Zetatrac brings together both new and existing technologies to provide a unique Zeta Potential measurement capability. Dynamic light scattering concepts and instrumentation are joined with recent developments in the interaction of random Brownian motion with driven electric field motion of particle suspensions. Zetatrac technology:

• Utilizes Dynamic Light Scattering to determine particle motion in an electric field
• Utilizes Interference Referencing to convert scattered light signal to Frequency Power Spectrum representative of particle motion
• Utilizes proven backscatter optical probe technology to provide a concentration range from PPM to %
• Utilizes recently developed Modulated Power Spectrum analysis of combined Brownian Motion and Electric Field Driven Motion to determine Zeta Potential

The optical measurement of Zeta Potential involves extracting information about particle motion in an electric field from light scattered by suspended particles. The current technologies of dynamic light scattering measure the random Brownian motion of suspended particles and relate the distribution of particle velocities or positions to particle size distribution. Extending this analysis to particles in an electric field provides the means of determining Zeta Potential.

• The Zetatrac instrument is built upon Microtrac’s robust and time tested dynamic light scattering technology.
• The measurement probe contains optical elements which are fixed and frozen - no adjustments necessary.
• The small footprint package is configured for ease of use with a built in Teflon sample cell which provides for either load & run or flow through modes of operation.
• Operating at high frequency Zetatrac measures the interaction between field motion and Brownian motion while avoiding fluid flow artifacts to particle motion, electrochemical degradation of surfaces and measurement errors due to electrode polarization.
• Zetatrac provides simultaneous Zeta Potential & Particle Size measurement over the widest possible concentration range.