Digital Polarimeter 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.

Specifications

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.
Sugar Scale Range : ± 259°Z
Resolution : ± 0.01°Z
Repeatability : ± 0.1°Z
Accuracy : ± 0.1°Z
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

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.

Spectroscopic Polarimeter Model No: HO-ASP-500

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 in our polarimeters to achieve high resolution and repeatability.

In HO-ASP-500 a halogen lamp with high spectral resolution monochromator is incorporated as light source. The measurements can be performed over wide range of analytical wavelengths from VIS to NIR by using Tungsten halogen lamp. Also the wavelength accuracy is better compared to the normal interference filters.

Our high quality optical system improves the light collection and flexibility of the system. All adjustments on the device are made via an easy to use touch screen. The sample parameters can be customized for different applications.

Holmarc offers full line of accessories for Polarimeter. Temperature control and temperature compensation can be incorporated to eliminate the variation of results with temperature. Wide range of polarimeter sample cells are available. Center cup tubes and continuous flow through cells can also be supplied for custom applications.

Specifications

Light source : Tungsten Halogen Lamp
Detector : PMT
Monochromator : Czerny-Turner
Grating : Blazed Holographic
Wavelength range : VIS-NIR
Measuring range : ± 180° (Switchable)
Resolution : 0.001 Deg.
Repeatability : ± 0.03 Deg.
Accuracy : ±0.03 Deg.
Sugar Scale Range : ± 259°Z
Resolution : ± 0.1°Z
Repeatability : ± 0.1°Z
Accuracy : ± 0.1°Z
Measuring modes : Optical Rotation, Specific rotation,
Concentration, Optical Purity & Sugar Scale.
Sample chamber : Accepts sample cells up to 200mm Length
Temperature range : 20 – 100 Deg Celsius (optional)
Temperature accuracy : +/- 0.5% at 100 Deg Celsius
Principle : Symmetric angular oscillation optical null principle.
User interface : 5.7 inch TFT color display with
touch screen andPCSoftware