• Automatisches Prozesspolarimeter Propol
  • Automatisches Prozesspolarimeter Propol
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Automatic Process Polarimeter:

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The Propol process polarimeter is used as a polarimetric online or inline sensor for concentration measurement in the production of chiral compounds. Its measuring method compensates the Optical Rotation by means of the Faraday effect. This means it has no moving parts and is therefore maintenance-free. Typical applications are the synthesis or extraction of biochemicals, separation of racemates, liquid sugar poduction and waste water control in sugar refineries.

Key features

Application-oriented design

  • Measuring unit and control unit connected by a cable of 100 m length
  • Robust cast aluminum housing for harsh environments
  • Waterproof, protection class IP 65
  • Can be modified for explosion proof-status (optional)
  • No mechanically moved parts and therefore maintenance-free
  • LED light source with an average life of 100 000 h

Adaptable and secure

  • Measuring ranges for Optical Rotation, %Sucrose, %Glucose
  • Three user-configurable concentration ranges
  • Facility for automatic temperature compensation
  • Comparator functions with two programmable setpoints
  • Ready for every task with 20 mA analog output and RS-232 interface

Typical applications

  • Synthesis and extraction of chiral biochemicals such as antibiotics, amino acids, hormones, vitamins, flavors and fragrances
  • Separation of racemates, molasses separation, liquid sugar production
  • Waste water control in sugar refineries

Technical specifications

Measuring scales
  • Optical Rotation
  • % Sucrose
  • % Glucose
  • % Concentration (3 user-configurable ranges)
Measuring range
Optical Rotation± 6.0°
% SucroseRange depending on the optical cell length
e.g. 0 – 65 % for 10 mm
% GlucoseRange depending on the optical cell length
e.g. 0 – 65 % for 10 mm
% Concentration 1 – 3Each scaleable with a standard solution of known concentration, by quartz standards, by linear factor input, by polynomial coefficients input for non-linear scaling
Temperature0 to 99.9 °C (requires Pt100 sensor)
% SucrosePredefined
% GlucosePredefined
% Concentration 1 – 3Free definable
Optical Rotation0.001°
Concentration scales0.001%, 0.01% or 0.1%
Temperature0.1 °C
Optical Rotation± 0.001°
Concentration scales± 0.001%
Temperature± 0.1 °C
RS-232CFor communication with a computer or terminal
Analog output
  • Configurable for 0 – 20 mA, 4 – 20 mA or 12 ± 8 mA
  • The begin and end can be assigned concentrations
  • max. load 500 Ω
Limit switches (comparator functions)
  • Two independent setpoints. Concentrations and dead band menu-selectable.
  • Solid state relay output
  • max. load 240 VAC, 0.5 A
Safeguard monitorRelay output to warn about low light, overrange or device error conditions. Solid state relay output, max. load. 240 VAC, 0.5 A
Mechanical data
Measuring unit
  • Dimensions: 550 mm x 130 mm x 190 mm (L x W x H)
  • Protection class: IP 65
  • Weight: 16 kg
Control unit
(19“ wall cabinet)   
  • Dimensions: 600 mm x 490 mm x 215 mm (L x W x H)
  • Protection class: IP 55
  • Weight: 23 kg
Interconnecting cableLengths to be specified: 2.5 to 100 m
Additional information
Optical wavelengthStandard: 589 nm, optional 546 nm
Light sourceLED, average life time 100 000 h
SensitivityOD 3.0 (Optical Density)
Integration time and measuring rate20 s-1
Mains supplySelf-adapting to any mains from 100 – 240 VAC +10 % / -15 %, 47 – 63 Hz

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  • 3-year warranty
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