Product Overview

The Attension Sigma 703D force tensiometer is a popular choice for educational purposes. The integrated keyboard and screen make it easy to use without requiring an external computer. The sample stage is manually operated. It measures surface and interfacial tension of liquids by Du Noüy ring or Wilhelmy plate methods. 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 (measured manually), which is the concentration of surfactants in which micelles are spontaneously formed. Measurements are displayed in real-time and can be printed or transferred to a computer.