FLEXIM - PIOX S721 SA - Sulphuric Acid Mass Flow, Concentration & Density Meter

Sulphuric Acid Mass Flow, Concentration & Density Meter

Non-invasive Mass Flow, Concentration and Density Measurement of strong Sulphuric Acid and Oleum

By measuring non-invasively from the pipe wall outside and never being in direct contact with the medium flowing inside, PIOX S721 SA  is the ideal solution for monitoring strong sulphuric acid and oleum:

  • The system measures sulfuric acid concentration and mass flow directly on the main production lines (concentration range of 80% to 100%)
  • It accurately determines the acid strength in real time
  • It significantly increases plant safety and availability as it does not require any pipe opening or welding for installation nor any additional flanges
  • The measurement is free of wear or abrasion and thus also virtually maintenance free
  • It can never be a source for potential leaks and sub-sequent process shut-downs

Applications / metering points of PIOX S


Solutions for Sulphuric Acid and Oleum Producers and Demanding Industries


  • Extreme reliability due to no direct contact with the medium
  • Highest accuracy over a wide flow, concentration and temperature range (up to 400 °C)
  • Increased plant safety and availability - no pipe works or process shut-downs required
  • Certified for usage in hazardous areas (ATEX, IECEX Zone 1/2 and FM Class I, Div. 1/2 certified)


    Hechos técnicas

    Incertidumbre de medición
    (caudal volumétrico)
    ±1 % of reading ±0.005 m/s
    0.15 % of reading ±0.005 m/s
    Alcance de volocidad de flujo
    0.01...25 m/s
    Transmisor de zona Ex
    only safe area
    Fuente de alimentación
    100-230VAC, 24DC, 12DC
    Transductor disponible
    Shear wave
    para zonas Ex
    para el rango de tamaños de tubería
    DN25 ... DN2000
    para el rango de temperatura
    -40°C ... +130°C
    4-20mA active/passive
    4-20mA HART active/passive
    1x Pt100/Pt1000
    1x 4-20mA active/passive
    Comunicación digital
    Modbus RTU/TCP
    Profibus PA
    Foundation Fieldbus

    360° view


    Para la vista manual de 360 °, tire de la imagen hacia la izquierda o hacia la derecha.


    Solutions for Sulphuric Acid and Oleum Producers and Demanding Industries


    PIOX S721SA

    Especificación técnica
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