Automatic Polarimeter – AUTOPOL I

///Automatic Polarimeter – AUTOPOL I
  • Automatic Polarimeter – AUTOPOL I

Automatic Polarimeter – AUTOPOL I

The AUTOPOL I is Rudolph’s most economical automatic polarimeter designed for education and less demanding applications where the budget is critical, but quality is still important.

Product Description

Autopol I Polarimeter Standard Features:

  • 0.01° Arc Accuracy.
  • 589nm fixed wavelength.
  • Built in thermoprobe for temperature measurement.
  • Windows Embedded 7 for direct connection to the network server and flexible USB Printing.

Optional Features:

  • TempTrol™ Automatic Electronic Heating & Cooling 15° – 40°C ±0.2°
  • AP Accuracy Option: 0.004° Arc Optical Rotation
  • AP Resolution Option: 0.01, 0.001° Arc Selectable.

Quality Components

Rudolph manufactures its entry-level automatic polarimeter with the same high quality optics as its more expensive instruments. While other manufacturers in this price range use Polaroid Plastic Dichroic Sheet Polarizers, Rudolph does not. Instead, Rudolph uses the same high quality Glan Thompson Calcite Polarizers used in its high accuracy models (Figure A).

Why are high quality polarizing prisms important? Because prisms are two of the most critical optical components in the polarimeter. Polaroid prisms are made of a polymeric plastic where the molecules are stretched and oriented in a specific direction so as to linearly polarize light. These types of plastic sheet polarizers are very inexpensive ($50.00 USD) and are vulnerable to heat, warp over time, deteriorate from moisture, and also have greater light absorption than Calcite Polarizers. In many cases, the plastic polarizers must be replaced in 3 – 5 years. Glan Thompson Calcite Polarizers are comprised of a carbon crystalline structure similar to diamond and have excellent light transmission characteristics. The quality of these prisms is so good, Rudolph guarantees its prisms over the life of the polarimeter.

Polarimeter Sample Temperature

As shown in Figure B, the Autopol I comes with a Temperature Probe so that sample temperature can be displayed and printed. However, if your product requires Temperature Control, then the Autopol I will most likely not be accurate enough for this type of sample, as is the case for 98% of pharmaceutical applications where a Certificate of Analysis must be issued.

Optional Accessories


Polarimeter Accessories

The Autopol I is a Single Wavelength Instrument operating at 589nm. The 589nm wavelength is often referred to as the Sodium D-Line. The Autopol I includes a 100mm or 200mm glass sample cell. A full range of optional Polarimeter accessories are available

Autopol I – Specifications

AUTOPOL I Polarimeter Specifications
Measuring Mode Optical Rotation
Specific Rotation
Specific Rotation Plus Concentration
User Defined Scale
Sugar Degrees
Measuring Scale Degrees Arc Optical Rotation
Resolution 0.01° Arc Optical Rotation
0.01% Concentration
0.01 Specific Rotation
Accuracy 0.01° Arc Optical Rotation
0.03°Z (ISS) Sugar Degrees
AP Acccuracy Option Resolution: 0.001° Arc Optical Rotation
Reproducibility: 0.002° Arc Optical Rotation
Accuracy ±0.004° Arc Optical Rotation
AP Resolution Option AP Selectable Resolution: 0.01, 0.001° Arc
Reproducibility 0.01° Arc Optical Rotation
Measuring Range ± 89° Arc Optical Rotation
± 999.99° Arc Specific Rotation
0-99.9% Concentration
Prism Glan Thompson Calcite
Optical Wavelengths 589nms
Wavelength Selection Fixed
21 CFR Part 11 Compliant Software Yes with optional PC Software
Temperature Control By external water bath (Standard)
TempTrol™ Automatic Electronic Heating & Cooling 15° – 40°C
±0.2° (Optional)
Temp. Probe Measurement Range 10° – 100°C
Temp. Probe Measurement Accuracy ±0.1°C
Measurement Time 5 measurements in less than 25 seconds (avg.)
Light Source Tungsten-halogen 6V, 20W, avg. 2,000 hour life
Sample Chamber Accepts sample tubes up to 200mm
Data Storage 8 GB Non-removable Compact Flash
Communication Interface 3- USB Ports,
2- RS232 serial ports,
Ethernet Port for Network Communication
Calibration Automatic calibration via touch screen
Operating System Windows 7 Embedded
Polarimeter Display 8 inch Color, 800 x 600 pixel resolution with 400 nits of brightness.
User Interface Touchscreen
Automatic Sensitivity Control Measures samples with transmittance as low as 0.01% (up to O.D. 4.0)
Input Power 100 – 240V, 50/60Hz
Operation Dimensions 24.3″W x 12.7″H x 17.5″D,
617mm W x 323mm H x 432mm D
Shipping Dimensions 31″W x 28″H x 26″D,
787mm W x 711mm H x 660mm D
Operating Weight 42 lbs. (19.05 kg)
Shipping Weight 72 lbs. (32.6 kg)
Calendar/Clock Functions Battery-backed clock; time and date sent to computer and printer


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