High-performance laboratory tensiometer

OPTIMISED MEASUREMENT OF DYNAMIC SURFACE TENSION FOR RESEARCH, DEVELOPMENT AND QUALITY ASSURANCE

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

• 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

ONLINE mode

• 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

Characteristics

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

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

Application

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

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

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 ...)

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	adjustable
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)

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

Software

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) Sampler Thermostat Magnetic stirrer, (heating) stirrer

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) Sampler Thermostat Magnetic stirrer, (heating) stirrer

Accessories

		Burette (fluid dosing unit) • Active ingredient analyses • Evaluation of concentration curves
		Sampler • Automatic measurements of a large quantity of samples for quality assurance
		Thermostat • Automatic tempering • Analysis of temperature curves
		Magnetic stirrer, (heating)stirrer Sample conditioning • Homogenisation • Sample tempering

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