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Analysing foam parameters, Controlling surfactant effects

The new generation SITA FoamTester

20 years of experience meets the needs of innovative foam testing

The SITA FoamTester analyses the characteristics of surfactant-containing liquids easy, fast and precise with automated measuring sequences.


• Fully automated foam analysis

• Precise reproducible foaming

• Measuring foam and liquid volume

• Analysing foam structure

• Automated cleaning


Overview of automated SITA foam testing

The automated foam testing with the SITA FoamTester offers an efficient evaluation of surfactant containing liquids to analyse numerous influence factors on the foaming behaviour.

Functionial components of the SITA FoamTester

Development and application tasks can be easily simulated by the comfortable sample handling with the temperature-controlled sample reservoir and measuring vessel, by the automated cleaning system as well as by the fast and free creation of experiments in the software.

Benefits of automated foam testing

Autonomous repetition of test runs without intervention by the user
Immediate statements about the reproducibility
Fast and easy screening of test and sample parameters

Foam creation

Foaming of the sample by stirring with the proven SITA method

Use of the established SITA standard stirring disc which has been developed for a reproducible and application-oriented foam creation under mechanical pressure

Removable measuring vessel with stirring unit

Differentiation of various sample preparations by adaptable stirring parameters: speed, duration, acceleration, direction, intervals

Measuring principle

Two optical, contactless measuring systems for the determination of foam and liquid volume as well as foam structure

Measuring system Foam Surface Scanner

Determination of the foam topography and the resultant total volume by the structured-light method which reproduces the topography of the foam three-dimensionally by using projection and detection of various stripe patterns

Measuring system Foam Interface Scanner

Determination of the liquid level and the foam structure in the measuring vessel by using the total reflexion with a camera system including a line scan camera and an integrated lightning assembly

Recording of the foam structure over the range
of 130 mm x 50 mm

Combination of both measuring systems for the automatic determination of the foam volume
Analysis of clear and cloudy liquids
All measurements in the same measuring vessel, connected to the thermal circuit

Analyse foam and understand foaming

Convenient evaluation of measuring data with the software SITA-FoamLab in the office

Complete transparency of the measuring progress and the results by intuitive visualisation

Analysis of the slope and the resulting volume during foam formation

Analysis of the foam decay and the drainage

Analysis of bubble sizes and shapes in the foam structure

Comprehensive characterising of foam and foaming
- By the determination of further parameters such as half-life period and foam density
- By the individual height-dependent evaluation of foam structure parameters such as average bubble size or circularity index
- By tracking time dependent changes in the foam structure
- Flexible comparison by clear display of different measuring sequences

Easy export of data and results for documentation



Optimisation of surfactant containing products in

Product Development
Raw material development and selection
Product processing and application

Quality and process assurance

Application examples


Influence of the formulation and raw materials on foaming behavior
Foam stability of toothpaste and foam baths

Foam structure as a reference point for user perception

Cleaning agents

Influence of temperature on the foaming of spray cleaners

Influence of contaminations on the foaming in cleaning baths

Cooling lubricants

Influence of water hardness on aging process
Durability of defoamers

Optimisation of the filtration process to prevent foaming

Inks, paints and coatings

Effectiveness of defoamers

Liquid processing industry

Foaming behaviour of flow suspension in paper industry

Recipe optimisation to reduce foaming in bottle filling of beverages
Adjustment of foaming production auxiliaries in textile manufacturing

Foaming effects of polymers in plastic production

Technical data

Foam creation
Recommended sample volume (200 ... 500) ml
Usable measuring vessel volume

1,500 ml (incl. foam)

height 180 mm
diameter 110 mm

Capacity of sample reservoir
2,000 ml
Sample tempering of measuring vessel and sample reservoir
(0 ... 60) °C using a optional thermostat
Stirring speed (0 ... 2,000) U/min (bidirectional)
Adjustable stirring programs speed, duration, direction, acceleration
Analysis of foam volume (foam creation and decay)
Measurement values
total volume, foam volume, liquid volume
Evaluated parameters max. foam volume, foam half-life, flash foam
Measuring range total volume (0 ... 1,500) ml; resolution 1 ml
Measuring range liquid volume
(0 ... 500) ml; resolution 1 ml
Analysis of foam structure
Parameters number of bubbles, bubble size distribution, average bubble diameter, circularity index
Evaluation area height 130 mm
width 50 mm
Resolution 3,200 dpi
General data
Rinse connection 3/4“ (2 ... 6) bar
Operating temperature (10 ... 40) °C
Power supply (100 ... 240) V / (50 ... 60) Hz,
300 W
Dimensions (HxWxD) (770 x 450 x 305) mm
Weight approx. 35 kg
PC interface



Optional: External laboratory devices for sample conditioning

Extension of experiments by additional functions for sample conditioning

Automatic integration and direct control within the test sequence


Automatic dispenser CAT Contiburette μ10D


for the dosage of liquids

Resolution: 10 µl

Dosing speed: 0,2 - 20 ml/min

Thermostat Lauda ECO RE 415S


for cooling and heating of sample liquids

Temperature range: (-15...200) °C

Ambient temerature range: (5 ... 40) °C

Thermostat Lauda ECO E4S


for heating of sample liquids

Temperature range: (room temperature...200) °C

Ambient temerature range: (5 ... 40) °C

The market launch of the SITA FoamTester is supported within the scope of the German development programme "Market launch of innovative products and product design".

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