www.davidson.com.au - Schmidt + Haensch Polarimeters & Automation Systems

Digital, fully automatic spectral refractometer DSR-λ
Multi wavelength digital refractometer for dispersion measurements
Electronic unit separated from the stainless steel measuring unit
Dispersion measurement at 7 wavelengths over the full visible range
A sample volume of 0,3 ml is sufficient for measuring
The refractometer is equipped with a Peltier thermostat (no external water bath/thermostat necessary)
Applications:
Research and development, where the exact knowledge of material properties is of great importance
Medical research (plastic lenses, contact lenses) and in communication technology (polymer materials, special optical liquids and glues)
In the petrochemical industry DSR-λ can perform valuable services in scientific research and standard ASTM measurements

The Digital Multiple Wavelength Refractometer of SCHMIDT+HAENSCH is based on CCD-sensor detection of the critical angle of total reflection. This is done sequentially for all LEDs (colours) and displayed as refractive indices according to these wavelengths. SCHMIDT+HAENSCH has the necessary data basis for calibration of such an instrument through research work performed at its premises in Berlin.

The measurement principle of DSR-λ relies on a complete refractive index measurement at visible wavelengths, which is also sensitive to absorption, leading to a full optical characterisation of the measured substance. For example measuring a fruit juice will not only determine the sugar content but also provide valuable information on colour and turbidity.

The measuring principle of the DSR-λ is similar to DNA analysis giving unique fingerprint-like data for a particular product. Using this fingerprinting characterisation; high quality products like wine, perfumes, alcoholic beverages etc. can easily identified along with possible forgeries.