Economics, performance Brownsville s water system uses Honeywell Sensing and Controls pressure sensor transmitter to optimize system performance. Low-cost pressure sensor technologies can suffer application shortcomings. Some of these are thick-film bonded gages, piezoresistive, and bonded semiconductor technologies. Thick-film bonded devices are very reliable, but can suffer instability and drift due to aging of the bonding epoxy. Bonded semiconductor devices can suffer the same fate.
Devices using piezoresistive technology typically offer a limited temperature compensation range.
Maintaining sensor accuracy, as well as thermal and long-term stability, are requirements for an optimally tuned control system. In operation, pressure is applied to the diaphragm through a pressure port to strain the gages. Resistance change is proportional to measured pressure. Eliminating adhesives brings long-term stability to the system. Thin-film sputter technology directly fixes gages to the diaphragm, eliminating the adhesive interface that can move or degrade with time and exposure to process conditions.