Mass Flow Measurement of Nitric Acid

At a Dutch plant of a Norwegian supplier of fertilizers, nitric acid is filled into lorries at an automatic filling station in two different concentrations, 68% and 60%. If the lower concentration is desired, the 68% nitric acid is diluted by adding water. To ensure the accuracy of this process, a reliable concentration measurement is required.

PIOX S is the ideal solution for this task, as the ultrasonic transducers are simply clamped on the outside of the pipe, never get into contact with the media and therefore do not cause mechanical corrosion and acid spills as the before used Coriolis meters.

By simultaneously measuring the media concentration through the sonic velocity and supervising the flow rates by the ultrasonic transit-time principle, PIOX S can be also used to calculate the mass flow.

Advantages:

• No risk of corrosion and leaks
• Simultaneous measurement of concentration and mass flow
• Non-intrusive, no need for process shut-down