Simultaneous Determination of Droplet Size, pH Value and Concentration to Evaluate the Aging Behavior of Metalworking Fluids. - Patrick Wahrendorff; Mona Stefanakis; Julia C. Steinbach; Dominik Allnoch; Ralf Zuber; Ralf Kapfhammer; Marc Brecht; Andreas Kandelbauer; Karsten Rebner (Sensors, 2021)