Application

• Stainless steel pipe DN 500
• Partial filling with heavy fluctuation
• Acidified, very turbid water (approx. 50 NTU)

Definition of tasks

• Replacement of a non-functioning clamp-on measurement
• Continuous flow measurement to control a processing plant for acidified water
• Reliable measurement at fluctuating level, variable turbidity and acid contents

Solution

• The cross correlation method with digital pattern detection has been used. Here the pollution load does not affect the velocity evaluation.
• The corrosion-proof pipe sensor Type POA was installed directly from the outside using a welding nozzle bottom upwards flush with the channel bottom. The sensor provides readings on level and flow velocity directly to the transmitter.
• The transmitter computes the current flow rate and transmits the data via ModBus to the processing plant control system.