BPA-1S Bubble Pressure Tensiometer

The BPA-1S Maximum Bubble Pressure Analyzer is the choice for very short adsorption times.


Bubble Pressure Tensiometer for the determination of Dynamic Surface Tension of liquid with very short adsorption times, down to 0.1 millisecond

It can operate as a stand-alone instrument or via a PC. The software allows graphical display of several measurements for comparison. Unique instrument for very short adsorption times down to 0.1 milliseconds. Special capillaries for small bubble volume and dead time.

Applications : surfactants, ink jet, coating, foam and emulsion, detergents, pharmaceutical, cosmetics, food, medicine and biology, ecology.

Surface and interfacial tension 10 to 100 mN/m (dyn/cm)
Accuracy 0.1 mN/m (dyn/cm)
Dynamic time 0.1 milliseconds to 100 seconds
Minimum sample volume 1 mL
Temperature 10 to 80ºC
Dimensions (WxLxH) 25x20x40 cm (10x8x16’’)
Weight 3 kg (6.6 lb.)

The BPA-1S Bubble Pressure Tensiometer is 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 dead time.

  • Direct and accurate measurement of bubble dead time and life time
  • Surface Tension vs. physical time and adsorption time
  • Time range of 6 orders of magnitude, 0.0001 to 100 seconds
  • Precise measurement of Dynamic Surface Tension
  • Correction of effects from gravitation and viscosity of the liquid