Adafruit SI1145 Digital UV Index / IR / Visible Light Sensor

Remember when you were at the pool as a kid and declared you had enough sunscreen, only to be lathered up again? Now, say goodbye to those days with the SI1145 UV Index Sensor. Equipped with a calibrated algorithm, it calculates the UV Index without a direct UV sensor, matching the accuracy of news reports as verified by our tests.

This digital sensor communicates over I2C, compatible with nearly all microcontrollers. It offers elements for visible and IR sensing, ideal for diverse light measurement needs. For more precise Lux measurements, consider the TSL2561 model.

The sensor supports proximity sensing when paired with an IR LED. It comes on a ready-to-use PCB with level shifting and regulation circuitry, perfect for safe use with 3V or 5V systems. All orders include a pre-assembled and tested PCB breakout and header, requiring quick soldering for setup.

Our Arduino library and tutorial guide you through setup, delivering UV index readings in less than 10 minutes. Embrace innovation and measure light conditions effortlessly with this versatile sensor.