Unipol L series

PDF data sheet
  • High-performance circle polarimeter
  • Unchanged high precision
  • T-Cell “Peltier”- tubes
  • Self calibration (AWC)
  • Comply to international standards
Fully automatic digital polarimeter particularly designed for pharmaceutical and chemical applications.

NEW: Polarimeter UniPol L series now without separate electronic unit for T-Cells! All models of the UniPol L “P” series are now completely ready to be used with our peltier tubes! The other standard models (Unipol 589, UniPol 1000 and UniPol 2000) can also be easily upgraded to a Peltier version. To upgrade an existing UniPol a peltier main board has to be purchased and built into the standard UniPol by a technician at the costumer’s site.


The entire measuring range of ± 360° is divided in several measuring ranges which can easy be selected by the menu.

The user friendly menu structure of the instrument is easily operated with the splash-proof alphanumerical keyboard. Software design close to the practise enables the user to input sample ID-numbers, calculate statistical evaluation and configure user defined printout of the measuring results. The measuring values are shown on the large LCD display.

The standard model is equipped with the 589 nm wavelength. Other wavelengths  on request.

Various polarimeter tubes are available for different applications. With the use of micro tubes smallest sample volumes are sufficient. The polarimeters Unipol L series are equipped with plug in connector for the temperature sensor of the SCHMIDT + HAENSCH polarimetric tubes. If polarimeter tubes or quartz control plates with integrated temperature sensor are used the current sample or quartz temperature is indicated at the display. All models of Unipol L series are available as so-called “P version“ for using polarimeter tubes fitted with Peltier elements.

The resolution and precision of Unipol L 1000 and L 2000 polarimeters are higher than the standard model Unipol L. They meets all requirement of quality laboratories. Additional features are:

  • Automatic adjustment of beam diameter, necessary for the use of micro tubes
  • AWC (Automatic Wavelength Control) – automatic calibration routine

The resolution of all Unipol L models is in complete conformity to the European and American Pharmacopeia. GLP/GMP conform data can be transferred to printer or PC. In addition to 1 parallel and 2 serial interfaces these polarimeters are equipped with PS2 interface for connecting a barcode reader or keyboard.

Polarimeter Accessories:

  • NEW: T-Cell polarimeter tubes with an integrated electronic Peltier-system for highly accurate sample temperature adjustment without the need for an external water circulator T-Cell polarimeter tubes with an integrated electronic Peltier-system
  • NEW: Chemically resistant polarimeter tubes
  • NEW: Polarimeter tubes with self-sealing coupling for quick and safe connection/disconnection of water circulators
  • NEW: Triple Quartz Control Plates (TQCP’s)


As the interference filters, which are used in circle polarimeters, suffer from age- and environment depending alteration, it might be necessary to check the wavelength precision periodically and to readjust the wavelength in case it’s out of range. This can be done with sucrose solutions or quartz control plates since the optical properties of sucrose solution and quartz are almost identical. Sucrose solutions are not very stable and have to be renewed regularly. Checking a polarimeter by a quartz plate is a much more reliable method.

Quartz control plates are long-term stable examination standards for polarimeter. The sample room of SCHMIDT + HAENSCH polarimeter permits the vertical movement of quartz control plates as well as the free rotation (±360°) around their own axis. Only by a rotation it is possible to check if the plates are mounted without strain and permit an examination of the polarimeter according to processing regulations of international standards like ICUMSA and OIML.

In conjunction with the SCHMIDT + HAENSCH Software AQUISYS 2008 all requirements of CFR21 Part 11 will be performed.

AQUISYS 2008 software is CFR21 Part 11 compliant for SCHMIDT + HAENSCH’s instruments.

  • Audit Trail function (history logging)
  • Report generation
  • Electronic signature
  • Encrypted electronic data storage and archiving
  • Data transfer to Excel


Polarimetric concentration and purity analysis in food, pharmaceutical, cosmetic and chemical industry.


Main specifications

Brand Unipol L, Unipol L 1000, Unipol L 2000
Measurement scale °Optical Rotation / °Specific Rotation / °Z International Sugar Scale / % Concentration / freely definable scales
Measuring range ± 360° / ± 259°Z
Resolution Unipol L: 0,01° / 0,02°Z
Unipol L 1000: 0,001° / 0,01°Z
Unipol L 2000: 0,001° / 0,01°Z
Precision Unipol L: ±0,01° / ±0,03°Z
Unipol L 1000: ±0,005° / ±0,02°Z
Unipol L 2000: ±0,005° / ±0,02°Z**
Reproducibility Unipol L: 0,01° / 0,03°Z
Unipol L 1000: 0,005° / 0,02°Z
Unipol L 2000: 0,005° / 0,02°Z
Sensitivity up to OD 2
Response time approx. 6 - 8 sec
Wavelength one fixed (589 nm) / one fixed (589 nm) / 2 fixed (405 and 589 nm) others on request
Measurement mode discontinuous


Temperature measurement If temperature sensor with appropriate tubes is used / T-Cell Peltier tubes (NEW: with integrated Peltier-control for T-Cell Polarimeter tubes)
Temperature control sample with appropriate tubes via external water bath / Peltier temperature controlled sample tubes (NEW: with integrated Peltier-control for T-Cell Polarimeter tubes)
Temperature control range depends on the water bath / 18 - 40 °C (T-Cell)
Resolution depends on the water bath / 0.01 °C (T-Cell)
Precision depends on the water bath / ± 0.03 °C (T-Cell)
Reproducibility depends on the water bath / 0.05 °C (T-Cell)

Additional information

Measuring tubes up to 200 mm length
Ambient temperature +10 - +40 °C
Light source LED
Display Graphics-LCD 16 x 16 characters
Operation Alpha numerical keyboard, 20 buttons inclusive function keys
Interfaces/communication 2 serial RS-232, 1 parallel, USB* und Ethernet*

Standard models

Unipol L589 / Unipol L589 P (Peltier), 589 nm
Unipol L546 / Unipol L546 P, 546 nm
Unipol L365 / Unipol L365 P, 365 nm
Unipol L1000 / Unipol L1000 P, 589 nm
Unipol L2000 / Unipol L2000 P, 405 und 589 nm
other wavelengths on request


Standards*** International Pharmacopoea, ASTM, ICUMSA and others

* optional

** Precision refers to physical standard conditions

*** Specific standard depends on application and the country it is used in. Details on request.

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