Mass Flow Measurement of Wet and Dirty Gas Streams

Based on a simple and robust through-flow design, the Mass-Stream® Series from Bronkhorst (UK) presents no obstructions to the flow path, has no moving parts and features very low-to-ultra low pressure drop across the instrument. These features make the Mass-Stream ideal for the mass flow measurement of dirty gases, wet gases and even a combination of the two. Furthermore, the minimal pressure drop prevents harmful liquid drop-out from condensing gases, thereby eliminating internal corrosion and increasing instrument life.

Typical flow measuring applications for the Mass-Stream series include biogas from land-fill sites and digesters, WF6, SiCl4 and other particulating or condensing gases, dirty exhaust gases from combustion processes, carrier gases for particle analysers and humidified powder carrier gases for pharmaceutical research. In addition, the straightforward design can be applied to such cost-sensitive applications as consumption metering for

accounting or internal billing purposes, medical gas monitoring, burner ratio control, air flow control in paint spray lines, multiple gas mixing and gas generators.

Options include an integrated flow display on all models, a range of readout systems for analogue instruments, and digital versions providing fieldbus interfaces. One possible configuration is the combination of an external

potentiometer, on-board PID control and integral flow rate indication; whilst still providing an output signal for data logging, such an instrument represents a standalone solution, without the need for an external set-point signal.