pulse gas meter 1, Double display 2, Pulse output 3, Aluminum shell or steel shell pulse gas meterApplications:1, Double display;2, Aluminum case or steel ... ;4, One card one gas, prepaid function..Technical datas:Nominal flow-rate:1.6M3/H, 2.5M3/H, 4M3/H;Measuring ... .01M3Meter Design life:>=15 yearsStandard: GB/T6968-1977meter>. pulse gas meter