Spesifications : - GY-8511 ML8511 UVB UV Rays Sensor Breakout Module Detector Analog Output. - Design compact: the ML8511 breakout is an easy to use ultraviolet light sensor. The MP8511 UV (ultraviolet) sensor works by outputing an analog signal in relation to the amount of UV light that's detected. This breakout can be very handy in creating devices that warn the user of sunburn or detect the UV index as it relates to weather conditions. - Compatible: this sensor detects 280 390 nm light most effectively. This is categorized as part of the UVB (burning rays) spectrum and most of the UVA (tanning rays) spectrum. It outputs a analog voltage that is linearly related to the measured UV intensity (mW/cm2).