DFA100 Dynamic Foam Analyser

DFA100 Dynamic Foam Analyser measures the structure and stability of quickly decaying or long lasting foam to help optimise foam forming products or avoid form formation.

Manufacturer	KRUSS
Product Series	KRUSS Foam Analyser
Measurement principle	Tensiometry – Force & Optical
Application	Surface Tension – Contact Angle
Illumination	LED
Wavelength	469 nm (optional IR: 850 nm); 633 nm FSM model
Stirring speed	up to 8000rpm
Approved temp	4 to 90 °C

The KRUSS DFA100 Dynamic Foam Analyser is designed for high performance optical testing of fluid foam structures and stability. It supports the optimisation of of foam forming or foam prevention products, analysing the entire spectrum, from slow to very fast decaying foams. The instrument can also measure foam structure with regards to bubble size and distribution or the liquid content of the foam.

The DFA100 uses optical sensors, either blue LEDs or Infrared light for opaque liquid foam to dynamically measure the quantity of the foam produced. It determines the number, size and size distribution of the bubbles and the decay characteristics over the whole measuring cylinder height. Simultaneously the quantity of discharge of liquid from the foam (drainage) into the liquid pool is measured by the same senor to provide a more complete understanding of the dominant decay phenomena.

The DFA100 can provide accurately controlled foaming in a variety of ways most commonly by pushing air or CO2 through a glass filter plate or by stirring using a blade in any customisable shape. Foam can also be created externally for subsequent analysis or at high temperature up to 90°C. The measurement chamber can be completely removed for ease of cleaning.

ADVANCE is an intuitive software platform for foam analysis where all measurement parameters are customisable and every measurement can be fully automated. It is easy to use, allows live observation and provides numerous reports to compare measurements across different samples.

Dynamic Foam Analyser – DFA100

Software-controlled foaming by means of sparging or stirring
Investigations of externally produced foams
Determination of total, foam and liquid height
Foamability parameters including maximum height, foam capacity and foam density
Decay parameters including decay start and half life
Temperature-controlled measurements up to 90°C

With Foam Structure Module – FSM

Measurement of bubble size distribution and the change in this distribution in different resolution ranges
Calculation of mean bubble size and its standard deviation
output of a histogram for each individual image in the series of measurements

With Liquid Content Module – LCM

Simultaneous measurement of liquid content up to seven levels
Maximum liquid content at each each level
Half life (time for the liquid content to reduce to one half) at each level

Key applications for the DFA100 include food, drinks, cosmetics and cleaning agent industries, where the tactile properties linked with bubble structure play a role in addition to foam stability.

Foams for washing and cleaning
Firefighting foams
Foams in foods and personal care products
Surfactant development
Flotation as a method for separating solids (e.g. paper recycling, Enhanced Oil Recovery, EOR)
Foam-inhibiting and foam-reducing agents (antifoam/ defoam)
Foam prevention for paints and varnishes, process and waste water, and cooling lubricants

What is the KRÜSS DFA100 used for?
The DFA100 is a dynamic foam analyser used to measure foamability, foam stability, foam decay, liquid content, and bubble structure in liquid foams. It helps researchers optimize foam-forming products or prevent unwanted foam formation.

What industries commonly use the DFA100?
The instrument is widely used in detergents and cleaning products, personal care, food and beverage, firefighting foams, flotation processes, paints and coatings, wastewater treatment, and surfactant development.

How does the DFA100 generate foam?
Foam can be generated using controlled gas sparging or mechanical stirring. The system can also analyze externally generated foams and supports different gases, including air, nitrogen, and carbon dioxide.

What parameters can the DFA100 measure?
The DFA100 can measure: Foam height and volume; Foam stability and decay; Foam half-life; Foam density; Foam capacity; Liquid drainage; Bubble size and size distribution (with optional modules)

Can the DFA100 analyse bubble size and foam structure?
Yes. With the optional Foam Structure Module (FSM), the DFA100 measures bubble size, bubble size distribution, bubble count, and structural changes in foam over time using automated image analysis.

Can the DFA100 measure foam liquid content and drainage?
Yes. The optional Liquid Content Module (LCM) measures foam moisture and drainage behavior using conductivity measurements at multiple foam heights simultaneously.

Can measurements be performed at elevated temperatures?
Yes. The DFA100 supports temperature-controlled measurements from 4°C to 90°C, allowing simulation of real-world process conditions.

Is the DFA100 suitable for method development and quality control?
Yes. Its highly reproducible foam generation and automated analysis make it ideal for both R&D studies and routine quality control testing.

Can I have a demonstration or free trial of the DFA100?
Yes, contact us for a booking. We can arrange a personalised demo and test your samples within our lab facility in Sydney. Onsite free trials are also available. Contact us or complete a request a demo form to get started.

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