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 Historical

ISA 5.1-1984 (R1992)

Instrumentation Symbols and Identification (formerly ANSI/ISA S5.1-1984 (R1992))

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The International Society of Automation [ISA]


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As the voice of the U.S. standards and conformity assessment system, the American National Standards Institute (ANSI) empowers its members and constituents to strengthen the U.S. marketplace position in the global economy while helping to assure the safety and health of consumers and the protection of the environment.

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