LLQ series roots flowmeter is volume-type flow instrument. It is used to continuously measure volume flow of gas in the channels. It can measure most of ordinary flow stability gas such as oil or gas wellhead measurement and industrial gas measurement.

The flowmeter can display cumulative flow on site. If it equips with LPZ electrical pulse converter and the corresponding SXP-ll3 intelligent flow totalizer, it can display cumulative flow and instantaneous flow of gas with basic pressure (1O1.32Kpa), basic temperature (20 ℃). Flowmeters can be used with explosion-proof requirement, the explosive grade is d Ⅱ BT4.