Maximum bubble pressure tensiometer
New development based on more than 10 years of experience in bubble pressure measuring technique. Many new instrumental details have been published recently, such as the determination of bubble time characteristics from the gas flow signal.
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Features of the instrument |
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- Four different measuring modes available.
- Process controlling option on board.
- Two different displays - text or graphic - available.
- BPA-1P is the simplified version of the BPA-1S representing
- the high end instrument in bubble pressure tensiometry
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Technical |
Data |
| Range of surface and interfacial tension |
10 to 100 mN/m |
| Reproducibility of measured values |
± 0.1 mN/m |
| Accuracy of surface tension |
± 0.25 mN/m |
| Dynamic time range |
10 ms to 10 s |
| Display |
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text display |
4 x 20 characters |
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graphic display |
bw 320 x 240 pixel |
| Minimum volume test liquid |
10 mL |
| Temperature range |
Room temperature |
| Experimental time: |
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Standard mode (M1) |
20 - 30 minutes |
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Fast mode (M4) |
4 - 6 minutes |
| Software |
Windows software
(free update over 1 year after purchase) |
| Number of measurement points: |
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All scan modes (M1, M3, M4) |
maximum 180 |
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Constant mode (M2) |
minimum 30000 |
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The instrument allows the following measurements |
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- Dynamic surface tensions in a time interval from 10 ms to about 10 s
- Provides various time scales: bubble frequency, physical time, adsorption time
- Automatic consideration of the capillary's immersion depth
- Consideration of bubble deformation from sphericity
- Correction of viscosity effects
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Software |
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BPA-1P operates as stand-alone instrument. It stores data on board for 180 measurements. Data download from the instrument to a PC via RS-232 or USB port.
The software allows graphical display of several measurements for comparison. Graphics with various zoom functions supports the visual analysis of the data.
Export as text file or directly into MS Excel. | |