Density Meter DS7700 / DS7800

SKU: DS7700 / DS7800

The right decision for low sample volumes

For manual sample delivery via syringe, we offer two different density meter sets: For low sample volumes and high viscosity samples, we recommend Set 1 and for highly viscous and aggressive samples Set 2. While the sample is added, you can check for air bubbles by looking through the inspection glass. A suitable medium is injected for the cleaning until all sample residues have been dissolved and removed. The drying unit will then remove all liquid residues.

  • Sample supply and cleaning via syringe
  • 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, pharmakopoeias (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 analyze 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

Compliance with national and international standards

A big advantage of normalized measurements is the comparability of the measurement results. Many international standards and guidelines recommend density meters for specific measuring tasks as suitable measuring instruments. The requirements for the measuring devices, such as measurement accuracy and measuring temperature, are dependent on the respective measuring task and defined in each standard. We have compiled for you an overview of all known standards and guidelines, which refer to the density measurement.

  • American Society for Testing and Materials (ASTM)
  • Hazard Analysis and Critical Control Points (HACCP)
  • International Organization of Legal Metrology (OIML)
  • National Institute of Standards and Technology (NIST)
  • International Commission on Uniform Methods of Sugar Analysis (ICUMSA)
  • European Pharmacopoeia (Ph. Eur.)
  • United States Pharmacopeia (USP)

▶︎  DENSITY METER STANDARDS

Density measurement of liquids, emulsions and pastes

Thanks to the chemical-resistant sample carrying parts made of borosilicate glass and PTFE, our density meters are suitable for almost all liquids, emulsions and pastes.

The sample is administered manually via syringe, semi-automatically via peristaltic pump or fully automatically via autosampler. High-viscosity samples are usually supplied by syringe, low to light viscous can also be supplied by means of peristaltic pump and autosampler. For every method of operation and every kind of sample, we have suitable density meter sets available that contain all the necessary accessories, from tubing sets to filling spouts and adapters to splash guards for the manual supply of aggressive substances.

In the following table we have compiled an overview of typical samples from our customers. Most samples were measured with an measurement accuracy of 3 decimal places and at 20 ° C, deviations are indicated. The listed readings are not specifications.

▶︎  SAMPLE DENSITY

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 oC

TEMPERATURE RANGE

10-40 oC

ACCURACY OF TEMPERATURE CONTROL

±0.02 oC

METHODS

A practically unlimited number of methods can be set

ADJUSTMENT

Automatic (menu-driven), with dried air and distilled water

CONTENT SET 1
DS7700-1

DS7800-1

Drying unit with 2/2-way valve

Tygon tube set for use with Luer syringe: Air tube, waste tube, tube connections Luer

Luer nozzle

Luer syringes

PE waste container with lid

CONTENT SET 2
DS7700-2

DS7800-2

Drying unit with 2/2-way valve

Tygon tube set for use with Luew syringe: Air tube, waste tube, tube connections Luer

PTFE tube set for use with Luer syringe: Drain tube, waste tube PEEK hollow screws

PTFE splash guard

Adaptor Olive/UNFa for sample discharge through Tygon tube via UNF nozzle

Luer, UNF muzzle

Luer syringes

PE waster container with lid