Electromagnetic signal symbol
Also called Wireless signal, Sonic signal
An electromagnetic or sonic signal travels without a wire or tube: radio, light, radar or sound.
What the electromagnetic signal symbol means
An electromagnetic or sonic signal travels without a wire or tube: radio, light, radar or sound.
How it is drawn
A wavy line.
The electromagnetic signal symbol in each standard
Drawn as ISA 5.1 defines it, as on most US and international legends.
Signal lines are not part of ISO 10628-2. They come from IEC 62424 or ISA 5.1.
German (DIN): Funkverbindung. See DIN P&ID symbols.
Where you see it on a P&ID
For wireless transmitters, radar level and ultrasonic devices.
Tag codes
The electromagnetic signal is commonly tagged:
- ISA 5.1
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 electromagnetic signal symbol look like on a P&ID?
A wavy line.
What is a electromagnetic signal used for?
An electromagnetic or sonic signal travels without a wire or tube: radio, light, radar or sound. You will find it for wireless transmitters, radar level and ultrasonic devices.
What tag does a electromagnetic signal have?
It is commonly tagged ISA 5.1. The exact tag format comes from the project numbering procedure and the legend sheets.
Is the electromagnetic signal symbol the same in ISA and ISO?
Signal lines are not part of ISO 10628-2. They come from IEC 62424 or ISA 5.1. Companies vary the details, so always check the legend sheets at the front of the P&ID set.
What is the electromagnetic signal called in German?
Funkverbindung. On a German R&I-Fließschema it is drawn to DIN EN ISO 10628-2.
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