Demonstration measurement at your site

Assure yourself of the advantages and superior performance of our non-invasive metering technology with a non-committal demonstration at your site. There are no prerequisites and the demonstration with one of our portable solutions will only take a few minutes of your time.

A brief description of your application would be helpful for us. Additional comments and a preferred date and time for the demonstration are always welcome:

Online Flow and Concentration Measurement of Sodium Hydroxide

Within a chemical site, Sodium Hydroxide (NaOH) is produced by means of electrolysis and then distributed via piping to the respective production plants for further processing. A stable concentration of the Sodium Hydroxide is thus obligatory and has to be monitored very closely. Inline instrumentation, such as previously installed density meters, regularly failed due to the harsh conditions.

As of the good experiences the customer already made with FLEXIM's non-invasive ultrasonic FLUXUS flow meters as well as FLEXIM's non-invasive PIOX S process analyzer for the concentration monitoring of Sulphuric Acid, now also the online concentration measurement of Sodium Hydroxide should be carried out by PIOX S.

Conjointly with the customer, FLEXIM adapted the measurement device to the operators needs and the individual concentration range it should be able to accurately cover.

Since PIOX S has been installed, it accurately and reliably monitors the NaOH concentration by measuring the liquid sound speed which stand in distinct relation to the liquids concentration. The concentration values determined by PIOX S are transmitted to the process control center. If the measuring values deviate from the preset values, the process is automatically regulated.


  • Reliable, non-intrusive concentration and mass flow measurement with one measuring system
  • Installation without process interruption
  • No media contact, no wear on the instrumentation, no risk of leaks
  • Drift-free measurement and long term stable

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