Vaisala K-PATENTS® Process Refractometer PR-23-GP

PR-23-GP Brochure (pdf)
Product Manual (pdf)
Instrument Verification (pdf)
Prism Wash with Steam (pdf)
Prism Wash with High Pressure Water (pdf)


Vaisala K-PATENTS® Process Refractometer PR-23-GP is an ideal instrument for measuring Brix in the demanding cane and beet sugar refining and milling processes.

The PR-23-GP sensor is installed via a flange or a clamp connection.

The measurement range covers 0-100 % by weight. The accuracy is typically ±0.1 % b.w. and the measurement is automatically temperature compensated. Low and high concentration alarms can be configured.

Because of the digital sensing technology, the PR-23-GP it can measure dissolved sugar without influences from undissolved particles or crystals. Therefore, it is reliable instrument for monitoring the syrup / mother liquor concentration in crystallization process.

Key Features:

  • Universal calibration of each sensor: All sensors are freely interchangeable.
  • Full measurement range Refractive Index nD 1.3200 – 1.5300, which corresponds to 0-100 Brix.
  • Completely digital system: particles, crystals and bubbles do not affect operation or accuracy.
  • Patented CORE-optics (US Patent No. US6067151): no drift, no re-calibration, no mechanical adjustments.
  • Ethernet connection and remote panel for data-logging and remote operation.
  • Process temperature range: -20°C – 150°C (-4°F – 300°F).
  • Fast process temperature measurement by built-in Pt1000 and automatic temperature compensation.
  • Dual connectivity: one transmitter can operate two sensors. A second sensor can be easily integrated later.
  • Easy on-site instrument verification within users’ own quality assurance system with standard Refractive Index liquids.