Surface tensionis a propertyof the surface of aliquid that allows it to resist an external force. We come across many applications ofSurface Tension in our daily life like the use of detergent, soap,shampoo, creams, branded juice, soft drink, bear, pharmaceutical suspensions, printing, writing,printingetc are some common process, where Surface Tension has an importantrole to play. The formulator needs to use various Surfactants in order to develop a product which meet users expectations and are cost effective. They need to optimizethe quantity of various surfactants in order to minimize/ maximize the Surface tension. There are different methods in use for the measurements of Surface Tension, which can be broadly classified as follows:
|Measurement Range||1-999 mN/m|
|Measurement conditions||At room temp and with change in temperature|
KRÜSS Force Tensiometer Model K20 is an instrument to measure surface and interfacial tension of liquids using the Wilhelmy Plate or the Du Noüy Ring method. In addition to this it can also be used to determine the density of liquids.
Fully automatic SFT and IFT measurement
Calibration data is stored internally
Robust, max. load 50 g
Illuminated sample compartment
Fast positioning of the sample
Available in two versions ( manual and motorized platform movement)
Direct power or in-built battery operation.
|Measurement Range||1-400 mN/m|
|Methods||Ring,Plate,Rod,Small Ring,small plate,CMC,Dynamic Contact angle,Liquid & solid densities,L|
|Additional specs||Fully automated Dosing system available for CMC|
|Resolution||0.1 micro g|
Precision in a new dimension is made with the PC-controlled measuring system K100SF that determines the surface and interfacial tension of liquids and solids with the highest effectiveness and efficiency. The built-in ionizer ensures optimal measuring conditions. It is specially designed to measure the wettability of single fibers by contact angle measurement.It is equipped with high resolution force sensor.
Surface and interfacial tension measurements of liquids
Determining the density of liquids
Fitted with high resolution force sensor
Surface energy determination on powders, small plates and single fiber
Extended CMC Critical micelle concentration
Built-in ionizer for eliminating electrostatic charges
Controlled by "ADVANCE" software
|Temperature Range||0- 100 degree celcius|
|Power Consumption||2.5 W|
|Surface Tension||10-100 mN/m|
|Surface age||10-30000 ms|
|Maximum Pressure||1.25 kPa|
|Minimum sample volume||15 ml|
|Method||DU Nouy Ring method|
|Range||1- 90 mN/m|
The Simple Manual Measuring System
A basic tensiometer for rapid determination of interfacial tension and the surface tension of liquids.
KRÜSS Educational Tensiometer model K6 is used for determination of Surface tension of liquids. It uses Pt wire as torsion beam and a Pt-Ir ring for the measurement. It produces fast, easy & accurate measurements for surfactant solutions & solvents.
It is also very suitable for training purposes in schools and universities for demonstrating the action of Surface tension force in a comprehensible manner.
Simple & user-friendly operation
Instrument is supplied with Pt-lr ring and a vessel
Result of the measurement is indicated accurately to 0.5mN/m
|Minimum Order Quantity||1 Piece|
|Measurement Range||1-2000 mN/m|
|Methods||Ring, Plate, Rod, Small Ring, small plate, CMC, Dynamic Contact angle, Liquid & solid densities, L|
|Variants||Two variants available i.e. K100 & K100C|
Dynamic contact angle measurements
Extended CMC - critical micelle concentration
Surface energy calculations on solids, powders, pigments, fiber
Measuring the density of liquids
Sedimentation and sediment resistance measurements
Built-in ionizer for eliminating electrostatic charges
Controlled by Advance software
|Method||Bubble Pressure method|
|Range||10 to 100 mN/m|
|Surface Age Range||5 - 200000 ms|
The Bubble Pressure Tensiometer from KRUSS helps to characterize the surfactants efficiency as never before. BP100 measures dynamic surface tension with high accuracy. This instrument is used to get information about wetting and drop formation in rapid processes. It helps in the development, selection & dosing of surfactants for optimum speed by characterizing mobility of surfactant for which it uses adsorption coefficient & diffusion coefficient of surfactants.
|Method||Spinning drop method|
|Use||for measuring low interfacial tension|
|Measurement conditions||Ambient, of with change in temperature|
|Measurement Range||10exp-6 mN/m to 2000 mN/m|
Microemulsions are gaining grounds wherever organic phases are to be mobilized by aqueous ones for the bioavailability of drugs, tertiary crude oil exploitation, restoration of water, solvent-free degreasing or emulsion polymerization are seen. The Tensiometer SDT from KRUSS helps in the development of mini and microemulsions as a specialist for extremely low interfacial tensions. In addition to single measurements by mouse-click, the software also allows time-controlled series measurements. It saves the results in a comfortable database together with their measuring parameters and drop images as well as the calibration data for the image scale. The plotting function plots the interfacial tension against time or the internally measured temperature. A final mouse-click, and the results are presented in a well-laid-out report.
Automatic image analysis available
Easy loading of test liquids
Illumination and speed can be set by manual controllers
Software also allows time-controlled series measurements
Saves the results in a comfortable database
Plotting function plots the interfacial tension against time.
|Range||0.1 -100 mN/m|
|Minimum Sample Required||20 ml|
|Power Consumption||10 W|
|Thermostat||Quick lock Fittings|
You know just how effective your surfactant is. But do you also know how quick it is?
Whether pumping, stirring or flooding: oil-water interfaces are always in motion. Just knowing the equilibrium value of the interfacial tension is no longer sufficient. The drop volume technique of the DVT50 from KRÜSS records the interfacial tension under dynamic conditions – in an interface age ranging from fractions of a second up to several minutes.
Thanks to its wide measuring range from 100 mN/m down to 0.1 mN/m and the possibility of thermostatting the liquid phases the instrument is suitable for a wide range of applications. Very simple handling during filling and cleaning as well as software control with programmed measuring sequences ensure a smooth measurement procedure with a high sample throughput.
Emulsification in cosmetics, pharmaceutical and food industries
Tertiary crude oil recovery