... 4.Best after-service digital gas meter (LCD display)Specifications:A,SBL digital flow meter,intelligent flow meter,gas flow meter,liquid flow ... can be changed by replacing target according to need. 10 ,LCD display.11,4-20mA, 0-10V, impulse, and RS485 outputs.12 ... ; 220VAC (only for separate digital tube)Output formsSite display reading; 4~20mA (2-wire system); pulse; 0~10V; RS232/RS485 (optional);HART ...