... DN300, DN350, DN400, DN450, DN500; Applicability: gas (air, oxygen, nitrogen, coal gas, natural gas, chemical gas ... , overheated steam);Measurable medium temperature: -40°C~280°C, -40°C~350°C;Nominal pressure: ... higher electrical level ≥6V, width of impulse 0.4ms, load resistance>150Ω;Standard current: ... —+55°C;Material of meter body: 1Cr18Ni9Ti (other materials supplied by agreement). Vortex flow meter