... flow metermediumgasexcept for acetylene accuracy±0.5%,±1%applicationIron, steel, chemicals, petroleum, metallurgy, paper, food, urban drainage and other industries ... diameterD25mm300mmD40mm2000mmflow velocity0.160m/s,if flow velocity>60m/s, choose bigger ... RS232C& HQBUS,alarm,range ability 1120remarkDirect mass flow measurement without the need for pressure or ...