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Digital Polarimeter Print
Model No: HO-DP-500

Holmarc manufactures automatic digital polarimeters for industry and research with robust performance and efficiency. Symmetric angular oscillation optical null technique by Faraday Modulation is implemented in our polarimeters to achieve high resolution and repeatability. Operation is simple: place the sample filled tube in the automatic Polarimeter and press READ button. Measurement is displayed on the soft color LCD display of the instrument.

The Polarimeter is used for determining the optical rotation of substances. By measuring optical rotation, the concentration, content, purity etc of certain substances can be found out. Therefore, the Polarimeter has become one of the most useful instruments in laboratories of sugar industry, pharmaceutical industry, oil refining, foodstuff industry, chemical industry, universities and scientific research field.

Major modules in our Polarimeter include light source, Interference filter, polarizer, faraday modulator, sample chamber, analyzer and Detector.

Unpolarized light from light source (Sodium vapour lamp) passes through an interference filter and polarizer so that a fixed wavelength polarized light comes out. This polarized light enters the Faraday Modulator and then passes through the sample cell. The modulated light which passed through the sample cell enters a second polarizer, known as the “Analyzer,” which detects the angle of rotation. Finally, the light falls on a photomultiplier tube which converts the light intensity to an electric signal.
  Light source : Sodium vapor Lamp
  Optical wavelength : 589 nm (Na D-line)
  Measuring range : ± 180° (Switchable)
  Resolution : 0.001 Deg.
  Repeatability : ± 0.03 Deg.
  Accuracy : ± 0.03 Deg.
  Measuring modes : Optical Rotation, Specific rotation, Concentration,
Optical Purity & Sugar Scale.
  Sample chamber : Accepts sample cells up to 200mm Length
  Principle : Symmetric angular oscillation optical null principle.
  User interface : 5.7 inch Graphical LCD & Keyboard and PC Software
  PC Interface : RS232
  Calibration : Automatic calibration by push button
  Detector : PMT
  Dimension : 625 x 335 x 270 mm h
  Weight : 30 Kg (Approx.)
  Power requirement : AC100- 230 V 50 Hz
Spectroscopic Polarimeter
Holmarc manufactures high quality automatic polarimeters for industry and research with robust performance and efficiency. Symmetric angular oscillation optical null technique by Faraday Modulation is implemented ...
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Optical rotation is directly proportional to path length; the longer the tube, the greater the overall accuracy. Holmarc’s Polarimeter accepts tubes up to 200mm long. A 200mm sample tube offers twice the sensitivity when measuring the same solution in a 100mm sample tube. Different types of sample tubes are available up to 200mm length.

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