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 del sistema de medición (caudal volumétrico)
±0.3 % de la lectura ±0.005 m/s
Measurement uncertainty at the measuring point (volumetric flow rate)
±1,0 % 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



Especificación técnica
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