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Presence Absence Inspection – Genesys

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Home / Applications

Presence / Absence Inspection

Verify parts, caps, labels, seals, screws, inserts, clips, components, or assemblies — confirming every required item is there, in the right place, on every unit that leaves the line, not just the ones someone happened to check.

  • Check Types : 9+ categories
  • Coverage : 100% inline
  • Output : Pass / Fail + Log

Every unit confirmed, not assumed

A missing cap, an absent seal, or a forgotten screw is the easiest defect in the world to describe and one of the most expensive to miss. Manual checks and sample audits catch most of them — but at production speed, “most” means the occasional empty position or unlabeled unit still reaches the customer, usually with a complaint attached.

Vision-based presence / absence inspection checks every unit inline, in milliseconds. It is also one of the most forgiving vision tasks to deploy — often the right lighting and a single compact camera are enough — which is why it is frequently the first inspection station a plant automates.

What we verify

Each item type calls for a slightly different lighting and detection approach.

Parts

Confirm a required part is present in the fixture, tray, or assembly position.

Caps

Check a cap is present and fully seated on the container, not missing or tilted.

Labels

Verify a label has been applied and sits within its expected placement window.

Seals

Confirm foil, induction, or tamper seals are present across the full opening.

Screws

Detect missing screws and fasteners at every position on a housing or panel.

Inserts

Check threaded or metal inserts are present in molded and machined parts.

Clips

Verify retaining clips, circlips, and spring clips are fitted where required.

Components

Confirm every required component is on the board, in the kit, or in the tray.

Assemblies

Check that every sub-component of a finished assembly is in place.

How the setup changes with what’s being verified

A quick sense of what typically drives the setup — the exact tools are always tuned during commissioning.

Parts & Components

Backlighting or high-contrast imaging with blob and pattern-match tools to confirm presence and position.

Caps & Seals

Ring or dome lighting to tame glare from glossy caps and foil, with a region-of-interest check across the opening.

Labels

Diffused lighting to avoid reflection from glossy film, comparing the label area against a reference image.

Screws, Inserts & Clips

Coaxial or dark-field lighting to make small metallic features stand out, checked position by position.

Assemblies

Multiple regions of interest in one image, each tied to a required sub-component and its own pass / fail result.

Sample Data

Missing-item detection rate in sample deployments
0 %
Item types covered across projects
0 +
Units checked vs. sample-based audits
0 %
Industries represented in case studies below
0

Case studies

Presence / absence inspection in the field

Illustrative examples of how a presence / absence system comes together. Replace with real project details and photography.

Before
After
  • Packaging & FMCG
  • Caps & Seals

Catching missing caps and foil seals at line speed

A beverage packer relied on a visual spot check to catch bottles leaving the capper without a cap or an induction seal. A ring-lit smart camera station was added directly after the capper to confirm both on every bottle and trigger a reject before the labeler.

100%

Bottles checked, no sampling

<50ms

Inspection time per bottle

~30%

Fewer missing-seal complaints

Before
After
  • Automotive Components
  • Screws & Clips

Verifying every fastener and clip on a door-module assembly

A Tier 1 supplier was finding occasional missing screws and retaining clips only at the end-of-line functional test, when rework was expensive. A fixed-mount camera with dark-field lighting now checks every fastener and clip position directly after the assembly station.

100%

Positions checked per unit

~40%

Less end-of-line rework

<200ms

Inspection cycle time

Before
After
  • Electronics & PCB
  • Components & Inserts

Confirming component and insert presence on populated boards

Missing connectors and threaded inserts on populated boards were only caught during functional test, long after the value had been added. A high-resolution area scan camera now checks each board against a golden reference immediately after placement.

100%

Boards inspected before test

~25%

Fewer functional-test failures

<300ms

Inspection cycle time

Industries that lean on this application

Packaging & FMCG
Automotive & Auto Components
Electronics & PCB
Pharma & Medical Devices
Food & Beverage

Still relying on a visual check?

Tell us what needs to be present and where it should sit. Our application engineers will recommend the camera, lighting, and lens combination to verify it on every unit.

Talk to an Application Engineer
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