Adafruit Sensirion SHT45 Precision Temperature & Humidity Sensor with PTFE

The Adafruit Sensirion SHT45 is a precision temperature and humidity sensor with an integrated PTFE filter for protection, providing reliable and accurate environmental sensing. It features a true I2C interface compatible with 3.3V and 5V systems, enabling easy connection to microcontrollers and single-board computers.

This sensor offers a ±1.0% typical relative humidity accuracy from 25 to 75% and ±0.1°C typical temperature accuracy from 0 to 75 °C. The PTFE membrane filter enhances durability and protects against particles and liquid intrusion, making it suitable for harsh conditions and operating according to IP67 standards.

The breakout board includes supporting circuitry such as pull-up resistors and capacitors, and STEMMA QT / Qwiic connectors for solderless I2C connections. The package includes one breakout board and a small piece of header for easy prototyping.

• PTFE filter membrane for protection and extended sensor longevity
• Accuracy: ±1.0% RH, ±0.1°C temperature
• Operating range: 0…100% RH, −40…125 °C
• True I2C interface with default address 0x44
• Compatible with 3.3V to 5V logic levels
• Low average current consumption: 0.4 µA active, 80 nA idle (excl. regulator quiescent)
• Fully functional in condensing environments
• Includes ISO 17025:2017 calibrated sensor-specific certificate
• STEMMA QT / Qwiic connectors for easy plug-and-play use

Dimensions: 25.5mm x 17.7mm x 4.8mm; Weight: 1.7g

Compatible with Arduino and CircuitPython using available libraries for seamless integration.