Technical requirements:
1. Accuracy Class: B/A, the measuring accuracy class equal to electromechanical gas meterf+s
2.Automatic data memory ,keeping time fª10years, the service life of IC card >10 million times
3.Non-touch sampling , the accuracy class of controller >0.1%
4.Working voltage: 3V/4.5V/6V power consumption: Solid currentf_10»A
5.Power source: With battery outside, users could exchange freely
6.Temperature range: -10f¦-40f¦,relative humidity not exceed 93%RH·+20f¦·¼
7.Maximum working pressure: 30KPa
8.Gas pressure loss:<250a(infuse pressure 1KPa,gas meter total pressure loss)
9.Controller simultaneous measure accuracy f_0.1%H