RV-SBL analyzer flowmeter indicator 1. SBL data display 2. 4-20mA,0-10V,impulse, ... , air, hydrogen, natural gas and nitrogen gas, liquified petroleum gas, super - the oxadation hydrogen, flue gas, marsk, butane, and chlorine...etc ... /2P of Standard Hole Board.l Able to adopt hang weight method to test the flow meter.l Measurement range can ...