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K-Patents Sanitary Compact Refractometer PR-23-AC
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PR-23-AC Brochure pdf
Product manual pdf
Instrument verification pdf
K-Patents Sanitary Compact Refractometer PR-23-AC provides accurate means for measuring liquid concentrations and Brix in small pipe line sizes of 2.5 inch and smaller.

The PR-23-AC sensor is installed in the pipe bend. It is angle mounted in the outer corner of the pipe bend directly or through a flow cell using a 3A Sanitary clamp.

The measurement range covers 0-100 Brix. The accuracy is ± 0.1 Brix and the measurement is automatically temperature compensated. Low and high concentration alarms can be configured. Because of the digital sensing technology suspended solids, bubbles or colour changes do not affect the measurement or the accuracy.


The 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.
  • Meets 3A Sanitary Standard and tested for CIP cleanability according to EHEDG
  • Withstands CIP cleaning.
  • Dual connectivity: one transmitter can operate two sensors. A second sensor can be easily integrated later.
  • Completely digital system: particles and bubbles do not affect operation or accuracy.
  • Patented CORE-optics: no drift, no re-calibration, no mechanical adjustments.
  • Ethernet connection and remote panel for data-logging and remote operation.
  • Effective heat transfer and isolation using Teflon® and ceramics in the sensor provide safe operation also in higher process temperatures (max. 130 °C/266 °F).
  • Fast process temperature measurement by built-in Pt1000 and automatic temperature compensation
  • Easy on-site instrument verification within users’ own quality assurance system with standard Refractive Index liquids.
  • ATEX approved for Zone II, area classification EX II 3 G EEx nA II T4.
  • FM approved for Class I, Div. 2, Groups A, B, C and D, T6
  • CSA certified for Class I, Div. 2, Groups A, B, C and D, T4.
  • cCSAus certified for Electrical Safety, Sensor: Class I, Pollution Deg. 3; Transmitter: Class I, Pollution Deg. 2; Installation Cat. II.