Foam Analyzers are used for characterizing foams by sparging a gas (usually N2) through a liquid under controlled conditions. The instruments measure in real time how much foam is formed (foamability) and how fast it disappears (foam stability) once foam generation has stopped. Furthermore, the bubble size, the bubble size distribution, and the bubble size evolution can be determined as function of time.
The quantity of liquid trapped in the foam can be measured by means of conductivity. From the measured conductivity the FoamScan can determine automatically the liquid fraction ε in the foam via five electrode pairs along the column (Figure 1).
Fig. 1 Foam Scan Apparatus
Tamara Schad
Dr.Postdoctoral Research Associate
Natalie Preisig
Dr.Scientific Staff