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Bubble Pressure Analyzer BPA-1P

Bubble Pressure Analyzer BPA-1S

Drop Volume Analyzer DVA-1

Foam Analyzer FA-1S

Interfacial Shear Rheometer ISR-1

Manual Drop and Bubble Shape Tensiometer PAT-2P

PAT-1 Automatic Drop and Bubble Shape Tensiometer

PAT-1: Contact Angle Module CA-1

PAT-1: Drop Pressure Module DPA-1

PAT-1: Oscillating Drop and Bubble Analyser ODBA-1

Ring and Plate Tensiometer STA-1
 
   
   
You are here: Product Catalog > Tensiometers > Tensiometers Selection Guide

PAT-1: Drop and Bubble Micromanipulator DBMM-1
 
 
This special equipment is dedicated to studies of the direct interaction between droplets or bubbles. 

Systems like emulsions or foams or foamed emulsions consist of ensembles of drops or bubbles or mixed drops and bubbles. The direct interaction of these entities yields information on the stability of the liquid disperse systems.

The drop and bubble micro manipulator DBMM-1 fits as an accessory into the profile analysis tensiometer PAT-1.

This instrument gives access to the capillary pressure inside the individual drops and bubbles. It allows the manipulation of the size of the two entities and to move the entities against each other to bring them into interaction. It also allows the measurement of the coalescence time.
 

 DBMM-1

  

This instruments facilitates the following measurements:

  • Surface and interfacial tension of liqiuds (also of iso-dense systems) 
  • Coalescence of drop-drop, bubble-bubble, and drop-bubble systems 
  • Dynamic interfacial tensions in the short time range (0.01 - 100s) 
  • Available needles allow to form drops or bubble on a scale between
    50 µm and 1 mm or more 
  • Drops or bubbles can be manipulated by a very fine piezo dosing system
 

 Technical Data:

  
Range of surface and
interfacial tension		 1 to 1000 mN/m
Resolution: ± 0.1 mN/m 
Optics Fixed objective with high magnification
CCD-camera, max. resolution of 768x576 pixels
Optical distortion: < 0.05 % (in PAT-1)
Frame grabber Nl high-quality digitising board (in PAT-1)
Transfer rate: 25 images per second
Measuring Options:
-  Single drop/bubble
-  Pair wise drop/bubble
   for coalescence		 Surface / interfacial tension
Oscillations up to 100 Hz
 
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