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Metal Detection Systems

Metallic impurities in your product can always occur, no matter how careful your processes are. It is critical to remove metal contaminants before they damage production machinery or even the customer. CASSEL Inspection is pleased to offer several metal detection systems to protect your products. A CASSEL metal detector reliably detects all metal contamination and offers protection against machine damage, production downtime, unhappy customers, and product recalls.
A grey CASSEL Inspection Metal Detection System, labeled Metal Shark, is isolated on a white background.

Industrial Metal Detectors

Our robust and reliable industrial metal detectors help prevent damage and ensure product safety.

We Protect Your Products

Regardless of whether contamination consists of iron, steel, stainless steel or non-ferrous metals such as aluminum, copper and brass, whether it is exposed or enclosed in the product: our metal detection systems detect all metallic foreign bodies using 4-quadrant technology. They send a signal to the process control system and eject the contaminated products fully automatically with fast-switching separation systems.

Our devices for the food industry comply with norms and standards such as IFS, BRC and FSMA.

A close-up view of a Metal Shark metal detector for conveyors.

Our 3-Factor Reliability Promise

Our products are built with three reliability promises. Long service life, no false detection incidences, and ongoing aftermarket support. Learn more in this video.

Metal Detectors Overview

CASSEL Inspection metal detection equipment isolated on a white background.

Better Sensitivities

Superior sensitivity is key to the success of our metal detection equipment. This is achieved using a small phase-out area to minimize the product effect, along with automated scan frequency adjustment that avoids conflicts with nearby signals. Our metal detection systems also employ multiphase technology to continuously monitor and rotate the product phase angle and apply specialized filtering to boost the contaminant signal.

Reliable Detection Performance

Of course, reliable detection is paramount to equipment and product safety. Our metal detection systems are consistently tested to ensure peak performance. We regularly outperform the industry in these tests, a testament to our dedication to continuously optimizing our software. While high sensitivity of metal detection technology is vital, we are aware of striking a balance against the occurrence of false positives, and manage this challenge through our fine-tuned processes.
A metal detection system is operating in an industrial setting.

Metal Detection Systems FAQs


How do metal detection systems work?

An industrial metal detector senses disturbances in a balanced electromagnetic field, indicating the presence of metal contamination. A digital signal processor analyzes the signals to detect the contaminant but must ignore the product. Superior systems use special filtering to boost the contaminant signal for better sensitivity.


What is detectable by metal detection technology?

Metal detection equipment will detect ferrous and non-ferrous metals only. To be detectable, metals need to be conductive, magnetic, or both.

  • Ferrous – These metals contain iron. Ferrous metals have both magnetic and conductive properties. They are easy to detect.
  • Non-ferrous – Examples include aluminum, copper, tin, lead, brass, and silver. Nonferrous metals are conductive but non-magnetic. They are slightly more difficult to detect.

What is multiphase technology and how does it handle product effect?

Product effect occurs in metal detection systems because most food items are conductive or magnetic. For example, iron-rich food such as fortified cereals or red meat will mimic the presence of metal contamination and cause the signal to become unbalanced. In addition, moist or salty foods such as deli meats or salty crackers are conductive and can have a similar effect. Multiphase technology offers a superior method for handling product effect. Continuous adjustment to the temperature and orientation of the product changes the phase angle for improved sensitivity. And the existence of a contaminant is not determined until the product has passed fully through the aperture.


What is the longevity of a metal detector?

An industrial metal detector, on average, can last up to 20 years and sometimes even longer.  CASSEL Inspection works with every customer through the life of their system to support service needs and to ensure optimal performance.


How do you test an industrial metal detector?

Frequent testing must be performed on all metal detection equipment. For valid sensitivity rating, the standard protocol is to use a metal sphere embedded in plastic, running from 0.3mm to 10mm in diameter. The sphere must pass through the center of the aperture, where the weakest signal is. Metal spheres are used because of their consistent shape, which means there is no orientation effect. Ferrous, non-ferrous, and type 316 stainless steel should all be tested, one after the other.

CASSEL metal detector equipment is inspected annually (at a minimum) by a neutral third party to ensure that industry standards are met.


What are the different applications for an industrial metal detector?

Metal detection technology can be useful for inspecting a vast range of products. It is commonly used to assess the safety of packaged products. For example, any product in the grocery store might be inspected using metal detection equipment, typically after packaging. Unpackaged bulk flow products can also be inspected during processing, as well as pipeline products such as soups, slurries, or dairy products. Other important applications for metal detection systems include pharmaceuticals, recycled goods, and non-woven materials.


What kinds of contaminants are detectable in a typical metal detector?



How small of a metal contaminant can be detected in a metal detector?



Is metal detection or X-ray inspection better for my application?



What’s the best sensitivity I can get on my X-ray system?



Are CASSEL inspection detection systems customizable?