Polarimeters with circulation thermostat temperature control

P8000-T and P8100-T

Polarimeter P8000-T with circulating thermostat PT80

Polarimeter P8000-T with circulating thermostat PT80

Polarimeter P8000-TF fully automatic sample feed

Polarimeter P8000-TF fully automatic sample feed

Polarimeter glas tube PRG-100-ET with temperature sensor PRT-T

Polarimeter glas tube PRG-100-ET with temperature sensor PRT-T

Polarimeter glas tube PRG-100-ET with temperature sensor PRT-E

Polarimeter glas tube PRG-100-ET with temperature sensor PRT-E

Polarimeter glas tube PRG-100-DT V

Polarimeter glas tube PRG-100-DT V

Quartz control plates polarimeter PQP

Quartz control plates polarimeter PQP

Key features
Key features

Polarimeters for the laboratory

The polarimeter models P8000-T and P8100-T will allow for a circulation thermostat temperature control in the range between 8 °C and 40 °C when combined with temperature controlled measurement tubes and a thermostat. That makes them suitable for high-precision measurements in quality control. Especially if a multitude of different temperature controlled measurement tubes are to be used, the P8000-T and P8100-T are the right choice. We offer a very large selection of this type of tubes.

  • Temperature measurement directly inside the sample
  • Accurate, homogeneous water bath temperature control
  • Large selection of temperature-controlled measurement tubes
  • Quick coupling system for an easy measurement tube change
  • Highest accuracy over the entire measurement range
  • Very short measurement time of approx. 1 s
  • Measurement up to an optical density of 3.0 OD
  • Intuitive operation via touch-screen display
  • Predefined scales (opt. rotation, spec. rotation, int. sugar scale, concentration)
  • Any number of freely definable scales with conversions based on tables or formulas
  • Chemical-resistant materials
  • Compliance with GMP/GLP, 21 CFR Part 11, Pharmacopeia (USP, BP, JP, Ph. Eur.), FDA, ISO, HACCP, OIML, ASTM, ICUMSA, NIST

Typical applications

The P8000-T polarimeters can be used for a variety of applications in the pharmaceutical, chemical, sugar, food and beverage industry, as well as for the production of flavors and fragrances.

  • Determination of concentrations in raw materials, preliminary, intermediate and end products
  • Purity control
  • Determination of the stereochemical composition and mutarotation
  • Monitoring of chemical processes
  • Routine analysis with high sample throughput

A comprehensive overview of typical applications with the polarimeters of the P8000 series can be found in our campus article on polarimeter applications.


Conformity with national and international standards

A big advantage of normalized measurements is the comparability of the measurement results. In many international standards and guidelines, polarimeters are recommended for specific measurement tasks as suitable measuring instruments. The requirements for the measuring devices, such as measuring 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 polarimetry.

  • Association of Analytical Communities (AOAC)
  • American Society for Testing and Materials (ASTM)
  • European Honey Commission (EHC)
  • International Commission for Uniform Methods of Sugar Analysis (ICUMSA)
  • European Pharmacopoeia (Ph. Eur.)
  • United States Pharmacopoeia (USP)

Polarimeter Standards (PDF, 83 KB)

Any questions?
Feel free to contact us, we will assist you in choosing the right polarimeter for you.


Measuring optically active substances

Many biologically important substances such as amino acids, sugars, enzymes or receptors are chiral compounds and have the ability to rotate linear-polarized light. Almost all natural amino acids rotate linearly polarized light to the left, whereas natural sugars (eg D-glucose) almost exclusively turn right. These substances have the same physical properties as density, melting point, boiling point or IR spectrum except for their optical activity. Depending on the direction of rotation, chiral substances can have very different physiological effects on living organisms. Therefore, measurement of optical purity with a polarimeter is an important quality criterion in the production of chiral drugs in the pharmaceutical industry. Due to the proportionality of the rotation value α and the concentration c, it is possible to carry out quantitative content determination of sugar solutions in the sugar processing industry (saccharimetry).

A high-quality optics, intelligent evaluation logarithms, LEDs with different wavelengths and a consistent measuring accuracy over the entire measuring range are available for the quantification and characterization of all optically active substances.

In the following table we have compiled an overview of frequent samples from our customers. Most samples were measured at standard measurement conditions (20 ° C, λ = 589 nm). Deviations are indicated. The measurements given are not specifications.

