SurPASS 3: An Electrokinetic Analyzer for Solid Surface Analysis

The SurPASS 3 series from Anton Paar includes electrokinetic analyzers for solid surface analysis with a completely automated zeta potential analysis of macroscopic solids subjecting to real-life situations.

The instrument makes use of the classic streaming potential and streaming current method to ensure direct analysis of the surface zeta potential. The zeta potential is associated with the surface charge at a solid or liquid interface and is an important characteristic for learning the surface properties and designing new specialized materials.


  • Has a completely automated zeta potential analysis on macroscopic solids
  • Facilitates a time-reliable recording of liquid-on-solid adsorption kinetics
  • The system has been designed to make automatic detection of the isoelectric point
  • High-end electrokinetic analyzer is capable of performing solid surface analysis

SurPASS 3-Eco

  • Delivers single-point zeta potential results in less than 2 minutes
  • The system is an entry-level electrokinetic analyzer developed for regular surface analysis
  • Available with upgrade options for a future-proof investment

Key Features

Solid Surface Charge Analysis Made Easy

The SurPASS 3 series enables direct analysis of the zeta potential at the liquid or solid interface through its streaming potential and streaming current measurement.

It provides access to the complete levels of zeta potential of technical materials ranging down to a few millivolts at unmatched reproducibility and dependability. The system offers real-time access to data on a surface charge with no requirement for expert knowledge or complicated assessment.

SurPASS 3: An Electrokinetic Analyzer for Solid Surface Analysis

Image Credit: Anton Paar GmbH

Measuring Solutions from Tiny Particles to Large Wafers

The broad range of SurPASS 3 measuring cells is a series of elaborate measuring cells that can house samples of any geometry varying from powder and fibers to planar solids.

The features include sample-specific measuring cells for contact lenses, flexible tubings, hollow fiber membranes, syringes and vials that open up surface charge analysis on samples having complicated geometries.

The “plug in and start” feature permits a faster exchange of measuring cells. The installed software is capable of automatically recognizing the measuring cells and shows the zeta potential.

SurPASS 3: An Electrokinetic Analyzer for Solid Surface Analysis

Image Credit: Anton Paar GmbH

Fully Automated Measurements in less than Two Minutes

The intuitive SurPASS 3 software helps direct the users via the measurements and shows all important findings instantly. The SurPASS 3 series offers zeta potential results within 2 minutes for high sample throughput.

The SurPASS 3 enables users to understand pH dependences of zeta potential in a completely automated procedure and exposes the isoelectric point for a better insight into the sample’s chemistry. Liquid-on-solid surface adsorption kinetics can be traced instantly on model surfaces and the actual sample of the users.

SurPASS 3: An Electrokinetic Analyzer for Solid Surface Analysis

Image Credit: Anton Paar GmbH

Modular Setup Tailored to User Needs

The SurPASS 3 series is as adaptable as the users’ application. The system includes dedicated solutions for membrane application, cosmetics, detergents, biomaterials and semiconductors. The instruments have no limitation for any kind of materials, for example, porous materials like membranes, or nonporous films and plates, particles >25 μm, fibers, granular materials or materials which swell strongly or are conductive.

The instrument’s modular setup and measuring allow the user to easily expand the zeta potential analysis to envelop future requirements.

SurPASS 3: An Electrokinetic Analyzer for Solid Surface Analysis

Image Credit: Anton Paar GmbH

Technical Specifications

Source: Anton Paar GmbH

  SurPASS 3 SurPASS 3 Eco
Measuring range
Streaming potential ±2000 mV ± (0.2% + 4 μV)
±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) is required for differential pressure >1200 mbar
1200 mbar ± (0.2% + 0.5 mbar)
pH value pH 2 to pH 12
Conductivity 0.1 mS/m to 1000 mS/m
Temperature 20 °C to 40 °C
Temperature control option is available
Sample size requirements
Porous films,
foils, or plates
Rectangular-shaped: 20 mm x 10 mm (max. thickness: 2 mm )
Disk-shaped: 14 mm or 15 mm in diameter (max. thickness: 2 mm)
films, foils,
or plates
Rectangular-shaped: 20 mm x 10 mm (max. thickness: 2 mm) or
min. 35 mm x 15 mm (max. thickness: 40 mm)

Disk-shaped: 14 mm or 15 mm in diameter (max. thickness: 2 mm) or
min. 17 mm in diameter (max. thickness: 40 mm)
Particles Particle size: min. 25 μm
Fibers Min. 100 mg
Fabrics Min. 30 mm x 30 mm
Hollow fiber membranes Length: min. 170 mm
Ceramic membranes Flat sheet: 14 mm in diameter
Single channel: outer diameter 10 mm or 13 mm
Multichannel: outer diameter 25 mm or 30 mm
Height: max. 4 inch
Diameter: 1 inch
Flexible tubing Length: min. 100 mm
Outer diameter: 0.7 mm to 6 mm
Syringe barrel “1.0 mL long” (ISO 11040-4)
Vials 2R/4R vials (ISO format), outer diameter 16 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 24 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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