Concentration is the abundance of a component divided by the total volume of a mixture. The most common concentrations are the percentage of weight or volume present in a mixture. Various units are used to express concentration, each catering to specific industries, scientific disciplines, or chemical applications.


Viscosity and density meter SRD with SME-TRD electronics

Figure 1. SME-TRD with SRD probe


TABLE OF CONTENTS


1. How is concentration measured with the SRD?

Rheonics offers different kinds of concentration models, which are calculated using Rheonics' algorithms internally by the SME, the calculation model can be loaded using the Rheonics Control Panel software (RCP) or from the factory. The rheonics electronics uses the density measured from the SRD and depending on the case it also uses the temperature.


Concentration Models:



2. What Units are available in Rheonics SRD?

These diverse concentration units are crucial for ensuring accurate and standardized communication of material properties across different fields. Each concentration model has its specific unit, but some of them are dimensionless, for those cases, Rheonics uses a representative unit as the Specific gravity case.



Units


Applications

Transmitter Display View


°P (Degree Plato)
  • Breweries 
  • Beverage

°B ( Degree Brix)
  • Soft drinks
  • Fruit juices
  • Tomato concentrates
  • Beverage Industry 
  • Cutting Oil
  • Machining/Industrial
°Bé (Degree Baume)
  • Sugar beet processing
  • Ophthalmic
  • Starch industry
  • Winemaking
  • Industrial water treatment
  • Printed circuit board (PCB) fabrication
SG (Specific Gravity)
  • Chemical Industry
  • Petroleum Industry
  • Pharmaceutical Industry
  • Metallurgy
  • Food and Beverage Industry
  • Water Treatment
°API (Degree API )
  • Crude Oil Classification
  • Refining Suitability
  • Reservoir Engineering
%w, %w/w, or %wt (Concentration percent based on weight )
  • Adhesives and Coatings
  • Biotechnology
  • Chemical Manufacturing
  • Quality Control in Manufacturing
  • Mining and Metallurgy
  • Pharmaceuticals
  • Food and Beverage Industry
  • Oil and Gas Industry
%v, %v/v or %Vo (Concentration percent based on Volume)
  • Adhesives and Coatings
  • Biotechnology
  • Chemical Manufacturing
  • Cleaning and Sanitizing Solutions
  • Pharmaceuticals
  • Food and Beverage Industry
  • Oil and Gas Industry


3. Why is it important to measure concentration?

Measuring concentration is essential to ensure the quality and security of the products, minimize waste, and control the reactions of the mixtures. In industries like pharmaceutical, chemical, and beverage this parameter is crucial because a deviation in the concentration could affect the efficiency of the medicaments, the chemical stability, or the alcohol percentage. 


References:


[1] Concentration Measurement

[2] Units translation table for field devices 

[3] Rheonics Concentration articles

[4] Measuring Concentrations of Solutions 

[5] Baume Scale

[6] NCBI - Brix Measurement

[7] Display SME-TRD