Attension® Sigma Force Tensiometers
Attension® Sigma 702
The open design and convenient control keyboard operations make the Sigma 702 extremely easy to use. Results are displayed on a large integrated digital screen. The instrument comes equipped with data software and can be connected to an external computer for additional data storage and simple reporting.
Open Design
Open design style for easy sample access
No Computer Required
Run experiments and display results without the need for a computer
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Streamlined Precision for Everyday Laboratory Use
The Sigma 702 is a compact, standalone tensiometer designed for routine use in labs and production environments. Its open layout and integrated controls streamline daily workflows, with no external PC required for operation. The motorized stage and precision balance deliver consistent performance across repeated tests. With both standalone functionality and optional PC connectivity, the Sigma 702 balances ease of use with reliable measurement accuracy.
Supported Measurements
Surface Tension/ Interfacial Tension
Measures forces at a liquid’s surface or at an interface between two dissimilar phases.
Applications:
Detergents, agrochemicals, paints, food science, pharmaceuticals
Critical Micelle Concentration (CMC)
Measures the surfactant concentration where micelles form
Applications:
Pharmacology, contaminants, detergents, sodium dodecyl sulfate (SDS) studies, cosmetics
Density
Determines the density of a liquid using a probe of known weight, or the density of a solid using a liquid of known density
Applications:
Oil, food science, pharmaceuticals, coatings
Attension® Sigma 702
Product Features
Balance Hook Probes
Balance hook probes for the Sigma 702 include essential tools for surface and interfacial tension measurements. The Du Noüy ring and Wilhelmy plate, both made from platinum and compliant with international standards, are used in classic tensiometry methods. The platinum rod functions well with small liquid volumes, while the density probe is used to determine liquid density with high accuracy. These probes cover key measurement needs in routine research and quality control tasks.
Standalone Operation
The Sigma 702 runs as a fully standalone system, with a built-in digital screen and keypad that eliminate the need for a connected PC during routine operation. Results are displayed directly on the integrated screen, and data can be exported to an external computer for reporting or further analysis. This design simplifies day-to-day workflows, especially in production or quality control environments.
Motorized Sample Stage
The motorized sample stage moves with high precision, reaching position resolutions down to 0.01 mm and speed control as fine as 0.01 mm/min. This level of control is critical for precise sample positioning during surface tension and interfacial tension measurements. Stage movement is fully automated through the integrated keypad and on-screen interface, reducing variability and improving repeatability. Manual control is also available for quick adjustments.
High-Resolution Balance
The Sigma 702 features a microbalance with 0.01 mg resolution and a maximum load capacity of 5 g. This level of sensitivity captures even subtle changes in force, which is essential for low-tension systems or small sample volumes. Automatic balance calibration helps maintain consistency across repeated measurements, reducing the need for manual adjustment.
Application Support & Local Service
In the US and Canada, the Attension products are supported and serviced by Nanoscience Instruments. We pride ourselves on providing exceptional application support and field service, ensuring your team of users is well-trained and the instrument is up and running in optimal condition. Whether you are interested in discussing the feasibility of a specific experiment or need help with troubleshooting your Attension system, our Support teams are here for you!
Attension® Sigma 702
Product Knowledgebase
Webinar
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White Paper
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