What does the Serial number (SN) symbol look like?

The letters SN in bold capitals inside a rectangular frame. It is also called “S/N”, “SN” and “Serial number”.

Which standard defines the Serial number (SN) symbol?

It is listed as ISO 15223-1-5.1.7 and ISO 7000-2498.

Serial number (SN) symbol: the letters SN in bold capitals inside a rectangular frame — ISO 15223-1-5.1.7, ISO 7000-2498

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Medical device label symbols Medical device & pharmacy labels

Serial number (SN)

The letters SN in bold capitals inside a rectangular frame. · also called “S/N”, “SN”, “Serial number”

What the Serial number (SN) symbol means

Serial number of this unit

The number next to SN is the manufacturer's serial number, which identifies this one individual device rather than a whole batch. It lets that specific unit be identified.

Source · Official website Medical device manufacturer's digital symbols glossary · checked Nov 11, 2026

Where it appears

Medical device label

ISO 15223-1
—This meaning

Questions about the Serial number (SN) symbol

What does the Serial number (SN) symbol mean?: The number next to SN is the manufacturer's serial number, which identifies this one individual device rather than a whole batch. It lets that specific unit be identified.
What does the Serial number (SN) symbol look like?: The letters SN in bold capitals inside a rectangular frame. It is also called “S/N”, “SN” and “Serial number”.
Which standard defines the Serial number (SN) symbol?: It is listed as ISO 15223-1-5.1.7 and ISO 7000-2498.

Checked against the source · Nov 11, 2026 · How we verify

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