Liquid density / concentration in-line monitor
1 - 10 bar, - 3 - 25 °C | PLATO
Centec Gesellschaft für Labor- und Prozessmesstechnik mbH
Specifications
* Temperature -3 to +25 °C
* Concentration 0 to 20 °Plato
* Pressure 1 to 10 bar
Description
Before the fermentation a 2-component-system is existing consisting of extract and water. The concentration of this system can be achieved by defining a physical property, like the density or the sound velocity of the medium. After the fermentation alcohol is added as a third component. Now a 3-component-mixture consisting of extract, alcohol and water is generated. Therefore 2 physical quantities, independent of each other, must be determined in theory. That is a combination of density and sound velocity measurement. Due to a special feature of the quantity "sound velocity" the original wort of beer can also be determined with only this single quantity sound velocity as well. This can be explained by the increase of the sound velocity through the arising alcohol during fermentation, which is nearly 1:1 compensated by the reduced (fermented) extract. As it is generally known during the fermentation two parts extract are transformed into approximately one part alcohol. This virtually leads only to an insignificant increase of the sound velocity value during fermentation. For example an original wort value of 12 °oPlato before the fermentation climbs on merely 13,5 °Plato at a degree of fermentation of 80 %. This small difference allows the practical use of the Sonatec sound velocity sensor for the determination of the original wort without the need to determine extract and alcohol in a separated way.
