The DT-300 ZetaPhor ElectroAcoustic Spectrometer measures zeta potential of concentrated colloids, suspensions and emulsions with a convenient probe-type sensor. No special cell is required, so the sensor can be used with existing sample containers. Optional titration systems can provide a correlation of zeta potential vs. pH or surfactant addition. The DT-300 offers unparalleled analytical capabilities for advanced dispersion characterization of even complex sample types at process concentrations.