Classical method to measure the surface and interfacial tension of liquids
Principle is based on the accurate determination of the volume of drops detaching from circular capillaries.
Fast drop formation allows short time measurements.
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Instrument parts |
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- Automatic dosing system - automatic refilling
- Temperature controlled measuring cell
- Data acquisition via RS-232
- Automatic cleaning procedure
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Features of the instrument |
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- Very compact construction
- Surface and interfacial tension of liquids
- Dynamic interfacial tensions in a time range of less than one second up to several minutes
- Complements the profile analysis tensiometry at short times, in particular for liquid/ liquid interfaces
- Use with any PC or laptop
- No time-consuming filling procedure as it refills automatically from a reservoir
- Correction of the viscosity effects at short drop times
- Small size, small price, and easy to handle
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Technical |
Data |
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| Range of surface and interfacial tension |
1 to 100 mN/m;
Resolution: ± 0.2 mN/m |
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| Time range: |
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Constant drop formation |
0.2 s to about 1000 s |
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Time scan (standard) |
0.2 s to about 1000 s |
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| Drop formation |
Single drops
Averaged number of drops |
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| Syringe volume (automatic refill) |
0.1, 0.25, 0.5, 2.5 mL |
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| Density difference |
> 0.1 g/cm3 |
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| Software |
Windows
(free update over 1 year after purchase) |
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| Measuring duration |
1 minute to 1 hour |
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| Measuring Option: |
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Constant drop time |
Arbitrary number of points |
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Standard mode |
Selection of points in a user given time interval |
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| Temperature range |
10° to 80° C |
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