... after-service digital gas meter (LCD display)Specifications:A,SBL digital flow meter,intelligent flow meter,gas flow meter,liquid flow meter,steam flow meter etc.B, ... to adopt hang weight method to test the flow meter.9,Measurement range can be changed by replacing target ... Li batter; external power supply of 24VDC; 220VAC (only for separate digital tube)Output formsSite display reading; 4~20mA (2 ...