The simplest of the precise
MEASURING SURFACE TENSION -
CONTROLLING SURFACTANT CONCENTRATION
The mobile hand-held tensiometer measures the surface tension as well as the surfactant concentration easily and quickly in the laboratory and at the production line. It shows the measured values directly on the comfortable display and alerts when set limits are exceeded or not reached - for process monitoring and quality control.
MOBILE
• Small, light and mobile without PC or laptop
• Battery capacity up to 10 h
• Practical case for transport and storage
PRACTICAL
• Simple measurement at the touch of a button
• Fast control of surface tension
• Capillary optimised for process use
PRECISE
• Display of surfactant concentration with range limits
• Measured values can be compared with other SITA tensiometers
• 25 measuring profiles for tasks from bath control to process documentation
Characteristics
| Quantity |
Surface tension in mN/m |
| Fields of application |
Measuring the surface tension of liquids at the plant or in the laboratory Control of surfactant concentration Comparative analysis of surfactant-containing products |
| Use |
25 measuring profiles for managing the measuring tasks Robust housing and optional acid protection 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 |
Applications
SITA tensiometers have been in use for over 25 years for these applications, among others:
| • | Control of surfactant concentration in cleaning and rinsing baths in industrial parts cleaning |
| • | Monitoring of the wetting agent concentration in galvanic coating and etching processes |
| • | Measuring the surface tension of liquids at the plant (atline) or in the laboratory (offline) |
| • | Quality testing of ink-jet inks as well as paints and varnishes |
| • |
Incoming and outgoing inspection of surfactant-containing products |
| • |
Mobile use in the field and in the production area |
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.
Measuring principle
Like all SITA Tensiometer, the DynoTester+ is based on the bubble pressure method for measuring the dynamic surface tension of liquids.
The principle of the bubble pressure method is, that an air stream is lead through a capillary into the process liquid. A sensor measures the pressure which is needed to generate a bubble. (more...).
Technical data
| Surface tension | |
| Measuring range | 10...100 mN/m (dyn/cm) |
| Resolution | 0.1 mN/m (dyn/cm) |
| Bubble lifetime | |
| Adjustable range | 15...20,000 ms |
| Resolution | 1 ms |
| Max. regulation deviation |
5 % |
| Max. viscosity | 2,000 mPas |
| Sample temperature | |
| Measuring range | 0...100 °C |
| Resolution | 0.1 K |
| Concentration | |
| Measuring range, unit | User defined |
| Power supply | |
| USB power supply | 100...240 V / 5V |
| Li-Ion battery |
3.6 V / 1,950 mAh, min. 10h operating time |
| Max. power consumption |
2.5 W |
| General data |
|
| USB-Interface | Data transfer |
| Display | LCD, illuminated |
| Number of measurement profiles | 25 |
| Storage | 25 memory locations per profile |
| Dimensions (WxHxD) | 75x168x35 in mm |
| Weight | 260 g |
Software
The Windows software SITA-ProcessLog allows an easy control of all functions of the tensiometer with the PC as well as a comfortable management of the saved measuring data.
| • | Management and graphical analysis of saved measuring data |
| • | Documentation and evaluation of the process and products‘ characteristics |
| • | Simple and easy preparation of measuring reports |
| • | Controlling the measurement via PC in the laboratory |
| • | Simple generation of concentration curves based on defined samples |
Accessories
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Capillaries |
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Type I PEEK easy manual cleaning for paints and varnishes |
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Type II PEEK for monitoring process liquids |
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Type III Glass for agressive liquids |
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Disposal capillaries PTFE for special cases |
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Device protection |
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Acid protection kit PE jacket for sensor head or device, borosilicate glass protection for temperature probe, glass cover |
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Sample handling |
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| Sample vessels 50 ml |  |
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Mini sample vessels - 5 ml for measuring very small sample volumes |
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Double walled glass vessel for use with thermal liquid circulator (thermostat) including special cover and insulation |
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Laboratory devices |
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Heating plate with magnetic stirrer and stand for SITA DynoTester+
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Scope of delivery
• Measuring device SITA DynoTester+
• Robust suitcase
• 2 Capillaries PEEK type 2 or others depending on application
• Power supply
• USB-cable
• Stand
• Device holder
• 2 Sample vessels 50 ml
• Manual
• Short manual
• Calibration certificate
