Solid particles and their impact on water meter operation

Each entity that uses water meters to monitor water consumption stays responsible for their daily service/repair work and accuracy inspections. Valid legalization certificates for water meters are required by the law. The tests of metrological properties run during water meter operation show that the readings may change over time. The article looks into one particular source of failure of typical water meters, that is, deposition of particles, including iron microparticles. The tested water meters came from various water supply systems and had several years of operation. They were examined for readings errors at the legalization stand. The paper summarizes also the effects of regeneration of volumetric water meters with an ultrasonic cleaner. The efficiency of t is method has been illustrated by photo documentation.