Density meters for Semi-automatic Sample Supply

A.KRÜSS density meters use the U-tube oscillator method and enable simple, fast and precise measurements of all flowable media. Due to the small footprint, an intelligent user interface as well as the conformity with many standards, our density meters are optimally tailored to a modern laboratory world.

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Density meters for semi-automatic sample supply

High efficiency and special suitability for hazardous substances

In case of low-viscous to slightly viscous samples, it is possible to perform a semi-automatic sample supply and cleaning of the U-tube oscillator using a peristaltic pump. This means higher efficiency and more safety if aggressive or harmful substances are analysed. It also improves the reproducibilityof the measurement results.

  • Drying unit and peristaltic pump with high chemical resistance
  • Intuitive operation via touch-screen display
  • Easy, menu-driven adjustment
  • Pre-defined scales such as density, relative density, brix, alcohol and sulfuric acid concentration
  • Compliance with GMP/GLP, 21 CFR Part 11, pharmacopoeias (USP, BP, JP, Ph. Eur.), FDA, ISO, HACCP, OIML, ASTM, ICUMSA, NIST

 

Typical applications

A comprehensive quality assurance covering the entire production
process is a must in any industrial sector. Density measurements are
frequently used for this purpose, especially in the pharmaceutical,
chemical, petrochemical as well as the food and beverage industry.
They allow the manufacturer to analyse raw materials, semi-finished
and finished products as well as the manufacturing steps in terms of a
number of factors.

Density can be used to identify substances, to determine their quality
or purity and to measure their concentration in binary or quasi-binary
mixtures. Substance conversions and reaction dynamics can also be
inferred from it. In combination with other methods such as
refractometry that measures the refractive index of substances, the
density measurement allows you to make precise statements about
the quality of each step of the production process.

Density meters based on the oscillating U-tube method are
characterized by high ease of use and are therefore used in particular
for continuous density measurement and for rapid routine
measurements with larger numbers of samples in laboratories.

More information about typical applications of density meters can be
found in our campus article about density meters Fields of application.

 

Model specifications

DS7700 DS7800
MEASUREMENT DATA
SCALES Density [g/cm³]
Relative Density
Brix [%Brix]
Concentration of alcohol [vol%]
Concentration of sulphuric acid [wt%]
User-defined
MEASUREMENT RANGE 0–3 g/cm³
MEASUREMENT ACCURACY ±0.001 g/cm³ ±0.0001 g/cm³
MEASUREMENT PERIOD Typically 1–3 minutes including temperature control
SAMPLE VOLUME IN CASE OF MANUAL INJECTION 0.9 ml
AMBIENT TEMPERATURE 10–40 °C
TEMPERATURE CONTROL RANGE 10–40 °C
TEMPERATURE MEASUREMENT ACCURACY ±0.02 °C
METHODS A practically unlimited number of methods can be set
ADJUSTMENT Automatic (menu-driven), with dried air and distilled water
CONTENT SET 3
DS7700-3
DS7800-3
Drying unit with 3/2-way valve DS7060
Peristaltic pump
Tygon tube set for use with drying unit: Suction tube, drain tube, air tube, waste tube, tube connections Luer
Tube set for peristaltic pump: TPE pump tubes, PTFE tube connections (olive),
Luer nozzles
Luer syringes
PE waste container with lid


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