Aalborg GFM171S Gas Flowmeter. A compact and rugged gas flowmeter, designed to read laminar flow rates of gases through a parallel flow transducer. Incorporates an advanced straight tube sensor in conjunction with flow passage elements constructed of aluminum and brass for non-corrosive gases. Rigid metallic construction, can be used as a bench top unit or mounted by means of screws in the base. Flow Rate: Up to 10 L/min N2.Leak Integrity: 1 x 10-7 smL/sec of helium max to outside environment. Maximum Pressure: 500 psig (34.5 bars). Output Signal: 0-5 Vdc and 4-20 mA.Temperature Range: 0Â°C to 50Â°C.Connections: 1/4" compression fittings.