Precision Force Tensiometers

Smart Interfacial Measurement Solutions for Wettability and Adhesion


Attension Sigma 702

Product Image of Attension Sigma 702

The Sigma 702 is a standalone force tensiometer that provides accurate surface and interfacial tension measurements, manual determination of Critical Micelle Concentration (CMC) and density measurements. The open design and convenient control keyboard operations make these instruments easy to use without the need for an external computer.

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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.

  • Surface tension
  • Interfacial tension
  • Critical micelle concentration (CMC) (manual)
  • Density

Surface Tension/Interfacial Tension Utilizing Du Noüy Ring, Wilhelmy plate or rod, record and analyze the forces exerted onto a probe or solid sample using a sensitive microbalance. The force seen by the balance can be converted into surface tension or interfacial tension when a platinum Du Noüy ring or Wilhelmy plate is used for drawing up the liquid in a meniscus.



Sigma 702

  Product Image of Attension Sigma 702
Available Measurements
Surface Tension Yes
Interfacial Tension Yes
Critical Micelle Concentration Manual
Dynamic Contact Angle No
Surface Free Energy No
Powder Wettability No
Density Yes
Sedimentation No
Balance Specifications
Measturing range (mN/m) 1 – 1000
Displayed resolution (mN/m) 0.01
Density Range (g/cm3) 0 – 2.2
Density resolution (g/cm3) 0.0001
Maximum Load (g) 5
Weighing Resolution (mg) 0.01
Force Resolution (μN) 0.1
Contact angle range (°)
Contact angle resolution (°)
Calibration & Locking Manual
More info Compare all Sigma Models