Adafruit LTR390 UV Light Sensor - STEMMA QT / Qwiic

The LTR390 UV sensor offers an affordable solution for precise UVA and ambient light measurement, featuring a peak spectral response between 300 and 350nm. Perfect for monitoring sun exposure levels, this sensor informs when it’s time to cover up.

Unlike the Si1145, which only approximates UV Index, the LTR390 provides genuine UV spectral sensing. With a straightforward I2C interface, it seamlessly integrates with Arduino and Python microcontrollers, ensuring a hassle-free setup.

Housed on a breakout PCB in the Stemma QT form factor, it includes embedded support circuitry. Choose between breadboard usage or SparkFun qwiic-compatible connectors, supporting both 5V and 3.3V logic levels for versatile compatibility.