Information
Product Information
Shipping & Returns
Shipping & Returns
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.
This 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. Available with or without headers pre-soldered — select your preferred option at checkout.
Key Features
- ±2% Typical Humidity Accuracy – Optimised for 5–95% RH operating range
- ±1°C Temperature Accuracy – Over -30 to 90°C range
- I²C Interface – Simple two-wire digital communication
- PTFE Filtered Sensor – Protects against dust and contaminants for reliable long-term readings
- 3.3V and 5V Compatible – On-board voltage regulation and I²C level shifting
- Assembly Options – Choose fully assembled (headers soldered) or with loose headers for custom builds
- Arduino Library and Tutorial – Easy setup with example code
Ideal For
- Indoor climate and weather monitoring
- HVAC and environmental control systems
- Greenhouse and grow room humidity tracking
- Beginner-friendly sensor projects
Package Contents
- 1× Adafruit HTU21D-F Breakout Board – Assembled and tested (with or without headers, depending on variant selected)
