Before I buy a 20 euro sensor; I would like to know if this sensor is what I need to measure the UV Index.
Have you looked at the datasheet - http://www.produktinfo.conrad.com/datenblaetter/150000-174999/165185-da-01-ml-UV_PHOTODIODE_SG01S_de_en.pdf
The sensor is sensitive in a certain range but as far as I understand you cannot deduce if the sensor was hit by UVA or UVB or UVC.
The datasheet does include a schematic how to connect the sensor, but it is unclear for me if it will connect to a analogIN (a multimeter would help)
If I google for UV sensors (e.g. digikey) I get far more expensive sensors (500+ €) so the price seems not to bad.
might be cheaper when ordered in US? as it is made in the US...
NO experience with the sensor itself...