Meters, namely, pH meters, electric meters; water meters; apparatus and instruments for weighing, measuring, signalling, and checking water, namely, water tank level gauges; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling water, namely, water meters, water level indicators, water level gauges, water level indicators, water temperature gauges, oil-water thermistors, water leakage detection alarms, water distress luminous beacons, rods ...