Engineered for the challenging conditions associated with high temperature delivery of condensable precursors and dopants, the 9861 Series high temperature thermal mass flow controllers and meters from Brooks Instrument feature a high purity, high leak integrity metal flow path ensuring compatibility with all process gases and vapors. The patented IsoSensor™ is a high stability flow sensor compatible with the elevated environmental temperatures found in heated gas lines and baking systems. The ultra-low drift performance of the IsoSensor™ reduces the need for frequent re-zeroing and recalibration typical in high temperature applications.