SurPASS 3 is the entry-level instrument for routine analysis of macroscopic solid surfaces, enabling fully automated zeta potential measurements at real-life conditions. SurPASS 3 performs solid/liquid interface analysis directly on real samples under process or environmental conditions. The zeta potential is displayed in less than two minutes, based on the measurement of streaming potential and streaming current. The instrument delivers high-quality zeta potential values down to a few millivolts. Short intervals in data recording ensure enhanced measurement sensitivity. Simultaneous measurement of pH, conductivity, and temperature completes the surface zeta potential analysis.