The SEWER-MAG Insertable modified full bore Electromagnetic Flowmeter, is easy to install, extremely accurate, and can be DC battery or AC supplied. The inflatable flow-through plug forces the water through the measuring tube, which is maintained full with an especially designed outlet elbow.

The best open channel flowmeter installed in a sewer pipe needs to be checked or calibrated from time to time. This is a complicated task to achieve.

When the pipe is large and the level of the liquid flowing is over 150 to 200 mm, usually a velocity profile taken with a FLO-MATE TM associated to a ruler level measurement gives one of the best flow references.

When the pipe is small with low levels and/or high velocities the velocity profile technique is not suitable anymore. The SEWER-MAG however allows a perfect measurement over several hours to a day. Long-term measurements are not suggested as the measuring tube can fill with debris.