Sauter so 200k professional digital photometer light meter sauter so 200k p the sauter so 200k is a professional digital photometer light meter used to measure luminance in the field it is totally cosine corrected for the angular incidence of light p p this precision instrument is compact tough and easy to handle due to its construction the light sensitive component used in the meter is a very stable with a long life silicone diode p sauter so 200k light measuring instrument