... DN250, DN300, DN350, DN400, DN450, DN500; Applicability: gas (air, oxygen, nitrogen, coal gas, natural gas, chemical gas and so on), liquid (water, high temperature ... : ≤1.6MPa ≤2.5MPa ≤4Mpa;Accuracy grade: liquid 0.5 grade, gas, steam 1.0 grade;Range of flow rate: liquid: 0 ... ; Field LCD display: -25°C—+55°C;Material of meter body: 1Cr18Ni9Ti (other materials supplied by agreement). Vortex flow meter