KWS-1 is a very versatile SANS instrument able to investigate inhomogeneities in the materials up to a dimension of about 1000 nm. KWS-1 is equipped with a large variety of sample environment that are used in-situ during the measurements to reproduce the proper conditions neede for the experiment. Detailed technical and experimental information is available at the web page of the instrument https://mlz-garching.de/kws-1.