a mass flow controller has a standard envelope with an enclosure and a corresponding base . a pressure transducer is communicatively coupled to a process gas in a proportional inlet valve without being physically coupled to the base . the space formerly occupied by the pressure transducer is available for additional component integration , or reduction of the standard envelope size . a second pressure transducer is located remotely and shared by multiple mfcs . a relief valve can quickly relieve a p1 pressure of a p1 volume of process gas . a first laminar flow element and a second lfe and in series high conductance valve configured in parallel to produce a wide - range mfc that maintains accuracy .