UV inspection lamps for detecting shell and cartilage in crab meat

Why shell and cartilage in crab meat is a quality problem

Even with careful hand picking, small fragments of shell and cartilage can remain in crab meat. They are hard to see under normal white light, particularly in wet or mixed product. Missed fragments can lead to customer complaints, rejected batches, returns and damage to your brand.

How does UV light detect shell and cartilage in crab meat?

Shell and cartilage naturally fluoresce under UV-A light at 365 nm, appearing as bright glowing spots, while the meat stays comparatively dark. This contrast lets inspectors see fragments that white light hides. No dyes, consumables or product contact are needed.

Benefits of UV inspection for crab meat processing

• Clear contrast: Fragments glow against dark meat, making them easier to find.
• Quick and simple: Use at the picking table, on the line or during final checks with no complicated setup.
• Non-contact and non-destructive: Product is inspected without being cut, stained or damaged.
• Fewer complaints and rejections: Catching fragments before packing protects quality and brand reputation.
• Low running costs: No consumables, and easy to add to your existing quality checks.

Built for wet processing environments

Crab processing is wet, and equipment needs to cope. Our UV-A inspection lamps offer:

• High UV-A output at 365 nm, the wavelength that produces strong fluorescence in shell and cartilage
• IP65 rating, protected against dust and water jets, so suitable for damp and wet areas
• Practical, durable and compact design for everyday use on the processing floor

Who uses UV inspection for crab meat?

UV inspection is used by crab processors, seafood packers and picking facilities that want an extra check for shell and cartilage before product leaves the site. It also suits quality teams that want a low-cost inspection step alongside their existing checks.

Frequently asked questions about UV inspection of crab meat

Can UV light detect shell in crab meat?

Yes. Shell fragments fluoresce under 365 nm UV-A light and appear as bright spots against the darker meat. This makes them easier to see than under normal white light, so inspectors can find and remove them before packing.

Can UV light detect cartilage in crab meat?

Yes. Cartilage typically fluoresces under UV-A light too, so it stands out from the meat. Results can vary with species, freshness and processing, so we recommend trialing on your own product.

What is the best UV wavelength for inspecting crab meat?

365 nm UV-A is widely used for fluorescence inspection, and it’s the wavelength our lamps are built around. A high output at this wavelength gives strong fluorescence and clearer contrast.

Are your UV lamps suitable for wet environments?

Yes. Our lamps are IP65 rated, which means they’re protected against dust and water jets, so they’re suitable for damp and wet processing areas.

Does UV inspection replace metal detection or X-ray?

No. UV inspection is a visual check for shell and cartilage, which metal detectors can’t find and X-ray may miss. It works best alongside your existing foreign body controls, not instead of them.

Is UV inspection safe for food and operators?

UV-A inspection is non-contact and doesn’t alter the product. Operators should wear UV-blocking eye wear and follow your site’s safety guidance. Join a free UV safety webinar to learn more about UV safety in the workplace.

Where should UV inspection be used in a crab processing line?

Common points are at the picking table, after picking and before packing. Many processors also use it for spot checks and final quality checks.

How do I choose the right UV lamp for crab meat inspection?

Consider the working distance, inspection area, portability and whether you need handheld or fixed mounting. Get in touch and we’ll recommend a lamp for your process.

Get a recommendation or quote

Not sure which UV lamp suits your crab meat inspection process? Tell us about your set-up and we’ll recommend the right lamp, or arrange a demonstration.