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A circle with a single horizontal line across it.
Also known as: Panel mounted instrument symbol, Board mounted instrument
On a piping and instrumentation diagram a circle with a single full line across it denotes an instrument accessible to the operator in the main control room.
Denotes an instrument accessible to the operator in the primary control room.
Contexts: Technical drawing
Uses a full line where a local panel uses a broken one, so the line style records exactly where an operator must stand to see the reading.
Contexts: Technical drawing
A circle with one horizontal line drawn straight across its full width, dividing the tag letters from the number.