Density Meters for Fully 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 fully automatic sample supply

Fully automatic execution of the entire measuring process

Working environments involving a high sample throughput require flexible, powerful and robust solutions for a fully automatic execution of the entire process from the sample supply to the cleaning and drying. Our AS80 and AS90 autosamplers meet these high requirements. Together with the peristaltic pump DS7070, they allow for an unsupervised measurement of up to 89 samples. For a high sample volume of aggressive samples we recommend Set 5.

  • Suitable for low-viscous to slightly viscous and aggressive samples
  • Fully automatic sample supply and cleaning
  • Fully automatic drying
  • Individual measurement methods and cleaning procedures as well as sampler templates possible
  • Easy and fast to install autosampler
  • 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
TEMP. 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 4
DS7700-4/DS7800-4 Drying unit with 3/2-way valve DS7060
Peristaltic pump
Autosampler AS80 or AS90, each with 1 of 2 sample plate variants and matching polypropylene or glass vials
Tygon tube set for use with drying unit DS7060: suction tube, drain tube, air tube, waste tube, tube connections Luer
Tube set for peristaltic pump DS7070: TPE pump tubes, PTFE tube connections (olive)
Adaptor olive/UNFa for connecting the Tygon tubes to the drying unit DS7060
Adaptor UNFi/Luer for the sample supply with autosampler AS80 or AS90 via Luer nozzle
Luer nozzles
Luer syringes
PE waste container with lid
CONTENT SET 5
DS7700-5/DS7800-5 Drying unit with 3/2-way valve DS7060
Peristaltic pump
Autosampler AS80 or AS90, each with 1 of 2 sample plate variants and matching polypropylene or glass vials
PTFE tube set for use with drying unit DS7060: Suction tube, drain tube, connecting tube, waste tube,PEEK hollow screws
Tube set for peristaltic pump DS7070: TPE pump tubes, PTFE tube connections UNF
Adaptor Luer/UNFa for the sample supply with syringe via UNF nozzle
UNF nozzles
Luer syringes
PE waste container with lid

 


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