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High-performance laboratory tensiometer


The versatile SITA science line t100 laboratory tensiometer enables automated AUTO scans, continuous ONLINE measurements and simple SINGLE controls with the widest parameter range for dynamic surface tension measurements from highly dynamic 15 milliseconds to quasi-static 100 seconds bubble lifetime. It thus combines all the functions of SITA tensiometers and adds METHODS for frequently recurring measurements and concentration characteristics.


• Concentration quickly controlled

• Fast and reliable for control tasks

• measures one value at defined parameters


AUTO mode

• convenient mode for R&D: measurement of dynamic surface tension depending on bubble lifetime (surface age)

• Automated scan of surfactant dynamics

• Investigation of the kinetics of surfactants

• Characterisation of wetting behaviour



• Continuous measurement at bubble lifetime

• Analysis of temperature influence

• Investigation of ageing behaviour

• Evaluation of sample stability

Optimiert für das LABOR

• Großer Blasenlebensdauerbereich 15 ms (hoch dynamisch) bis 100.000 ms (quasistatisch)

• METHODEN: Programmierung von Konzentrationskurven und wiederkehrenden Messaufgaben

• Robuste, anwendungsoptimierte Kapillaren

• Automatisches Kalibrieren in Wasser und Überwachen des Kalibriervorgangs



Surface tension in mN/m

Fields of application

Analysis of the wetting behaviour of surfactants or surfactant-containing products

Control of surfactant concentration

Investigation of temperature dependence for cloud point analysis


3 Modes: SINGLE (one-point measurement), AUTO (automated scan), ONLINE (continuous measurement)

64 Methods with individual parameter settings for frequent measurement tasks

Output of surfactant concentration based on concentration curves

Robust housing, optional accessories such as acid protection and desiccant

Option for external gas connection or dried air for measurement at low sample temperature

Easy rinsing and calibration with water


Capillaries for process use made of PEEK, PTFE or glass

Independent of immersion depth due to differential pressure method

Independent control of the parameter bubble lifetime

Measurement monitoring

Water (DI) as calibration standard


Industrial parts cleaning, electroplating, paints & lacquers, inkjet inks and many more


SITA laboratory tensiometers have been in use for over 25 years for these measurement tasks and applications, among others:

Analysis of surfactant kinetics in research & development
Automation of measurement and analysis tasks
Control of surface tension and surfactant concentration in industrial parts cleaning
Monitoring of the wetting agent concentration in galvanic coating and etching processes
Quality inspection of ink-jet inks as well as paints and varnishes
Measuring surface tension on the line or in the laboratory

Product development for cleaning, electroplating, inks, paints, etc.

Analysis of the temperature behaviour of process chemicals

SITA application consulting develops measurement methods and control procedures for individual use in close consultation. This includes free trial measurements, characteristic curves, rental positions and consultations remotely or on site.

More application examples here

Measuring principle

Like all SITA Tensiometer, the SITA pro line t15 is based on the bubble pressure method for measuring the dynamic surface tension of liquids.

Therefore, as it can be seen in the picture, an air stream is lead through a capillary into the process liquid and the pressure development for the bubble generation is measured.

(read more ...)

Technical data

Surface tension
Measuring range
10...100 mN/m (dyn/cm)
Resolution 0.1 mN/m
Measuring deviation max. 1% of full scale
Reproducibility 0.5 mN/m
Bubble lifetime
Adjustable range 15...100,000 ms
Measuring deviation
max. 1 ms
Resolution 1 ms
Control deviation
Liquid temperature
Measuring range
-20...125 °C
Measuring deviation max. 0.5%, 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

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)


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


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

                      Scope of delivery

                      • Measuring device SITA science line t100 (base device and sensor head)

                      • Robust suitcase

                      • 2 Capillaries PEEK type II or others depending on application

                      • Power supply

                      • USB-cable

                      • Stand

                      • 2 Sample vessels 50 ml

                      • Manual

                      • Calibration certificate


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                      A business unit of SITA Messtechnik GmbH.

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