PR-53W

Vaisala Polaris™ PR53W Valve-Body Process Refractometer

The Vaisala Polaris PR53W valve-body process refractometer is specifically designed to measure concentrations of aggressive chemicals, such as sulfuric acid, hydrochloric acid (HCl), and sodium hydroxide (NaOH). It is ideal for use in production pipelines within the chemical, biochemical, and pharmaceutical industries. The PR53W is mounted in a membrane-lined valve body with non-metallic wetted parts (ETFE-lined flow cell and sapphire prism), ensuring minimal contamination risk and suitability for highly corrosive media. This design allows for convenient flange mounting to 2-inch ANSI, JIS, and DN50 flanges.

Key Features

- Non-Metallic Wetted Parts: Features an ETFE-lined valve-body flow cell and sapphire prism, ensuring no metallic parts come into contact with the process media. This minimizes contamination risk and makes it suitable for highly aggressive chemicals in pressurized pipelines.

Reliable Optical Measurement: Provides accurate concentration measurements based on the refractive index (RI). The RI can be measured from practically any liquid, including slurries, and responds to dissolved material. Measurements are not affected by bubbles, particles, suspended solids, or color, allowing accurate measurement for various chemicals.
Broad Measurement Capabilities: Capable of measuring hydrochloric acid, sulfuric acid, amino acid, potassium hydroxide, and more than 500 other concentration curves.
Low Maintenance: Inline process refractometers are easy to install and have no moving parts that require regular maintenance.
Accurate and Reliable: The optical measurement principle offers accurate and drift-free measurement. An integrated temperature measurement compensates for changing process temperatures, ensuring accurate concentration readings.
Easy Mounting: Designed for convenient flange mounting to 2-inch ANSI, JIS, and DN50 flanges, simplifying installation into process lines.
Outstanding Long-Term Stability: Delivers years of accurate, continuous, fast, and stable concentration measurement directly in the process stream, even in challenging and corrosive environments.
Wash System: For demanding applications with sticky products, a powerful wash system ensures correct measurement.
Indigo520 Compatible: Can be directly interfaced or connected to a Vaisala Indigo520 transmitter. The Indigo520 provides data storage, a graphical interface, and analog and digital interfaces, enhancing process control. Settings, measurement parameters, and updates can be managed directly from the Indigo520 or via USB cable with Vaisala software.
Integrated Outputs: Built-in 4-20 mA and Modbus RTU outputs.

Technical Highlights

Measurement Range: Refractive Index: 1.32-1.53 nD (corresponds to 0-100 °Bx). High range kit available: 1.42-1.72 nD.
Accuracy: Refractive Index: ±0.00014 nD (0.1 °Bx). Accuracy of analog outputs at +70°C: ±0.1% of full scale (±0.00002 RI).
Repeatability: Refractive Index: ±0.00002 nD.
Resolution: ±0.000015 nD.
Response Time (T63 with default damping): 10s.
Measurement Cycle: 1/s.
Long-term Stability: Max. 0.1% full scale / year.
Process Temperature: -40 to +150 °C (-40 to +302 °F).
Design Temperature: +180 °C (356 °F).
Operating Temperature: -40 to +60 °C (-40 to +140 °F).
Power Supply: 24 V DC nominal (9-30 V DC).¹⁹ Power consumption less than 1 W.
Interfaces: Built-in 4-20 mA and Modbus RTU outputs.²⁰ Digital output RS-485. Max cable run 300 m (approx. 1000 ft) (digital).
IP Rating: IP66, IP67.
Weight: PR53W: 10 kg (22.05 lb).
Wetted Parts: Body/flow cell: ETFE lined. Prism: Sapphire monocrystalline, 99.996% Al₂O₃. Gaskets: Modified PTFE or PTFE.

Applications

The PR53W is designed for measuring concentrations of aggressive chemicals in production pipelines, including:

Sulfuric acid
Hydrochloric acid (HCl)
Sodium hydroxide (NaOH)
Chemical industry
Biochemical industry
Pharmaceutical industry
Chemical mixing and monitoring installations in fine chemical and semiconductor industries.

Ideal For

Chemical, Biochemical, and Pharmaceutical Industries: For handling aggressive chemicals in production pipelines.
Applications Requiring Non-Metallic Wetted Parts: To prevent contamination and ensure corrosion resistance.
Pressurized Pipelines: Due to its robust valve-body design.
Convenient Flange Mounting: To standard 2-inch ANSI, JIS, and DN50 flanges.
Long-Term Stable Measurements: In corrosive and demanding environments.

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