Automatic Polarimeter – AUTOPOL II

///Automatic Polarimeter – AUTOPOL II
  • Automatic Polarimeter – AUTOPOL II

Automatic Polarimeter – AUTOPOL II

The AUTOPOL II is designed as a general purpose automatic polarimeter for budget focused Contract Laboratories, Food Laboratories, and College Chemistry Laboratories. Great price yet packed with features and Quality! The Autopol II offers the same standard and optional features as the Autopol I but allows greater wavelength flexibility with 589nm and 546nm standard wavelengths and optional 365nm, 405nm, 436nm, 578nm, and 633nm available.

Product Description

Autopol II Polarimeter Standard Features:

  • 0.01° Arc Accuracy.
  • 589nm and 546nm wavelengths. (A total of 2-4 wavelengths may be ordered initially or as needed)
  • 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°
  • 365nm, 405nm, 436nm, 578nm, and 633nm wavelengths. (A total of 2-4 wavelengths may be ordered initially or as needed)
  • AP Accuracy Option: 0.004° Arc Optical Rotation
  • AP Resolution Option: 0.01, 0.001° Arc Selectable.

Quality Components

Rudolph manufactures its entry-level 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 low price ($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 Monitoring

As shown in Figure B, the Autopol II comes with a Temperature Probe so that sample temperature can be displayed and printed. However, if your product requires Temperature Control, then the Autopol II 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.

Wavelengths and Polarimeter Accessories

The Autopol II comes with two built-in wavelengths that are selectable via the touch screen: 589nm (often referred to as the Sodium D-Line) and 546nm. Optional wavelengths of 365nm, 405nm, 436nm, 578nm, and 633nm are available. The Autopol II also includes the Standard Polarimeter accessories Package shown in Figure C or you can upgrade to the Calibration Package shown in Figure D.

Autopol II – Specifications

AUTOPOL II 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 589nm
Optional Wavelengths 365nm, 405nm, 436nm, 578nm.
Wavelength Selection Touchscreen Selectable:
2 standard, 4 Optional
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
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 OD 4.0)
Input Power 100 – 240V, 50/60Hz
Operation Dimensions 24.3″W x 12.7″H x 17″D,
617mm W x 323mm H x 432mm D
Shipping Dimensions 36″W x 19″H x 21″D,
923mm W x 487mm H x 538mm 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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