GPRS беспроводной газовый счетчик

1.Operation Pressure Range: 0.5 10kPa2.Material: Steel3.Pressure Loss: ≤250Pa4.Working Temperature: -20 505.Storage Temperature: -20 606.Relative Humidity: ≤93%7.Display Mode: Character Wheel & LCD8.Center Distance: 130mm9.Screw Thread: M30 x 210.Center Frequency: 433MHz11.Communication Speed: 9600bpsThe function of closing valves during idle time:Prevent the basal meter from ventilation when it is blocked; The function of self-checking of valves:Prevent the basal meter from being blocked when it is not used for a long time and clear the mechanical faults of valves; Control plan for pulse error:Double tongue tubes are adopted for reading,control module can inspect the breaking and damaging of thread automatically,the valves can be closed automatically.