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Electrokinetic Analyzer for Solid Surface Analysis: SurPASS™ 3

SurPASS™ 3 is a high-end electrokinetic analyzer featuring fully automated zeta potential analysis of macroscopic solids in real-life conditions. SurPASS™ 3 employs the classic streaming potential and streaming current method for a direct analysis of the surface zeta potential. The zeta potential is related to the surface charge at a solid/liquid interface and is a key parameter for understanding surface properties and developing new specialized materials. Automatic pH scans and time-dependent recording of adsorption kinetics allow for a deep understanding of the surface chemistry.

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Key Features

State-of-the-art solid surface analysis

  • Direct solid/liquid interface analysis by means of streaming potential and streaming current measurement
  • Full range of zeta potential down to a few millivolts
  • Instant access to information on surface charge

From tiny particles to large wafers

  • Elaborate measuring cells for any sample geometry
  • Cylindrical Cell for powders (min. particle size 25 µm ) and fibers
  • Clamping Cell for non-destructive measurement of planar solids
  • Adjustable Gap Cell for small samples (20 mm x 10 mm, 14 mm dia., 15 mm dia.)
  • Sample-specific measuring cells for contact lenses, hollow fiber membranes, and flexible tubings

Higher sample throughput

  • Quick exchange of measuring cells, ‘plug-in and go’ functionality
  • Recording of measuring data at >5 Hz
  • Zeta potential measurement in <2 minutes

Fully automated measurements

  • Real-time visualization of key parameters
  • Automated pH scans and detection of the isoelectric point
  • Recording of liquid-on-solid surface adsorption kinetics

Technical Specifications

Measuring range
Streaming potential ± 2000 mV ± (0.2 % + 4 μV)
Streaming current ± 2 mA ± (0.2 % + 1 pA)
Cell resistance 5 Ω to 20 MΩ ± (2 % + 0.5 Ω)
Pressure measurement 3500 mbar ± (0.2 % + 0.5 mbar)
external pressure supply (compressed N2) required for differential pressure > 1500 mbar
pH value pH 2 to pH 12
Conductivity 0.1 to 1000 mS/m
Temperature 20 °C to 40 °C
Sample size requirements
Clamping Cell Min. 35 mm x 15 mm or min. 17 mm in diameter
Max. thickness: 40 mm
Cylindrical Cell Particle size >25 μm
Adjustable Gap Cell 20 mm x 10 mm
Max. thickness: 2 mm
Adjustable Gap Cell for Disks Diameter: 14 mm or 15 mm
Max. thickness: 2 mm
Technical requirements
Mains supply AC 115 to 230 V, 50 to 60 Hz, 200 VA
Dimensions 600 mm x 432 mm x 245 mm (D x W x H)
Footprint: 612 mm x 536 mm (D x W)
Clearance: 360 mm
Weight 26 kg
Software requirements
  • Microsoft Windows® 7 32/64 bit with SP1 or later is required. Windows 7 Starter is not supported.
    Microsoft Windows® 8 32/64 bit
    Microsoft Windows® Server 2008/2008 R2 32/64 bit with Service Pack 2 or higher is required for Windows Server 2008
    Microsoft Windows® 10 32/64 bit
  • Intel® Core™ i3 CPU
  • 4 GB RAM (depends on operating system)
  • 20 GB free disk space
  • 1 free USB port
  • Screen resolution of at least 1024 x 768 at True Color (32 bit)

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