For your free download:
(All values have been compiled with best accuracy, but this information is supplied without liability.)

Polarimeter samples and their optical rotation (PDF, 122 KB)

Any questions?
Get in contact with us, we will assist you in choosing a suitable polarimeter.

Model specifications

SCALESOptical rotation [°]
Int. sugar scale [°Z]
Concentration [g/100 ml]
Spec. rotation
±259 °Z
±0.01 °Z
±0.01 °Z
0.01 °Z
LIGHT SOURCE1 LED with filter
TEMPERATURE CONTROLWith Circulation Thermostat PT31/PT80 and temperature-controlled measurement tube

Technical data polarimeters (PDF, 490 KB)

Datasheet Polarimeter measurement tubes (PDF, 819 KB)

New touch screen technology with 7.0 inch display

  • Operation is via capacitive touchscreens with fast computing unit
  • The glass surface can be operated with gloves and cleaned with solvents
  • The 18-bit colour depth delivers 262,000 colours and produces clear images
  • Glare effects in sunlight are reduced to a minimum

Higher data security with better authorisation concepts

  • From now on with specific setting of network access restrictions
  • Enhanced authentication methods with Secure Login
  • The combination of user name & password protects saved data from unauthorised access
  • Audit trail to record configuration changes
  • Possibility of data reports with own logo

Fast reliable measurement

  • Measurement up to an optical density of 3.0 OD
  • Very short measurement time of approx. 1 s – the fastest polarimeters in the world!
  • Measurement with manual measurement time input or optimised measurement time thanks to automatic stability recognition
  • Reliable temperature compensation
  • Highest accuracy over the entire measurement range
  • Complete recording of all measured data as well as system and method settings in a tamper-proof data storage
  • Documentation of all measured values of the last 999 measurements with consecutive numbering

Unlimited number of methods

  • Create any number of methods and analyse each sample using the desired parameters
  • Method parameters: scales, temperature, temperature compensation, sample supply, wavelength, tube length, limit values, comment and many more
  • Measurement modes: single, continuous or interval measurement
  • Predefined scales for optical rotation, specific rotation, sugar content and concentration
  • Any number of freely definable scales with conversions based on tables or formulas

Easy filling and cleaning

  • Suitable measurement tubes for any type of sample
  • Manual, semi-automatic or fully automatic sample supply
  • Chemical-resistant materials
  • Freely configurable cleaning procedures
  • Semi-automatic or fully automatic drying

Intelligent user administration

  • Can be activated or deactivated depending on the requirements
  • Two authorisation levels
  • Optional setup of user profiles
  • Customised settings for different users or work groups

Flexible data export

  • Print-out on serial ASCII printer
  • Print-out on network printer in PDF or GS format
  • Print-out as PDF on USB flash drive or to network share
  • Export in HTML or CSV format on USB flash drive or to network share
  • Can be connected to a keyboard, mouse, barcode scanner or external PC
  • Easy integration into existing networks (DHCP Client) or a LIMS

Polarimeter solutions for any need

  • P8000/P8100 without temperature control
  • P8000-T/P8100-T with water temperature control
  • P8000-P/P8100-P with Peltier temperature control
  • P8000-TF/P8100-TF with water temperature control and flow-through function

Compliance with global standards

  • Pharmacopoeias (USP, BP, JP, Ph. Eur.)
  • Secure Login regulates the reliability, integrity and availability of data uniquely and safely in accordance with 21-CFR Part 11

Polarimeter glass measurement tubes for water temperature control

The PRG-100-/-200-ET is an especially robust, externally temperature-controlled and versatile measurement tube. Its glass body makes it chemical-resistant, which is, for example, very important in the pharmaceutical and chemical industry where samples are often analysed in 10 % hydrochloric acid. The measurement tube is also unbreakable thanks to its stainless steel jacket.


Automation with polarimeters

Maximum efficiency and increased time savings through automation options - with our polarimeters P8000-TF and P8100-TF with their temperature-controllable measurement tubes, the entire measuring process can be carried out semi-automatically or fully automatically and without manual intervention, from sample supply to cleaning to drying.

More about automation

Any Questions?

We will be glad to help.

A.KRÜSS Optronic GmbH
Alsterdorfer Str. 276-278
22297 Hamburg | Germany

Tel. +49 40 5143 17-0
Fax +49 40 5143 17-60

E-Mail info@kruess.com