... , DN200, DN250, DN300, DN350, DN400, DN450, DN500; Applicability: gas (air, oxygen, nitrogen, coal gas, natural gas, chemical gas and so on ... 0.5 grade, gas, steam 1.0 grade;Range of flow rate: liquid: 0.6-6 m/s, gas: 5-60m ... °C; Field LCD display: -25°C—+55°C;Material of meter body: 1Cr18Ni9Ti (other materials supplied by agreement). Vortex flow meter