Adafruit AS7331 UV / UVA / UVB / UVC Sensor Breakout - STEMMA QT / Qwiic
The Adafruit AS7331 breakout is a high-precision spectral UV sensor module providing independent UVA, UVB, and UVC band measurements via I2C. Featuring STEMMA QT/Qwiic connectors, it offers plug-and-play compatibility with Arduino, Raspberry Pi, and other 3.3V/5V microcontroller platforms for environmental monitoring and safety applications.
Features
- Independent measurement of UVA (320–400 nm), UVB (280–320 nm), and UVC (200–280 nm) spectral bands.
- High sensitivity down to 2.38 nW/cm² per LSB with configurable gain and conversion settings.
- I2C interface with default address 0x74, configurable for multi-device setups (up to 4 sensors).
- STEMMA QT / Qwiic plug-and-play connectivity eliminates soldering for rapid prototyping.
- Integrated READY output pin and SYNC input for synchronized, multi-sensor data acquisition.
Out of stock
The AS7331 sensor utilizes a monolithic CMOS spectral sensing array with dedicated photodiodes for each UV band, enabling accurate separation and quantification of UVA, UVB, and UVC irradiance. This design prevents spectral crosstalk, providing reliable data for environmental analysis, material curing monitoring, and UV safety compliance. The onboard level shifter ensures compatibility with both 3.3V and 5V logic systems.
Communication is handled via a standard I2C interface, with programmable gain settings and conversion times allowing optimization for specific measurement ranges and sampling rates. The inclusion of READY and SYNC pins supports advanced timing control for synchronized data capture across multiple sensors, ideal for industrial or research-grade monitoring systems. Comprehensive Arduino and CircuitPython libraries streamline integration and data processing.
Additional Information
| Weight | 0.003 kg |
|---|---|
| Dimensions | 1.7 × 2.5 × 1 cm |
