VEE GEE Scientific, Inc. - Item # 45201, DSR-λ
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Item # 45201 DSR-λ



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Item Name - 45201

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The DSR-λ Multiple Wavelength Automatic Refractometer from Schmidt+Haensch is the world’s first instrument to offer multiple wavelength measurement of refractive index at the digital, automatic level.

Refractometers measure the critical angle of total reflection and calculate the refractive index from this value. The R.I. of a substance depends on the wavelength of light and usually increases at smaller wavelengths. For a better characterization of this behavior, Ernst Abbe introduced in the late 19th century what became known as the Abbe Number; it’s an arithmetically dimensionless value calculated from measured refractive indices at 486.1, 589.3, and 656.3nm.

In modern times this formula isn’t used as frequently, since the development of high-accurate refractometers made it possible to measure R.I. differences at a resolution of 0.00001. However, information regarding R.I. values at other wavelengths is lost. By accurately measuring samples at 7 separate wavelengths, the DSR-λ effectively takes R.I. measurements to the “fingerprinting” level. Many chemically different solutions may exhibit similar R.I. values at the traditional 589.3nm (sodium) wavelength. However, when a spectral-analysis takes place at the R.I. level, the key differences can be obtained from otherwise similar samples.

Electronic Peltier temperature control (+18 to +30°C) comes standard on the DSR-λ to deliver the highest level of precision for R.I. testing. With accuracy of ±0.01°C, a temperature is easily set and the refractometer quickly heats or cools to the target level before conducting measurements. The DSR-λ 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 very easy to connect the DSR-λ to computers for collection of measurement data or for remote operation with full command of all functions. As new software versions are released, the instruments can also receive flash updates.




 Specifications  Applications & Markets  

Measuring Range - RI

1.33200 - 1.70000 (@589 nm)

Resolution - RI

0.00001

Accuracy - RI

±0.0001

Optical Wavelength

400nm, 435.8nm, 486.1nm, 546.1nm, 589.3nm, 656.3nm, & 706.9nm

Custom Optical Wavelengths

Available On Request

Measuring Light Source

LED

Sensor

Linear Hi-Res CCD

Prism

Synthetic Sapphire (YAG Optional)

Prism Sealant

Viton®

Prism Assembly Insert

N/A

Stage

Stainless Steel

Working Temperature

+18 to +30°C (Custom Temperature Ranges Available)

Ambient Temperature

+10 to +40°C

Temperature Correction Range

+18 to +30°C

Temperature Sensor Accuracy

±0.03°C

Temperature Control

Electronic Peltier

Temperature Control Stability

±0.01°C

Sample Quantity

>2.0mL

Zero Calibration Liquid

Distilled Water

Custom Calibration Liquid

Liquid Standard

Calibration History

Yes

Display

LCD, 16x16 Characters

Keypad

20-Key Alphanumeric

Password Protection

Yes

Languages

English & German

Printer Interface

Centronics (Parallel)

Computer Port

RS-232C

USB Port

Optional

Programmable Scales

10

Power Requirements

90-240V AC, 50/60Hz

Power Supply

15V DC

Dimensions

Control: 290 x 220 x 120mm
Sensor: 200 x 160 x 140mm

Weight

Control: 3.0 kg
Sensor: 4.5 kg

Manufactured In

Germany

Suggested List Price Each

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