FLEXIM - PIOX R - Process Refractometer for highly corrosive media - Highly corrosion resistant Chemical Design variant

Highly corrosion resistant Chemical Design variant

Process Refractometer for highly corrosive media

The concentration analysis of liquid media is one of the most critical parameters for a proper process and quality control within the Chemical Industry.

By measuring the refractive index, concentration levels of many media consumed or created within the chemical and textile fiber industry, such as solvents, acids, caustics as well as other - often corrosive and toxic - intermediate and end products, can accurately be monitored and a total quality control be assured.

When dealing with highly corrosive media, such as hydrochloric, strong sulfuric or hydrofluoric acid, the inline process refractometer PIOX R is available as a special coal powder reinforced PTFE design variant offering an unrivalled corrosion resistance, long term stability and reliability in such harsh environments.

Being ATEX Zone 0/1, 1 and 2 certified and available with long and short sensorheads that can be integrated into the process via DIN / ANSI flange or the proprietary FLEXIM flow cell, PIOX R is the ideal process analytical technology for a wide array of liquid media within the chemical industry.

Highly corrosion resistant Chemical Design variant - PIOX R - PTFE Chemical Design Variant


  • Patented transmitted light measurement principle - offering completely drift free, precise and long term stable measurements
  • All wetted materials of the Refractometer are completely made out of carbon fibre reinforced PTFE - offering an exceptional corrosion resistance
  • Highly accurate optical process technology making costly laboratory tests obsolete
  • No flow velocity needed - as known from conventional technologies
  • Independent in regard to gas bubbles and turbitity as well as the media‘s viscosity
  • Internal self diagnostic tools for predictive and low maintenance efforts


    Technical Facts

    Measuring quantities
    (temperature compensated) Refractive index, media temperature, ° Brix (Plato, Oechsle), w%, additional quantities programmable
    Measurement range
    nD: 1.3 ...1.7, °Brix: 0 ...100
    Measurement accuracy
    nD: 0.000 2 (corresponds to: 0.1 °Brix, 0.1 w%)
    Operating temp. (media)
    - 5 °F ... (+ 270°F) + 300 °F
    Fluid pressure
    PN 10, PN 16, on request PN 40 (depending on process connection)
    Degree of protection
    Sensor: NEMA 6 (IP67), ATEX (IECEx) Zone 0/1, 1, 2 Transmitter: PIOX R704: NEMA 4X (IP65)
    Degree of protection
    PIOX R705: NEMA 4X (IP66), stainless steel enclosure, ATEX Zone 2; optional PIOX R709: 19 inch rack version, IP20
    Wetted parts, materials
    Completely carbon fibre reinforced PTFE
    Housing material
    PTFE powder coated Stainless Steel 304 (1.4301)
    Process connection
    DIN/ANSI compatible flange, proprietary FLEXIM flow cell
    Additional Notes
    Measurement according to the patented Transmitted Light Principle

    360° view


    For the manual 360° view pull the image left or right


    PIOX R400-*CTF

    Technical Specification

    PIOX R400 -chemistry-

    Technical Specification
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