These and similar concerns have prompted an assessment of a broad spectrum of sensor technologies to aid in selecting the most likely candidates for adaptation to power plant applications. Testing and maintenance of pressure channels occupy a disproportionately large amount of effort to restore their accuracy and verify their operability. Many pressure transmitters now installed use oil filling to separate process fluids from the gauge mechanism and are subject to insidious failures when the oil leaks. Future developments in power plant control systems are expected to use digital/optical networks rather than the analog/electric data transmission used in existing plants. ![]() Advanced distributed control systems for electric power plants will require more accurate and reliable pressure gauges than those now installed.
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