... ,flow measurement for all oil,base oil,heavy oil Patent No.ZL 00 2 01624.9 intelligent fuel flowmeter (digital display)SBL digital target ... batter; external power supply of 24VDC; 220VAC (only for separate type)Output formsSite display reading; 4~20mA (2-wire system); pulse; 0 ... shall execute GB/T9115.1~9115.4~2000 series standard. For pipeline type, small diameter flowmeter of DN6, DN8, DN10 etc ...