gas meter,gas meter,Co gas flow meter,flowmeter: No movable part:0. ... flow meter,flowmeter:industrial use,all gas, natural gasSBL digital target flow meter is improved from traditional flow meters ... external power supply of 24VDC; 220VAC (only for separate digital tube)Output formsSite display reading; 4~20mA (2-wire ... DN10 etc. can be manufactured to user requirements. SBL digital target Co gas meter