Wilten Instruments has a wide range of instruments. Because of the variety of options on some products we are not able to mention all of them on our website. Complete information is available on demand.
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Home  /  Polarimeters  /  ADP600

Multi-Wavelength Polarimeters

Temperature controlled polarimeters are designed to meet the needs of the most demanding applications within the chemical, pharmaceutical & food sectors

Available as single, dual and multiple wavelength derivatives not only covering the visible spectrum, the new ADP600 Series of Peltier temperature controlled polarimeters are capable of measuring optical rotation to four decimal places in the highly sensitive ultra-violet region. This capability makes the instrument particularly suited for use by scientists wishing to measure chiral compounds and other optically active substances in the chemical, pharmaceutical and food sectors as well as for use in academic research.

Sample Tubes & Peltier Control

Peltier technology is intelligently applied to the sample chamber of the new polarimeters so that measurement can be accurately made without the need of an external device such as a waterbath to control sample temperature. The ADP600 Series Polarimeters have two preset operating temperatures being 20 and 25 °C in accordance with European and United States Pharmacopoeia respectively and other user temperatures between 20 and 30°C may be configured via the instrument user interface.ADP600 Series Polarimeters accept standard glass or special low volume leur taper polarimeter tubes facilitating measurement across optical path lengths between 5 and 200m with tube diameters from 3 to 8mm being readable. Optional lids may be easily be fitted to the ADP600 Series Polarimeters, facilitating sample tube entry and exit.

Touch-screen Display & Methods

Integral to operational simplicity is the full color, high definition, touch-screen graphical user interface. A menu structure featuring a METHODS system makes for one-touch calibration and instrument configuration; especially where the specific rotation of a number of samples is being analysed over a wide range of concentrations, path lengths, temperatures and wavelengths. A “Mean Method” is also available, allowing a number of readings to be taken from a production batch with the mean being calculated and recorded once the experiment has been completed. The Mean Method is ideal for pharmaceutical applications where compliance with pharmacopoeia is required.

The METHODS system is also very similar to that of the wide ranging RFM900 Series of high accuracy Peltier controlled refractometers that are in common use throughout the flavours, fragrance, chemical and pharmaceutical industries.


ADP610 – single wavelength polarimeter 589 nm
ADP620 – dual wavelength polarimeter 546 & 589 nm
ADP622 – dual wavelength polarimeter 365 & 589 nm
ADP640 – multiple wavelength polarimeter 405, 436, 546 & 589 nm
ADP650-  multiple wavelength polarimeter 365, 405, 436, 546 & 589 nm
ADP660 – multiple wavelength polarimeter 325, 365, 405, 436, 546 & 589 nm


  • Simple Methods system
  • Accepts standard & low volume sample tubes
  • Supports FDA regulation 21 CFR Part 11
  • US/EP/BP/JP compliant


Range (°A) ± 89 (-355 to +355 via Method selection)
Resolution (°A) 0,0001
Accuracy (°A) ± 0.003 (@546 & 589 nm) / ± 0.005 (@325, 365, 405 & 436 nm)
Temperature Range 15-35°C
Temperature Control / Accuracy Peltier / ± 0.2°C
Temperature Compensation None, sugar, quartz, user defined
Optical Density Range 0.0 a 3.0 OD
Methods Specific Rotation, % Concentration, % Invert Sugar, % Inversion (A-B)
Temperature Set Points 20 & 25 °C (variable between 20-30 °C via Method)
Reading Time 15-60 seconds @ 546/589nm and 20/20°C (instrument/sample)
Tube Length 5-200 mm
Tube Diameter 3-8 mm
User Interface High Definition 7.4” touch-screen colour display
Light Source UV/Vis lamp (6V, 2A >1000hrs) and narrow band pass filter(s)
Interfaces 3 x USB (A), 1 x USB (B), 1 x Ethernet, 1 x Serial (RS232)
Power Supply 100-250V~, 50-60 Hz. <6A