FoamScan is designed to measure the ability of a liquid to generate foam by sparging a gas through the liquid. It will also determine persistence of the generated foam by measuring variation in its volume, density, and drainage rate.

Liquid sample is placed in a chamber which can be thermostatically controlled (optional). Onto this chamber is fixed a glass column equipped with several pairs of conductivity electrodes. Foam develops in the sample chamber (by sparging or stirring, optional) and rises into the glass column where it is viewed continuously by a video camera. Images from the video camera are captured by software along with conductivity measurements at all the electrodes. This data is used to calculate and plot foam volume and conductivity in real time. 

Measurements made by FoamScan

Values measured and displayed in real time:

  • Gas flow rate or speed of mixing (FOAMSPIN® option)
  • Foam volume,
  • Volume of sample liquid remaining,
  • Foam conductance at four different foam heights,
  • Liquid fraction in the foam at for different foam.

Values calculated in real time and displayed upon completion of the experiment:

  • Volume of liquid trapped in the foam,
  • Foam density,
  • Bikerman index,
  • Volume stability of the foam,
  • Liquid stability of the foam,
  • Coefficient of expansion of the foam,
  • Capacity for foaming,
  • Parameter of retention (for the RUDIN test).


  • All instrument operation are controlled by software which runs under Windows XP or Vista
  • Minimum volume of liquid sample: 20ml
  • Gas flow up to 500 cm3/min
  • No correction factor
  • Agitation speed (FOAMSPIN® option):up to 6000 rpm
  • Device friendly and robust construction.


  • Foamspin Option: Foam generation by stirring
  • Measuring tubes with jacket to allow temperature control (90°C maximum)
  • CSA Option: Bubbles Size Analysis (Cell Size Analysis CSA)
  • KLEE Option: Automatic rinsing between experiments
  • Sampler Option: Sampling automatic and continuous analysis of 15 samples maximum
  • Option HTHP: Measurements under pressure and high temperature (120°C, 8 bar).