IC card natural gas meter 1, double display; 2, Aluminum shell or steel shell IC card natural gas meterFeatures:1, Double display2, Aluminum shell or steel shell3, Application: natural gas, liquid petroleum gas and coal4, One card one gas, prepaid functionParameter:Nominal flow-rate:1.6M3/H, 2.5M3/H, 4M3/H.Measuring accuracy: B degreeoperating ambient temprature: -10degree ~ 50 degreeMax pressure ...