 Ultrasonic water meters are typically very accurate, with residential meters capable of measuring down to 0.01 gallons or 0.001 cubic feet.In addition, they have wide flow measurement ranges, require little maintenance and have long lifespans due to the lack of internal mechanical components to wear out.While relatively new to the American water utility market, ultrasonic meters have been used in commercial applications for many years and are becoming widely accepted due to their advantages over traditional mechanical designs.