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You are here: Product Catalog > Tensiometers > Tensiometers Selection Guide

Bubble Pressure Analyzer BPA-1S

 
 
This bubble pressure analyser is a tensiometer based on the principle discovered by Fainerman. This principle consists in the accurate detection of the transition from a gas jet to individual bubbles in a critical point. This critical condition is used for the determination of the characteristic bubble deadtime. It appears to be essential that extremely short adsorption times can be reached only if the instrument gives access to measurements close to this transition region between the gas jet regime and the formation of single bubbles.

This is the scientific version of the bubble pressure tensiometer BPA-1P.


 
 

 Features of the instrument

 
  • Dynamic surface tensions in a time interval from 0.1 ms up to about 100 s
  • Provides various time scales: bubble frequency, physical time, adsorption time
  • Temperature controlled measuring cell
  • Automatic consideration of the capillary's immersion depth
  • Consideration of bubble deformation from sphericity
  • Correction of viscosity effects

 

 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  ± 0.1 mN/m  
 Dynamic time range  0.1 ms to 100 s  
 Graphic display  bw 320 x 240 pixel  
 Minimum volume test liquid  10 mL  
 Temperature range  10 .. 80°C  
 Experimental time:  
 •  Standard mode (M1)  20 - 30 minutes  
 •  Fast mode (M4)  4 - 6 minutes  
 Software  Windows
(free update over 1 year after purchase)
 Number of measurement points:    
 •  All scan modes (M1, M3, M4)  maximum 180  
 •  Constant mode (M2)  minimum 30000  


 
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