... delivery tern Air flow meter (Good quality,low price)Specifications:A,SBL digital flow meter,intelligent flow meter,gas flow meter,liquid flow meter,steam flow meter etc.B,Flange ... -10V;RS232/RS485;Hart protocol,GPS.Our digital flow meter are all LCD display,it also can show ... isolating type(ExdllCT4)Execution standard:Q/QZRX001-2007SBLdigital flow meter can widely used a variety of size pipeline ...