1870 – 1930
The companies of August Becker (Goettingen) and Ludwig Tesdorpf (Stuttgart) manufacture products completementary to Sartorius’ portfolio. Through the acquisition of these companies Sartorius adds microtomes and other instruments for microscopy, astronomical and geodetical devices as well as telescopes to the product line. The companies are integrated into the Sartorius firm under the new name "F. Sartorius, Vereinigte Werkstätten fuer wissenschaftliche Instrumente von F. Sartorius, A. Becker und Ludwig Tesdorpf".
Florence Sartorius involves his sons Wilhelm, Erich and Julius into the growing family enterprise (photo).
In 1916, Richard Zsigmondy together with Wilhelm Bachmann invents the membrane filter. The invention is patented under the publication number DE 329060 C. With this groundbreaking work in cooperation with the "Sartorius-Werke", Zsigmondy laid the foundation for Germany’s leading role in membrane technology.