Metering apparatus has housing with locally transparent wall for reading displayed data and some of the wall is made of non=porous hydrophilic material

摘要

Apparatus has a housing with a wall that is locally transparent for reading displayed data. A zone of the wall is made of non-porous hydrophilic material. The zone may be a membrane welded or overmoulded onto the rest of the housing. The data is displayed by an electronic or mechanical meter.