Optimised measurement of dynamic surface tension for reasearch, development and quality control
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.
SINGLE-Mode - Single measurement
- Fast and reliable for control tasks
- Measures a value at defined parameters
- Determination of concentration through individual characteristic curves
AUTO-Mode - Measurement within an adjustable Bubble lifetime range
- 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
ONLINE-Mode - Continuous measurement
- Continuous measurement at bubble lifetime
- Analysis of temperature influence
- Investigation of ageing behaviour
- Evaluation of sample stability
Optimised for the laboratory
- Large bubble life time range: highly dynamic 15 ms - quasi-static 100 s
- 64 Methods: programming of concentration curves and recurring measurement tasks
- Robust, application-optimised capillaries made of PEEK, PTFE or glas
- Automatic calibration in water and monitoring of the calibration process
| Quantity | 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 |
| Use |
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 |
| Measurement |
Capillaries for process and laboratory use made of PEEK, PTFE or glass (Reusable and adapted to different liquids) Independent of immersion depth due to differential pressure method Independent control of the parameter bubble lifetime |
| Measurement monitoring | Water (DI) as calibration standard |
| Industry | 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.
Like all SITA Tensiometers, 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.
| 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 | adjustable | |
| Liquid temperature | ||
|---|---|---|
| Measuring range | -20...125 °C | |
| Measuring deviation | max. 0.5%, adjustable | |
| Resolution | 0.1 °C | |
| Reproducibility | 0.3 K | |
| General data | ||
|---|---|---|
| Display | LCD, illuminated | |
| Storage | 7 Methods for 256 meachurements each with up to 10,000 measuring values | |
| Acceptable ambient temperature (storage /operation) | (-20...50) °C / (10...40) °C | |
| Measuring gas | Ambient air, depressurised alternatively: inert gases | |
| Dimensions (HxWxD) | Main unit: 200x140x60 mm3, Sensor: 200x35x90 mm3 | |
| Weight | 1,870 g (main unit and sensor) | |
Laboratory automation with the Windows-Software SITA LabSolution
- Automation of laboratory measurements and active ingredient analyses
- Intuitive operation
- User-defined sequences for recurrent measuring and controlling tasks (templates)
- Efficient preparation of experiments
- Measurement of temperature curves
- Simple generation of individual concentration curves
- Comfortable report function for creating measurement protocols and reports
Integration of a wide range of accessories for sample preparation and conditioning
- Burette (fluid dosing unit)
- Thermostat
- Magnetic stirrer, (heating) stirrer
Publications
- Was sagt mir die Oberflächenspannung?
- Akustische Messung und Tensiometrie kombiniert
- Analyse und Überwachung von Tensidkonzentrationen. Sensoren zur Messung der dynamischen Oberfflächenspannung in technischen Prozessen.
- Chrom(VI)-Emissionsmanagement mit PFOS- und schaumfreien Netzmitteln in Chromelektrolyten
References
SITA measuring devices have been successfully used in a variety of applications worldwide for over 25 years. The companies listed here represent just a small selection of our extensive customer base
Simply get in touch with us. You can find the contact details of our sales and application department under contact persons.
For support in your country, please see our international sales partners.
Alternatively, send an e-mail to info@sita-messtechnik.de, call us at +49 351 288 53-0 or send us a message using the contact form.