Flow transmitter symbol
Also called FT
A flow transmitter turns the reading from a flow element into a signal for the control system.
What the flow transmitter symbol means
A flow transmitter turns the reading from a flow element into a signal for the control system.
How it is drawn
A field instrument circle tagged FT, connected to the flow element in the line, such as an orifice plate.
The flow transmitter symbol in each standard
Drawn as ISA 5.1 defines it, as on most US and international legends.
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.
German (DIN): Durchflussmessumformer. See DIN P&ID symbols.
Where you see it on a P&ID
On flow control loops, custody metering and allocation.
Tag codes
The flow transmitter is commonly tagged:
- FT
- FIT
Tag formats follow the project numbering procedure. For instruments, the letters follow ISA 5.1, explained on the instrument symbols page.
Related symbols
Frequently asked questions
What does the flow transmitter symbol look like on a P&ID?
A field instrument circle tagged FT, connected to the flow element in the line, such as an orifice plate.
What is a flow transmitter used for?
A flow transmitter turns the reading from a flow element into a signal for the control system. You will find it on flow control loops, custody metering and allocation.
What tag does a flow transmitter have?
It is commonly tagged FT, FIT. The exact tag format comes from the project numbering procedure and the legend sheets.
Is the flow transmitter 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 flow transmitter called in German?
Durchflussmessumformer. On a German R&I-Fließschema it is drawn to DIN EN ISO 10628-2 and DIN EN 62424.
- In production since 2014
- Thousands of daily users
- On MODEC FPSO projects since 2016