Analytik has introduced the DSR-L automatic refractometer from Schmidt and Haensch.
The automatic refractometer measures refractive index (RI) at multiple wavelengths.
The use of discrete light-emitting diodes (LEDs) makes it possible to implement any combination of customer-specified wavelengths, allowing quasi-spectral measurements in near real time.
The DSR-L is suitable for both research-and-development and quality-control purposes.
It is ideal for measuring the RI dispersion of proteins, viscous materials, lenses, glass, thin film and polymers and can be used to test product purity, characterise optical materials, identify counterfeits and analyse quantities of dissolved solids, such as sugar, glycol and fats.
By precisely measuring samples at seven separate wavelengths (400nm, 435.8nm, 486.1nm, 546.1nm, 589.3nm, 656.3nm and 706.9nm), the DSR-L provides fingerprint-like data.
There are many solutions that are chemically different but that display comparable RI values at the traditional 589.3nm wavelength; however, as the DSR-L can measure RI at multiple wavelengths, key differences can be obtained from otherwise similar samples.
The electronic Peltier device controls temperatures from +18C to +30C and eliminates the need for an external water bath or thermostat.
With an accuracy of +/-0.01C, a temperature is set and the automatic refractometer quickly heats or cools to the target temperature.
The DSR-L also features a long-lasting LED light source (100,000 hours), a linear high-resolution charge-coupled-device sensor, menu-driven backlit LCD displays, four user profiles, password protection, printer and data ports and optional USB ports.
The included software package and the RS-232C cable make it simple to connect the DSR-L to computers for the collection of measurement data or for remote operation with the full command of all functions.
As new software versions have now been released, the instrument can also receive flash updates.
The DSR-L is suitable for the ASTM D 1747 Standard Test Method for Refractive Index of Viscous Materials and the ASTM D 1218 Standard Test Method for Refractive Index and Refractive Dispersion of Hydrocarbon Liquids.
