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.
SurPASS3-Standard
- 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.

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.

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.

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.

Image Credit: Anton Paar GmbH
Technical Specifications
Source: Anton Paar GmbH
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SurPASS 3 |
SurPASS 3 Eco |
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) 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) |
Non-porous
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 |
Cylindrical
cores |
Height: max. 4 inch
Diameter: 1 inch |
Flexible tubing |
Length: min. 100 mm
Outer diameter: 0.7 mm to 6 mm |
Pre-filled
syringes |
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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