KSV Instruments ltd

KSV Sigma 70 - Highly Sophisticated Tensiometer

Sigma 70 is a highly sophisticated fully computer controlled and automatic tensiometer for the measurement and recording of surface and interfacial tensions (SFT & IFT), receding and advancing dynamic contact angles (DCA), determinations of surface free energy of solids (SFE), determinations of critical micelle concentration (CMC), and for the measurement of adsorption behaviour of powders and porous materials.

Sigma 70 uses Du Nouy ring or Wilhelmy plate method for force measurement with its ultra sensitive balance specially designed to meet the requirements of a highly sophisticated Tensiometer, which is even capable of characterising wetting properties of single fibers with thicknesses in the mm range.

Measuring parameters are displayed on-line in clear digits on the interface unit and graphical result presentation can be monitored at the computer screen. All experimental data is stored on the hard disk and the flexible multitasking software allows customised application development.

Standard features:

+ Full computer control and automatic operation of all measuring modes
+ Super sensitive fiber range balance - up to 0.05 µN
+ On-line digital displays of measuring parameters
+ Push and Pull mode for Surface and Interfacial tension measurements, SFT & IFT
+ Automatic calculation of ring correction values according to Harkins & Jordan
   (Huh & Mason and Zuidema & Waters also available)
+ On-line measurements of Dynamic Advancing and Receding Contact Angles, DCA
+ Automatic Critical Micelle Concentration measurements, CMC
+ Surface Free Energy of Solids, SFE (Zisman, Fowkes, Wu, Acid-Base)
+ Density of Liquids
+ Single force curve measurements in SFT & IFT mode
+ Powder Wettability (contact angle of powders)
+ Single Fiber Wettability
+ Adsorption and Dehydration Behaviour of Solids, Powders and Porous materials
+ Wetted Length of Solids & Fibers
+ Automatic software controlled sample thermostation and stirring
+ Thermostation of two different sized sample vessels (diameters 50 and 70 mm)
+ Direct reading of sample temperature
+ Automatic zeroing, taring and reset to start point
+ User selectable and continuously variable speed of the stage drive
+ Powerful 32-bit software for presenting results and graphics on-line on screen
+ Data export facilities to image and ASCII file formats
 + Measurement protocol printout showing all measuring parameters and experimental
  conditions, and basic data

Additional Features (Hardware)

+ Automatic dispenser for CMC measurements (Metrohm or Schott dispensers supported)
+ EXCLUSIVE ! Support for using two Metrohm Dosimat or two Schott dispensers for dilution
  CMC experiments (from very concentrated solutions to almost infinite dilution)
+ On-line measurement of sample pH
+ Special sample vessel for temperatures up to 250 oC
+ Evaporation preventer, thermostated double wall lid made of glass

Specifications

Maximum sample weight

5 g (20 g with counter weight)

Measuring ranges


 

0.25 mN, 2.5 mN and 25 mN;
0-1000 mN/m, depends on the size of the probe;
0-1000 mN/m with a standard Wilhelmy plate,
0-500 mN/m with a standard Du Nouy ring  (ASTM D971)

Resolution

0.01 mN, 0.1 mN and 1 mN

Stage speed

0.1 - 40 mm/min (1.7 - 667 m m/sec)

Standard sample vessels size

70 mm/50 mm

Max. vessel diameter

120 mm

Temperature range

- 10 - 100 oC

Built-in stirrer

Programmable variable speed

Computer requirement

PC running any WINDOWSTM operating system

For additional components for Sigma 70 follow this link to the accessories.

info@ksvltd.fi