Vaisala K-PATENTS® Process Refractometer PR-23-W/M

Saunders Body Refractometer PR-23-W

The Saunders Body Refractometer PR-23-W is designed for use in chemically aggressive solutions and ultra-pure fine chemical processes in large-scale production and in large pipelines (diameter 50, 80 or 100mm/2", 3" or 4").

The PR-23-W refractometer is delivered with a Saunders (diaphragm) valve body and can be mounted either in a vertical or horizontal pipe. The Saunders body material is Graphite cast iron, which provides a solid mechanical base for the sensor installation.

The cast iron is lined with 3mm ETFE (Ethylene tetrafluoroethylene) fluoroplastic that gives the body a high chemical resistance. The sensor wetted parts materials are Teflon® PTFE (Polytetrafluoroethylene) and Sapphire (Al2O3). The material of the sensor cover is stainless steel AISI 316 L.

Teflon Body Refractometer PR-23-M

The Teflon Body Refractometer PR-23-M is designed for small pipe sizes.

The sensor wetted parts Teflon® PTFE or Kynar® PVDF (Polyvinylidenefluoride), Sapphire (Al2O3), and Kalrez® are carefully selected because they have high chemical and mechanical resistance.

The external materials AISI 316L (sensor cover) and polyamid 6.6 (electrical connector) withstand chemically aggressive gases and splashes of the process liquid.

The measurement accuracy of either Refractometer model is not influenced by particles, bubbles, colour or temperature changes of the process liquid.

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 % by weight.
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.
CORE-optics: no drift, no re-calibration, no mechanical adjustments.
Ethernet connection and remote panel for data-logging and remote operation.
Process temperature range: -20°C - 130°C (-4°F – 266°F).
Wetted parts: Teflom®, Sapphire (Al2O3), Kalrez® and Spinel (MgAl2O4) have excellent chemical and mechanical resistance.
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.
ATEX approved for Zones 0 and 1, area classification ATEX II 1G Ex ia IIC T4 (only Intrinsically safe PR-23-W-IA with single sensor transmitter STR).
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.
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