GUVA-S12SD UV Intensity Sensor Module

UV light sits outside the visible spectrum, so measuring it needs a photodiode specifically responsive to that shorter wavelength range rather than a standard visible-light sensor - this module uses a Schottky-type photosensitive diode tuned to the 240-370nm band, covering the UVA and part of the UVB range relevant to sunlight exposure monitoring. Output current scales with UV intensity, giving a genuinely quantitative reading rather than a simple UV-present/absent flag.

A wide 130-degree field of view is a deliberate design choice for outdoor ambient monitoring - a narrow-angle sensor would only catch UV from whatever it's pointed directly at, while this wide angle captures a more representative reading of overall ambient UV exposure from the sky. Microamp-level operating current keeps it viable for battery-powered outdoor weather station deployments running for extended periods.

Common uses are solar UV index monitoring for weather stations, sun-exposure tracking devices, and greenhouse or agricultural UV monitoring where excessive or insufficient UV exposure affects plant health.