WSmart meter
WAir flow meter
WAmmeter
WAutomatic meter reading
WCyclonic flow meter
WDethridge wheel
WLVDT flow meter
WMagnetic flow meter
WMass flow meter
WMass flow sensor
WPeak expiratory flow
WPitot tube
WPublic utility
WRotameter
WThermal mass flow meter
WUltrasonic flow meter
WUtility submeter
WWater metering