Netafim Octave Water Meter, 6 Inch - 100 Gallons per PulseOctave Ultrasonic Water Meters Octave Ultrasonic Water Meters have a 1. 5% accuracy for nominal flow rates. The vacuum sealed and tamper proof register provides durability and long term performance. A multi line digital readout display provides immediate reporting and visual indicators for critical conditions. Lithium batteries provide a 10 year life expectancy. Octave also offers a 5 year pro rated warranty the industrys longest. Why Octave Water