... DN250, DN300, DN350, DN400, DN450, DN500; Applicability: gas (air, oxygen, nitrogen, coal gas, natural gas, chemical gas and so on), liquid (water, high temperature water ... bit display (m3, kg, t), conversion accuracy ±0.1%;Power supply:When voltage impulse output: +12VDC; when 4-20mA output ... Field LCD display: 3.6V No.1 1 lithium cell power supply, working life more than 2 years;Ambient temperature: ...