Review of development of and intelligence in field instruments

摘要

Field instruments such as temperature sensors and pressure sensors are changing from CPU-based smart type instruments to field network type instruments, as represented by the FOUNDATION fieldbus. The new concept of field networks requires newintelligence for field instruments, to enable them to process not only measured values but also management and diagnostics information.This paper introduces key technologies related to intelligence in the electromagnetic flowmeter and the microwave density meter.