Adafruit Sensirion SHT40 Temperature Humidity Sensor - STEMMA QT / Qwiic
We have ✅ 3 available of the AF-4885 in our Sydney warehouse. An extra 100 units available with a short lead time.
The Adafruit Sensirion SHT40 is a high-accuracy temperature and humidity sensor featuring a true I2C interface for simple two-wire communication. Part of the fourth generation of Sensirion's acclaimed SHT sensor family, it delivers excellent measurement precision in a compact, easy-to-use breakout.
The breakout includes a voltage regulator and level shifting, making it compatible with both 3.3 V and 5 V systems. STEMMA QT / Qwiic connectors allow solderless hookup, and Arduino and CircuitPython libraries are available for quick integration.
Key Features
- Relative Humidity Accuracy – ±1.8% RH typical (25–75% RH)
- Temperature Accuracy – ±0.2 °C typical (0–75 °C)
- Operating Range – 0–100% RH, −40 to +125 °C; fully functional in condensing environments
- True I2C Interface – Address 0x44, fast mode plus with CRC checksum
- Ultra-Low Power – 0.4 µA average at 1 Hz measurement rate, 80 nA idle
- Variable Power Heater – Built-in heater for defogging and self-testing
- 3.3 V / 5 V Compatible – Onboard voltage regulator and level shifting
- STEMMA QT / Qwiic Connectors – Solderless I2C connection and daisy-chaining
- NIST Traceable – Calibrated with NIST traceability; JEDEC JESD47 qualified
Ideal For
- Environmental monitoring and weather stations
- HVAC and climate control systems
- Indoor air quality and comfort monitoring
- Data logging and scientific experiments
Package Contents
- 1× Adafruit Sensirion SHT40 Temperature & Humidity Sensor Breakout
- 1× Header strip (soldering required for breadboard use)
The Adafruit Sensirion SHT40 Temperature Humidity Sensor - STEMMA QT / Qwiic appears in the following collections:
