Adafruit SHT45 Trinkey USB Temperature and Humidity Sensor with PTFE

The Adafruit SHT45 Trinkey with PTFE is a compact USB temperature and humidity sensor designed for easy connection to any computer or laptop with a USB A port. Featuring a high-accuracy Sensirion SHT45 sensor with a PTFE filter for protection, this device delivers reliable environmental readings with ±1.0% RH accuracy and ±0.1°C temperature accuracy.

Equipped with an ATSAMD21 microcontroller, the Trinkey supports CircuitPython and Arduino, enabling serial, MIDI, or HID communication over USB. Additional features include a NeoPixel LED, capacitive touchpad, and a reset button for bootloader mode.

• High-accuracy SHT45 Temperature and Humidity sensor with PTFE filter for environmental protection
• ATSAMD21E18 32-bit Cortex M0+ processor running at 48 MHz with 256KB Flash and 32KB RAM
• Native USB CDC ACM support for serial, MIDI, and HID interfaces compatible with Mac OS, Windows, and Linux
• Built-in RGB NeoPixel LED and capacitive touch input
• Compact, slim design that fits into USB A ports directly and is keychain friendly
• Pre-programmed to output temperature, humidity, touch sensor, and unique serial number via USB serial in CSV format
• Compatible with Arduino IDE and CircuitPython libraries for easy development

The integrated PTFE membrane offers over 99.99% filtration efficiency for particles 200nm and larger, protecting the sensor from dust and particles without affecting response time. The sensor operates across a wide range of humidity (0–100% RH) and temperature (−40 to 125 °C), and includes a sensor-specific calibration certificate per ISO standards.