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Ross Miles Foam Analyzer – RMFA

Chemical analysis

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Our Ross Miles Foam Analyzer – RMFA is the world's first instrument for automatic measurements of foamability and foam stability in accordance with ASTM D 1173.

Exact repeatability and time saving due to electronic height measurement

The RMFA uses standardized vessels in a newly-developed measuring set-up for electronic, optical foam height detection. Measuring the initial foam height does not have to be coordinated with the discharge of the reservoir solution anymore, but is registered electronically. Thanks to narrowly observed measuring times as per Ross-Miles of one, three, and five minutes and a height resolution of 0.4 mm, analyses in accordance with ASTM D 1173 achieve precision that was previously unheard of.

The quality of the analysis also no longer depends on the care that is taken by the user when reading the foam height. This has increased the repeat accuracy considerably. The electronic data measurement also saves a great deal of time, since the measurement no longer has to be followed live. The user therefore gains five minutes with every foam analysis, which he can use to prepare the next sample, for instance.

More than fulfilling the standard: decay curve and drainage recording

With the RMFA, not only are the measuring points recorded according to the standard, but additionally data for the entire decay curve are obtained with high chronological density. The foam stability can be characterized in greater detail in this way. Furthermore, the instrument also registers the liquid height and therefore provides information about drainage. This information is particularly useful for foam applications in which the liquid content plays an important part, such as foams for washing and cleaning.

Quick and reliable installation and cleaning

Preparing the measurement with the large, standardized glass vessels is extremely easy with the RMFA. The column is securely fixed between the LED and the sensor strip of the instrument in just a few quick steps. It is absolutely perpendicular, so that the reservoir solution always enters the presented liquid in the center. Like this the turbulence for foam formation is excellently reproducible.

Handling is made even more simple and convenient by an optional rack beneath the RMFA with a collection vessel into which the liquid can be emptied. Therefore, the glass column remains in the instrument for draining and cleaning the whole time.

Setting up, starting and evaluating measurements in an intuitive way

ADVANCE, the software for the RMFA, combines a user interface that is oriented to the workflow with self-explanatory operation and an appealing design. A new measurement with a standard-compliant procedure can be created from a measuring template with a single click. The results and raw data curves of any desired analyses can be displayed together quickly and easily in tables and charts. Since ASTM D 1173 recommends the examination of different surfactant concentrations, this effortless comparison of results is also ideally oriented to the standard.

Tasks and applications
  • Foams for washing and cleaning
  • Foams in body care products
  • Surfactant development
  • Flotation as a method for separating solids
  • Foam-inhibiting and foam-reducing agents (Antifoamers / Defoamers)
  • Foam prevention for paints and varnishes, process and waste water and cooling lubricants
Measuring methods and options
  • Automatic foam height measurement in accordance with ASTM D 1173 with a resolution of 0.4 mm
  • Automatic start of measurement when the initial foam height is recorded  
  • Exact measurement of foam height after 60, 180 and 300 seconds
  • Recording of the entire height curve
  • Recording of the liquid level for measuring drainage
  • Quick compilation of multiple measurements in comparison tables and charts

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See also

Gas analysis Air analysis Water analysis Soil analysis Combustion analyzers Composition of liquids and density Composition of solids Electrodes, Measuring probes

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