P&IDResources / Symbols / P&ID symbols / InstrumentsUpdated 29 Oct 2026

Panel-mounted instrument symbol

Also called Control room instrument

A panel-mounted instrument is on the front of a panel in the main control room, where the operator can see and use it.

Panel-mounted instrument P&ID symbol
Panel-mounted instrument symbol, as drawn on a P&ID

What the panel-mounted instrument symbol means

A panel-mounted instrument is on the front of a panel in the main control room, where the operator can see and use it.

How it is drawn

A circle with a solid horizontal line through the middle.

The panel-mounted instrument symbol in each standard

ISA 5.1

Drawn as ISA 5.1 defines it, as on most US and international legends.

Not in ISO 10628-2
ISO 10628-2

ISO 10628-2 does not cover instruments. On ISO-based P&IDs they are drawn as IEC 62424 PCE requests, or to ISA 5.1 on many international projects.

IEC 62424

PCE request in the central control room. A line through the oval: operated and displayed in the central control room.

IEC SVG

German (DIN): PLT-Stelle in der Messwarte. See DIN P&ID symbols.

Where you see it on a P&ID

For indicators, recorders and controllers in the main control room.

Tag codes

The panel-mounted instrument is commonly tagged:

  • PIC
  • FIC
  • TR

Tag formats follow the project numbering procedure. For instruments, the letters follow ISA 5.1, explained on the instrument symbols page.

Frequently asked questions

What does the panel-mounted instrument symbol look like on a P&ID?

A circle with a solid horizontal line through the middle.

What is a panel-mounted instrument used for?

A panel-mounted instrument is on the front of a panel in the main control room, where the operator can see and use it. You will find it for indicators, recorders and controllers in the main control room.

What tag does a panel-mounted instrument have?

It is commonly tagged PIC, FIC, TR. The exact tag format comes from the project numbering procedure and the legend sheets.

Is the panel-mounted instrument symbol the same in ISA and ISO?

ISO 10628-2 does not cover instruments. On ISO-based P&IDs they are drawn as IEC 62424 PCE requests, or to ISA 5.1 on many international projects. Companies vary the details, so always check the legend sheets at the front of the P&ID set.

What is the panel-mounted instrument called in German?

PLT-Stelle in der Messwarte. On a German R&I-Fließschema it is drawn to DIN EN ISO 10628-2 and DIN EN 62424.

Every panel-mounted instrument on your drawings, found for you.Deskely Extract reads ISA and ISO P&IDs alike, finds each tag with its type, system and subsystem, and hands your engineers a register to check instead of a spreadsheet to type.
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