Metal is big. Literally. Pieces of metal cause machinery shutdowns and damage across production lines every day. Sharp edges can cut packaging, processing tools and even workers.
It’s no surprise then that metal has long been the focus of contamination control. From blades to fasteners to wear and breakages, metallic foreign objects are known quantities, and metal detectable products are high stakes for food and sensitive-goods manufacturers around the world.
But while detection technology has come a long way, contamination itself hasn’t gone away. Far from it. In fact, some of the most common and challenging contaminants in today’s factories aren’t metallic at all. They’re hidden and they’ve been much harder to detect.
Introducing the other
Seals, gaskets, O-rings, rubber covers, expansion joints. These non-metallic components are used in some form in nearly every factory that produces food, pharmaceuticals or other sensitive goods. They provide flexibility, seal pressure, prevent leaks and keep processing lines hygienically separate.
Because they’re non-metallic, they’re often assumed to be low-risk. While metal fragments can cause sparks, splinter suddenly and leave obvious trails of destruction, non-metallic components tend to wear away far more subtly.
Over time they may become brittle. Small tears can develop. They can swell, or small pieces can break off without warning.
And if they fail while submerged in a closed system – like inside pipework, ducting UK or processing equipment – detecting that contamination can be incredibly difficult. In some cases, contaminated product may have exited the facility before it is discovered.
Non metal equals low risk
Early metal detection systems were, understandably, designed to detect metal. So traditional technology does a great job at doing exactly that. Unfortunately it struggles with anything that’s not metallic.
Things like rubber seals, plastic gaskets and elastomeric covers are made from materials that metal detectors simply can’t see. So when it comes to these kinds of contamination, factories have historically had to rely on indirect detection methods like preventive maintenance, visual inspection, and scheduled replacement.
And while these methods are absolutely critical, they each come with limitations:
Visual inspections can’t see everywhere
Inspecting seals for wear and tear is an important control measure, but there’s only so much that can be seen by the naked eye. Internal surfaces are often inaccessible for detailed inspection. Parts like gaskets often sit behind other components or panels, creating additional challenges for manual checks.
Maintenance schedules can’t anticipate every eventuality
Preventative maintenance is another important control measure, but it still can’t account for every variable. Every time pressure is exerted, a seal is expanded or contracted. Every time they’re exposed to a chemical cleaning agent, temperature variance or come into contact with raw material, they’re one step closer to failure.
Handling introduces human error
Ideally, seals are handled as little as possible. But maintenance schedules, preventative care and general replacement inevitably requires them to be manipulated by humans. And every time they’re handled, there’s risk of damage or wear.
Add it all up and you’re left with contamination that’s historically been near-impossible to detect until it’s too late.
And while that might be acceptable in some industries, processing lines handling food, pharmaceuticals and other sensitive materials cannot afford to wait for contamination to happen. Instead, they’re turning to a better way.
Design it out
Food safety isn’t just about detecting contamination. It’s about preventing it wherever possible. Regulatory requirements, customer demands and brand protection have pushed contamination prevention to the forefront of processing line design. It’s a trend that shows no signs of slowing.
Detectable design allows manufacturers to prevent contamination by making invisible risks visible. By adding microscopic metallic particles to rubber seals, plastic gaskets and elastomeric covers, they can be detected by existing metal detection systems.
It’s not about reinventing metal detection tech. It’s about expanding what it can find.
It means that if a seal (or piece of a seal) does enter the production process – whether through normal operation or during maintenance – it can be detected immediately. Swift action can be taken to remove the contamination risk before the product has to be scrapped or a recall is required.
Food safe. Automatically.
Since detectable design components are made with tiny metal particles embedded into their material, they work seamlessly with existing metal detection systems. No need for expensive upgrades or safety compromises. Customers don’t have to choose between functionality and food safety. They can have both.
Another often-overlooked dimension of non-metallic contamination risk is its impact on audit readiness and traceability. Customers and regulators expect manufacturers not only to comply with standards, but to demonstrate how risks are identified, monitored and mitigated across the entire production lifecycle. Non-metallic components that cannot be detected introduce uncertainty into this narrative, creating gaps in documented control strategies.
Detectable non-metallic parts, by contrast, allow manufacturers to evidence a more robust and transparent risk management approach, strengthening audit outcomes and reinforcing confidence among customers, insurers and certification bodies.
Improving detectability is not only a matter of safety and compliance, but also of operational resilience and responsible manufacturing.
