The dry and the wet weather pipes are equipped with high quality electromagnetic flow meters of the Parti-Mag II type manufactured 1996 by Bailey-Fischer and Porter in Göttingen, Germany. This flow meter supplier has specified a simple set of installation requirements demanding a straight pipe section without any hydraulic disturbances within a distance to a flow meter of 15 times the diameter - distributed with 10 and 5 times the diameter in upstream and downstream directions, respectively. For this reason the wet weather flow meter has been placed in its own structure, while the small meter is placed in the main station itself -see photos below: 

The small meter This flow meter is used to register dry weather flow as well as the start and the end of a rainfall runoff event. According to technical specifications this meter is able to produce high quality flow measurements in the interval 1-700 l/s with a maximum flow rate error of 1-1.5% of rating.

Diameter: 300 mm, model DP 4_F, equipment no.: A1 9606

The wet weather flow meter is used to register the main part of a rainfall runoff event, i.e. flow measurements in the interval 50-8000 l/s with the same flow rate error as mentioned above.

Diameter: 1000 mm, model DP 4_F, equipment no.: A1 9606