... quality hydrogen meter 2,measure and control flow rate 3.manufacturer of flowmeter Portable Hydrogen Gas Flow Meter 1.high quality hydrogen meter2 ... gas analyzers, pollution monitors, chemical injectors, cabinet purging, etc. Models in stock: 0.5-8LPM,1-12LPM,2-20LPM ,3-30LPM ... for other models: ModelMeasure RangeScrew threadAccuracyUnit price(USD)ml/min(Liquid)NM3/h(Gas)NT-4T6-600.2-2l/mindirect ...