... 4.Best 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,Flange ... ,Able to adopt hang weight method to test the flow meter.9,Measurement range can be changed by replacing ... ; external power supply of 24VDC; 220VAC (only for separate digital tube)Output formsSite display reading; 4~20mA (2 ...