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Propol is an automatic polarimeter with a high resolution of 0.0001° Optical Rotation that permits the use of short cells with sample volumes from the milliliter range to microliter range. The measurement principle, compensation of the Optical Rotation by the Faraday effect, requires no moving parts and is therefore maintenance-free.
Features

 

High linearity
-          The linearity of the Optical Rotation and concentration scales is better than 0.05 %
-          Instrument temperature error close to zero
-          No mechanically moved parts mean no wear
-          Measurement scales for Optical Rotation, %Sucrose, %Glucose,
°Z International Sugar Scale (ICUMSA) and three user-definable concentration scales
High resolution opens new dimensions
-          Measures samples in the µl-range
-          Enables analysis of extremely dark-colored samples
-    Measures either individual samples or continuously, e.g. in the eluate of a HPLC (high performance liquid chromatography)
Specification

Principle of operation
Self-balancing polarimeter with magneto-optical compensation by Faraday effect
Measuring ranges
  • °Optical Rotation, range ±6°, resolution 0.0001°, 0.001°, or 0.01°, menu-selectable
  • User-definable concentration ranges: linear, standard or polynomial scales
  • % Sucrose, range 0-23 % (g/100 cm3) with
    40 mm cell, resolution 0.001 %
  • % Glucose, range 0-26 % (g/100 cm3) with
    40 mm cell, resolution 0.001 %
  • °Z International Sugar Scale, ranges with
    40 mm cell: ±86 °Z (standard) or -50 °Z to +120 °Z (sugar industry model), resolution 0.01 °Z
Sample temperature display
0-99 °C at 0.1 °C resolution. Sample cell with built-in Pt 100 temperature sensor, or a dipping probe required
Display
Green vacuum fluorescence display
Keyboard
Water-proof rubber membrane type with numeric key array
Automatic gain control
Compensates light attenuation up to an optical density of 4
Calibration and adjustment
Menu-guided calibration by Certified Quartz Control Standards
Calendar/clock functions
Battery-buffered quartz clock with date and time
Interfaces
RS-232C serial port,
analogue output 0-10 V or 5 ±5 V
Light source
Tungsten-halogen lamp, 6 V, 10 W, average life 5000 h
Optical wavelength
589 nm (standard) or 546 nm (optional)
Sample cells
Various types from 2.5 to 90 mm length, material stainless steel or all glass, special models for HPLC applications
Integration time
User-selectable from 1-99 s, defines the number of measurements averaged at each display refresh cycle. The measuring rate is 14 measurements/s
Measuring unit
Waterproof cast metal housing, dimensions 550 x 130 x 215 mm (L x W x H), weight 17 kg
Display unit
Bench top housing of light metal, dimensions 470 x 160 x 340 mm (L x W x H), weight 7 kg
Connecting cable
Between measuring unit and display unit,
length 2.5 m
Power requirements
Self-adapting to any mains voltage of 100/120 VAC or 200/240 VAC nominal +10 %/-15 %, 45-65 Hz

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