MEASURING SURFACE TENSION - ANALYSING SURFACTANTS
The compact all-round tensiometer measures the dynamic surface tension in three different modes: Single, Auto and Online. This gives it all the functions for a wide range of measuring tasks such as the analysis of wetting behaviour, concentration control or determination of the influence of temperature.
SINGLE-Mode
• Concentration quickly controlled
• Fast and reliable for control tasks
• Measures a value at defined parameters
AUTO-Mode
• Comfortable mode for R&D
• Automated scan of surfactant dynamics
• Characterisation of wetting behaviour
ONLINE-Mode
• Automatic single measurement over a period of time
• Continuous process monitoring
• Analysis of temperature influence
| 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) 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 |
SITA tensiometers have been in use for over 25 years for these applications, among others:
| • | 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 |
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Product development for cleaning, electroplating, inks, paints, etc. |
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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 tensiometer, the SITA pro line t15 is based on the bubble pressure method for measuring the dynamic surface tension of liquids.
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| 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 (mehr...). |
| Surface Tension | |
| Measuring range | 10...100 mN/m (dyn/cm) |
| Resolution | 0.1 mN/m (dyn/cm) |
| Bubble lifetime | |
| Adjustable range | 15 ms...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 |
| 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 |
| Interface, Storage, Dimensions, Weight | |
| USB-Interface | data transfer |
| Display |
LCD, illuminated |
| Storage | SINGLE/AUTO: 25 spaces ONLINE: 6 mio |
| Dimensions (WxHxD) | 75 x 168 x 35 |
| Weight of instrument | 270 g |
Laboratory automation with the Windows-Software SITA-LabSolution
| • | Automation of laboratory measurements with a wide range of accessories for analysing active ingredients |
| • | 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 |
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Controlling a wide range of accessories Burette (fluid dosing unit) Sampler Thermostat Magnetic stirrer, (heating) stirrer |
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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 pro line t15
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• Measuring device SITA pro line t15
• Robust suitcase
• 2 Capillaries PEEK type II or others depending on application
• Power supply
• USB-cable
• Stand
• Device holder
• 2 Sample vessels 50 ml
• Manual
• Calibration certificate
