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?

Two units of the same model from the same manufacturer shouldn't — that's the manufacturer's guarantee. Across different manufacturers, collisions are entirely possible, which is why your system should identify units by manufacturer + model + serial, not by serial alone.

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 firmware menu and the purchase invoice first — the serial is often recoverable from either. If it's genuinely gone, assign your own asset tag, photograph the unit, and note the missing serial on your insurance schedule. Be cautious buying used gear with removed serials: that's a classic marker of stolen equipment.

Resources · Blog/March 12, 2024·Updated May 18, 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?

When a camera body, wireless receiver or moving head leaves the factory, the manufacturer stamps, engraves or prints an identifier on it that no other unit carries. That identifier — the serial number — usually lives on a plate or sticker near the battery compartment, the base plate or the rear panel, and is often repeated in the device's firmware menu and on the original box.

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?

Because losses hide in aggregates. If your system only knows you own "12 × SM58", a missing microphone is invisible until a physical count — often months after it walked off a stage. If every unit is serialized, the gap shows up at the next check-in, tied to a specific job, client and crew.

Serial-level tracking is also what makes the paperwork defensible. Warranty and repair claims require the serial. Insurance schedules list gear by serial, and a claim without one is a negotiation. Police reports and stolen-equipment registries work exclusively off serial numbers. And when a client disputes a damage charge, "unit S/N 4523118 left with zero scratches on 12 May, photographed" ends the conversation in a way "one of our lenses" never will.

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 standard — every manufacturer designs its own scheme. Most formats encode some mix of production site, date or batch, and a sequential unit count. A few typical patterns:

Where you'll see it	Example format	What it typically encodes
Camera body	S01-4523118	Plant or region prefix + sequential unit number
Wireless mic system	1BZ08 4521234	Date/batch code + unit sequence
Laptop / compute	C02XG2JHJG5H	Factory, year and week of manufacture, config ID
Lens	2847591	Plain sequential number, no structure
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. A photo settles every future dispute about transcription errors, and documents condition on day one.
Pair every serial with a barcode or QR asset tag. Serial plates are tiny, engraved and dark; scanning your own label takes a second and writes to the right record every time.
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.
Retire serials, never delete them. A sold or scrapped unit keeps its history; next year's insurance renewal or tax question will thank you.

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?: Two units of the same model from the same manufacturer shouldn't — that's the manufacturer's guarantee. Across different manufacturers, collisions are entirely possible, which is why your system should identify units by manufacturer + model + serial, not by serial alone.
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 firmware menu and the purchase invoice first — the serial is often recoverable from either. If it's genuinely gone, assign your own asset tag, photograph the unit, and note the missing serial on your insurance schedule. Be cautious buying used gear with removed serials: that's a classic marker of stolen equipment.