Attension Sigma 700/ 701
The Attension Sigma 700/ 701 is an automated force tensiometer used to measure the static surface tension and interfacial tension of liquids.






Attension Sigma 700/ 701
The Attension Sigma 700/ 701 is an automated force tensiometer used to measure the static surface tension and interfacial tension of liquids.
Manufacturer | Attension |
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Product Series | Sigma Force Tensiometer |
Measurement principle | Force tensiometry |
Application | Surface Tension - Contact Angle |
Sample type | Chemicals, pharmaceuticals, surfactants, energy, foods, biomaterials, oil & gas |
Measurements | Surface/ interfacial tension, Critical Micelle Concentration, Dynamic contact angle, surface free energy, powder wettability, density, sedimentation. |
Product Overview
The Attension Sigma 700/701 force tensiometer measures the static surface tension and interfacial tension of liquids. A platinum Du Noüy ring, platinum Wilhelmy Plate or platinum rod is suspended from a microbalance. A vessel containing the liquid sample is raised until the ring or plate touches the surface of the liquid. The liquid is drawn up in a meniscus on the solid surface and creates a force due to surface tension. The force is measured by the microbalance and from this the surface and interfacial tensions are calculated.
The information provided includes properties such as dynamic contact angle, surface free energy and wettability. A common application is Critical Micelle Concentration (CMC) which is the concentration of surfactants in which micelles are spontaneously formed.
The Sigma 700/701 force tensiometers are computer controlled. The OneAttension software provides a high level of automation with live analysis and multiple measurement options. It includes automated measurement of CMC.
Sigma 700 is the most versatile tensiometer with an auto-calibrating microbalance that measures up to 210g. The wide measurement range makes it suitable for heavy solids and powder samples.
Sigma 701 has a more sensitive microbalance with a narrower weight range and a maximum load of 5g. The high sensitivity it ideal for dynamic contact angle measurements of fibers.
- Demonstration video
- Benefits
- Applications
- Sigma range comparison
Demonstration video
Benefits
- High precision microbalance and motorised sample stage.
- Instrument operation and data storage is fully computer controlled.
- OneAttension software automates measurements and results presentation.
- Widest range of measurement modes.
Applications
- Influence of Contact Angles and Surface Free Energies on Biocompatibility of Biomaterials
- Critical Micelle Concentration Measurement in Aggregation Behaviour Studies
- Wettability of Pharmaceutical Powders
- ASTM D971 Standard Test Method for Interfacial Tension of Oil Against Water by the Ring Method
Sigma range comparison
SIGMA 700 | SIGMA 701 | SIGMA 702 | SIGMA 702ET | SIGMA 703D | |
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Surface tension | √ | √ | √ | √ | √ |
Interfacial tension | √ | √ | √ | √ | √ |
Critical Micelle Concentration | Automatic | Automatic | Manual | Manual | Manual |
Dynamic contact angle | Automatic | Automatic | Manual | Manual | Manual |
Interfacial tension | √ | √ | – | – | – |
Surface free energy | √ | √ | – | – | – |
Powder wettability | √ | √ | – | – | – |
Density | √ | √ | √ | √ | √ |
Sedimentation | √ | √ | – | – | – |
Balance range | 1-2000 mN/m | 1-1000 mN/m | 1-1000 mN/m | 1-1000 mN/m | 1-1000 mN/m |
Balance max load | 210 grams | 5 grams | 5 grams | 5 grams | 5 grams |
Sample stage | Motorized | Motorized | Motorized | Motorized | Manual |
Temperature control mechanism | Range of water bath accessories | Range of water bath accessories | Built-in thermostatic vessel for water bath | Thermostatic vessel for water bath | Range of water bath accessories |
Stirrer | √ | √ | – | – | – |
Provided software | OneAttension | OneAttension | Data receiver | Data receiver | Data receiver |
Product Enquiry
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