Where is the serial number located on equipment?

Usually on a plate or sticker on the bottom, rear panel or battery compartment of the device — and often duplicated in the firmware menu (look for "About" or "Version") and on the original packaging. For flight-cased gear, check the chassis rather than the case: cases get swapped.

What's the difference between a serial number and an asset tag?

The serial number is assigned by the manufacturer and printed on the unit; the asset tag is a label you apply and control, usually with a barcode or QR code. Best practice is to use both and link them in your inventory system: the tag for fast scanning, the serial for warranties, insurance and resale.

Can two products have the same serial number?

Serial-number uniqueness depends on the manufacturer’s scheme. Keep manufacturer, model and serial together, and assign a separate internal unit code to avoid ambiguity. Investigate duplicates instead of silently overwriting a record.

Do I need serial numbers if I already use barcodes?

Yes. Your barcode identifies the unit inside your system; the serial number identifies it to everyone else — the manufacturer for warranty service, the insurer for claims, the police for theft reports, the buyer at resale. The barcode record should always store the serial behind it.

What should I do if a serial number is missing or worn off?

Check the device menu, purchase records and manufacturer support. If the serial cannot be recovered, assign an internal asset tag and record that the manufacturer serial is unknown; do not invent one. Verify ownership and provenance before buying used equipment with an altered identification plate.

Resources · Blog/May 21, 2024·Updated October 23, 2026·6 min read

What Is a Serial Number? A Practical Guide to Serial Numbers for Equipment

Serial numbers are the smallest unit of truth in a rental warehouse. Here's what they are, how they differ from model numbers and SKUs, and how to track them so gear stops disappearing between jobs.

A serial number is a unique code a manufacturer assigns to one specific unit of a product. Unlike a model number, which every unit of the same product shares, a serial number identifies a single physical item — which makes it the backbone of equipment tracking, warranty claims, insurance schedules and theft recovery.

What is a serial number, exactly?

A manufacturer uses a serial number to distinguish a unit within its identification scheme. Look on the chassis, base plate, rear panel or battery compartment, and check the device menu or original paperwork where available. Do not assume a number is globally unique across manufacturers or product lines.

For a rental or AV operation, that uniqueness is the whole point. Two ARRI bodies of the same model are interchangeable on a spec sheet, but not in real life: one has 400 hours and a fresh sensor service, the other came back from a beach shoot last week. The serial number is what lets you talk about this unit — its history, its condition, its earnings — instead of "one of the FX9s".

Serial number vs. model number vs. SKU: what's the difference?

These three get mixed up constantly on intake sheets and insurance claims, and the confusion is expensive. The short version:

Model number — identifies a product design. Every Sony FX9 shares the model number FX9. Useful for manuals, firmware and compatibility; useless for telling units apart.
SKU (stock keeping unit) — an internal sales/inventory code for a product line, usually created by a reseller or by you. One SKU can cover fifty physical units.
Serial number — identifies one physical unit of a model. Assigned by the manufacturer, printed on the device, and referenced on the warranty.
Asset tag — your own label (barcode or QR) applied on top. It points at the same unit as the serial number, but you control the format and the placement.

Rule of thumb: quote and sell by SKU or model, but check out, check in, insure and service by serial number. Any process that touches a specific physical item should reference the serial.

Why do serial numbers matter for equipment rental and AV teams?

Quantity tracking tells you whether all twelve microphones returned. Serial tracking adds which specific microphone is missing and which job last recorded it. Use the level of detail needed for the equipment rather than treating every bulk item as a separate asset.

Serial numbers can support warranty enquiries, repair records, insurance documentation and reports of missing equipment. Requirements vary by manufacturer, policy and authority. Keep purchase and handover evidence as well: a serial identifies the unit but does not by itself prove its condition or establish responsibility.

Finally, serials unlock unit economics. Utilization and revenue per serial tell you which units earn their keep and which have been shelf queens for a year — the difference between guessing your next purchase order and knowing it.

What do serial number formats look like?

There is no universal serial-number format. Treat the examples below as fictional strings, not a method for decoding a brand’s manufacturing date. Check the manufacturer’s documentation if you need to interpret a real serial.

Where you'll see it	Example format	How to record it
Camera body	S01-4523118	Preserve the letters, dash and leading zeros
Wireless mic system	1BZ08 4521234	Preserve the spacing and full string
Laptop / compute	C02XG2JHJG5H	Preserve the complete alphanumeric string
Lens	2847591	Store as text so leading zeros are retained
Your own asset tag	FIL-CAM-0042	Category + sequence you define — not a serial number

Treat serial numbers as opaque strings: record them exactly as printed, including leading zeros, dashes and letters. "Cleaning them up" is how the serial in your system stops matching the one on the warranty card.

How should you track serial numbers for equipment?

Serial tracking fails at the edges — intake, check-in, and the busy Friday when nobody scans anything. These practices keep it honest:

Capture the serial at intake, not later. The day a unit arrives is the only day someone is guaranteed to be holding it with the box, invoice and warranty card in hand.
Photograph the serial plate as a reference for checking transcription, and record any visible damage separately.
Pair each tracked unit with a barcode or QR asset tag. Test that the label resolves to the correct record and retain a readable code for manual entry.
Scan at every check-out and check-in. If the serial isn't scanned onto the job, the unit's history has a hole exactly where you'll need it.
Put serials on the paperwork. Delivery notes, sub-rental agreements and insurance schedules should list the exact units, not just quantities.
Audit on a cycle. A rolling count of one category per week beats a heroic annual inventory that everyone dreads and postpones.
Mark sold or scrapped units out of service and keep the operational history for the period your business requires. Review retention separately for records containing personal data.

Serial number FAQs

Where is the serial number located on equipment?: Usually on a plate or sticker on the bottom, rear panel or battery compartment of the device — and often duplicated in the firmware menu (look for "About" or "Version") and on the original packaging. For flight-cased gear, check the chassis rather than the case: cases get swapped.
What's the difference between a serial number and an asset tag?: The serial number is assigned by the manufacturer and printed on the unit; the asset tag is a label you apply and control, usually with a barcode or QR code. Best practice is to use both and link them in your inventory system: the tag for fast scanning, the serial for warranties, insurance and resale.
Can two products have the same serial number?: Serial-number uniqueness depends on the manufacturer’s scheme. Keep manufacturer, model and serial together, and assign a separate internal unit code to avoid ambiguity. Investigate duplicates instead of silently overwriting a record.
Do I need serial numbers if I already use barcodes?: Yes. Your barcode identifies the unit inside your system; the serial number identifies it to everyone else — the manufacturer for warranty service, the insurer for claims, the police for theft reports, the buyer at resale. The barcode record should always store the serial behind it.
What should I do if a serial number is missing or worn off?: Check the device menu, purchase records and manufacturer support. If the serial cannot be recovered, assign an internal asset tag and record that the manufacturer serial is unknown; do not invent one. Verify ownership and provenance before buying used equipment with an altered identification plate.