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High-performance, universal laboratory tensiometer

Measuring, controlling and monitoring the surface tension

Optimized for R&D and quality control

Combines reliable functions of SITA DynoTester+ and SITA pro line t15 in a versatile laboratory tensiometer with premium character.



Meaures the surface tension using the differential pressure method – independent of immersion depth

Large bubble lifetime range: 15 ms (highly dynamic) to 100,000 ms (quasi-static)

Precise readings using robust, application-optimised capillaries

Automatic calibration in water, monitoring of the calibration process


Wide range of functions with different measurement modes:

Auto-Mode: Measures dynamic surface tension curves through the whole bubble lifetime range

Online-Mode: Continuous measurement of adjustable period without a drift of bubble lifetime

Single-Mode: Single measurement at a certain bubble lifetime


Fast and easy set-up of the device

Intuitive operation

Portable in secure storage case

Integrated battery




            Measuring the dynamic surface tension, analysing surfactants

            The new SITA science line t100 is a mobile laboratory tensiometer for research and development as well as for quality control of products with surface active substances.

            Using the bubble pressure method the tensiometer measure the surface tension of liquids within a large bubble lifetime range from 15 ms up to 100,000 ms.

            The device automatically and acurately controls the chosen bubble lifetime without drift and complicated readjustments. The measuring results are presented numerically and graphically on a large color display.

            In combination with the new windows-software SITA-LabSolution a variety of differnt laboratoy devices can be controlled comfortably and thus, laboratory processes are optimally automised.


            Measures the dynamic surface tension through the whole bubble lifetime range

              • Evaluating surfactant effects

              • Analysing the kinetic of surfactants

              • Characterization of the wetting behaviour of surface active agents

                    Continuous measurement of adjustable period without a drift of bubble lifetime:

                      • Automatic measurement of temperature dependencies

                      • Analysing the ageing behaviour

                      • Evaluating the sample stability

                            Single measurement at a certain bubble lifetime:

                              • Control and test requirements

                              • Concentration measurements

                                  Measuring principle

                                  Measuring the dynamic surface tension with the SITA bubble pressure method enables high precision and flexibility without difficult adjustment of the immersion depth. This is done by pumping air through a capillary into the liquid to be analyzed. The pressure within the bubble chances continuously with its radius. The surface tension is calculated from the deviation between pressure maximum and minimum. The calibration is carried out automatically with water. Thereby, the radius of the capillary is taken into account. (read more ...)


                                  The SITA science line t100 is a high-performance bubble pressure tensiometer that can be used for
                                    • Analyzing the kinetics of surfactants in research & development
                                      • Quality control through comparison with reference and limit values
                                        • Automation of measuring and analysis tasks.

                                          Due to its wide bubble lifetime range, liquids containing surfactants as well as other liquids can be measured within a large concentration range.

                                          The following applications are examples for standard applications where surface tension measuring values are measured, compared and documented:
                                            • Optimizing washing and rinsing processes in parts and textile cleaning
                                              • Determining the wetting agent concentration in the electroplating industry
                                                • Monitoring the Isopropyl-alcohol concentration in offset printing
                                                  • Quality control in ink production

                                                    For your security
                                                    our application engineers advise you, if the SITA science line t100 is suitable for your application and how to use it.


                                                    Laboratory automation with the new Windows-Software SITA-LabSolution

                                                    Automation of laboratory measurements with a wide range of accessories for analysing active ingredients
                                                    User-defined sequences for recurrent measuring and controlling
                                                    tasks (mehods)
                                                    Intuitive operation ensures efficient preparation of experiments and
                                                    evaluation of measuring results
                                                    Easy access to all functions of the tensiometer
                                                    Report function for creating measurement protocols and reports

                                                    Controlling a wide range of accessories

                                                    Burette (fluid dosing unit)



                                                    Magnetic stirrer, (heating) stirrer

                                                    Scope of delivery

                                                    - Tensiometer SITA science line t100 (basic unit and sensor)

                                                    - 2 capillaries PEEK type II or capillaries according to application

                                                    - Power supply

                                                    - USB cable

                                                    - Stand

                                                    - 2 sample vessels 50 ml

                                                    - Operating instruction

                                                    - Calibration certificate

                                                    - robust and secure storage case


                                                    Burette (fluid dosing unit)

                                                    • Active ingredient analyses
                                                    • Evaluation of concentration curves


                                                            • Automatic measurements of a large quantity of samples for quality assurance


                                                                • Automatic tempering
                                                                • Analysis of temperature curves

                                                                    Magnetic stirrer, (heating)stirrer

                                                                      Sample conditioning

                                                                      • Homogenisation

                                                                      • Sample tempering

                                                                        Technical data

                                                                        Surface tension
                                                                        Measuring range
                                                                        (10...100) mN/m (dyn/cm)
                                                                        Measuring deviation
                                                                        max. 1% of full scale
                                                                        Resolution 0.1 mN/m
                                                                        Reproducibility 0.5 mN/m
                                                                        Bubble lifetime
                                                                        Adjustable range (15...100,000) ms, nominal
                                                                        Measuring deviation
                                                                        max. 1 ms
                                                                        Resolution 1 ms
                                                                        Control deviation
                                                                        Liquid temperature
                                                                        Measuring range
                                                                        -20...125 °C
                                                                        Measuring deviation max. 0.5% of full scale, adjustable
                                                                        Resolution 0.1 °C
                                                                        Reproducibility 0.3 K
                                                                        General data
                                                                        Power supply 5 V/500 mA (USB), integrated battery

                                                                        Acceptable ambient temperature (storage /operation)

                                                                        (-20...50) °C / (10...40) °C
                                                                        Measuring gas

                                                                        Ambient air, depressurized alternatively: inert gases, (0...300) mbar

                                                                        Display Colour LCD, illuminated
                                                                        Storage 4 GByte, 64 methods
                                                                        Dimensions (HxWxD) Main unit: 200x140x60 mm3, Sensor: 200x35x90 mm3
                                                                        Weight 1,870 g (main unit and sensor)

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                                                                        A business unit of SITA Messtechnik GmbH.

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