Food | Viscosity Measurement of Food with the Ball Measuring System for RheolabQC

This report describes the advantages of determining the rheological properties of food and shows how measurements of samples containing particles sized from 1 mm to 5 mm in diameter can ideally be performed.

Many food producers already use rotational rheometers for quality control of their products. In most cases, measuring systems like cylinders or stirrers are used. However, large particles often prevent or influence rheological tests. Therefore, Anton Paar offers the ball measuring system as additional equipment for RheolabQC.

Experimental Setup

The ball measuring system for RheolabQC is perfectly suited for tests on semi-solid food material containing particles with diameters from approx. 1 mm to 5 mm. During the measurement the ball moves in a circular path through the sample. Only during the first rotation, the ball penetrates unsheared material which is not yet cleared of particles. However, even when performing only a single complete rotation, it is possible to obtain a flow curve over several decades of the rotational speed, because RheolabQC is able to quickly control the speed at each individual measuring point. The ball measuring system for RheolabQC consists of a cup showing an inner diameter of approximately 115 mm for a sample volume of approximately 500 mL. The measuring bob is carrying a sphere at a right-angle to the rotor shaft. An external temperature sensor (Pt100) is included in the setup and can be used for temperature measurement in the sample.

 

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