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.
- 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.
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|
|Measuring Mode||Optical Rotation
Specific Rotation Plus Concentration
User Defined Scale
|Measuring Scale||Degrees Arc Optical Rotation|
|Resolution||0.01° Arc Optical Rotation
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
|Prism||Glan Thompson Calcite|
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
|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.|
|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|