DWA Industry Guide Watermanagement, Wastewater-Waste

9.1.8 Flow meters, water quantity measurement equipment

9.1.12 Level meters, level regulation equipment

9.1.53 Water level meters

9.2.3 Explosion protected switching equipment and systems

9.2.10 Switchgear

22.3.3 Flow measurement methods

22.3.4 Water gauges

22.4.3 Measuring equipment at sources and water gauge measuring