Automatic Refractometer measures RI at 7 wavelengths.

Press Release Summary:

Able to measure samples at 7 separate wavelengths from 400-706.9 nm, Schmidt+Haensch's DSR-L can determine refractive index (RI) dispersion of carbohydrates, viscous materials, glass, thin film, and polymers. Electronic Peltier device controls temperatures from +18 to +30°C with accuracy of ±0.01°C and eliminates need for external water bath or thermostat. Other components include 100,000 hr-rated LED light source, linear Hi-Res CCD sensor, and menu-driven backlit LCD displays.

Original Press Release:

Automatic Refractometer Measures Refractive Index at 7 Wavelengths

Kirkland, WA, February 10, 2009 ­ VEE GEE Scientific announces the DSR-L from Schmidt+Haensch as the world's first automatic refractometer to measure refractive index at multiple wavelengths. The DSR-L is ideal for measuring the refractive index dispersion of carbohydrates, viscous materials, glass, thin film, and polymers and can be used to test product purity, characterize optical materials, identify samples, and analyze quantities of dissolved solids like sugar, glycol, fat, and Oechsle.

By accurately measuring samples at seven separate wavelengths (400nm, 435.8nm, 486.1nm, 546.1nm, 589.3nm, 656.3nm, & 706.9nm), the DSR-L effectively takes refractive index measurements to the "fingerprinting" level. Many chemically different solutions may exhibit similar refractive index values at the traditional 589.3nm (sodium) wavelength. Because the DSR-L can measure refractive index at multiple wavelengths, key differences can be obtained from otherwise similar samples.

Optionally, the DSR-L has the capability of expanding the optical wavelength range from 350nm up to 1000nm.

The electronic Peltier device controls temperatures from +18 to +30°C and eliminates the need for an external water bath or thermostat. With accuracy of ±0.01°C, a temperature is easily 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), linear high-resolution CCD sensor, menu-driven backlit LCD displays, 4 user profiles, password protection, printer and data ports, & optional USB ports.

The included software package and RS-232C cable make it easy to connect the DSR-L to computers for collection of measurement data or for remote operation with full command of all functions. As new software versions are released, the instrument can also receive flash updates.

The DSR-L is suitable for ASTM D 1747 Standard Test Method for Refractive Index of Viscous Materials and ASTM D 1218 Standard Test Method for Refractive Index and Refractive Dispersion of Hydrocarbon Liquids.

Schmidt +Haensch has been manufacturing precision opto-electronic instruments since 1864. All S+H instruments are manufactured in Germany. VEE GEE Scientific is proud to be the exclusive North American wholesale distributor of Schmidt+Haensch instruments, including automatic refractometers, polarimeters, and colorimeters. Please contact VEE GEE Scientific for pricing information or call 800.423.8842 to speak with a sales representative.

About VEE GEE Scientific, Inc.
VEE GEE Scientific is a wholesale manufacturer and supplier of scientific supplies and equipment. With its international network of dealers, VEE GEE equips scientists and technicians in a range of industries with cost-effective products that meet or exceed the performance of similar, higher-priced instruments. VEE GEE integrates quality brand names like VanGuard Microscopes and VEE GEE Refractometers with personal and professional service.

Kaely Culbertson, Sales & Marketing Account Representative,

Company Information:
VEE GEE Scientific, Inc.
13600 N.E. 126th Place, Suite A
Kirkland, WA 98034
Phone: 425-823-4518
Fax: 425-820-9826

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