1.Adopt volumetric rotary piston principle of measurement 2.Vacuum sealed register to keep a clear presentation in long-term service 3.Small start-up flow rate,hight precision 4.Materials comply with hygienic standard of potable water 5.Stainless steel body with a nice look ang high sturdiness 6.Using of hight quality materials to ensure a stable characteristic and long life. 7. Resistance to exterior magnet interference. 8.Hot water meter and remote reading transmission system for option Note: Technical data conform to ISO4064