Metal Detection

  1. Metal Detectable vs. X-Ray

    Metal Detectable vs. X-Ray

    Adopting effective methods to detect and prevent foreign contaminants from entering the food supply chain is crucial for the food processing industry. Metal contaminants, such as broken machinery parts or small, and other foreign objects pose a significant risk to consumer health and can damage brand’s reputation. To mitigate these risks, food processors rely on advanced technologies like metal detection and X-ray inspection systems. Outlined below are the differences between metal-detectable and X-ray methods, highlighting their unique capabilities and applications in ensuring food safety.

     

    Metal Detectable:

    Metal detection systems are common throughout the industry, providing a reliable means of identifying and removing metallic contaminants from food products. These systems use electromagnetic fields to detect the presence of ferrous, non-ferrous, and stainless-steel metals. Smaller objects that are unavoidable around the production area s

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  2. What should I look for when selecting a metal detectable pen?

    What should I look for when selecting a metal detectable pen

    Metal detectable products are becoming increasingly common within the food industry, It is essential to understand the different features and how they can impact you. As always, the priority is ensuring the highest standards of safety are maintained. Pen features vary significantly, so choosing the right pen to suit your needs is essential.

    Here are some factors you need to consider when selecting your metal detectable stationery.

    Is the most detectable pen the best option?

    While it may sound counterintuitive, the pen made from the most detectable plastic might not be the best option. Small amounts of ferrous material are added to the plastic mix to make plastic detectable. Simply put, the higher the ferrous material in the mix, the more detectable the plastic is. However, this both makes the

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  3. How do metal detectors work?

    How do metal detectors work

    Metal detection systems have become an integral part of the foreign body prevention process in food processing facilities. 

    Possibly nowhere is product integrity more important than in food and beverage production. As well as continuous improvement teams, technical and quality personnel are constantly looking for ways to reduce ‘foreign body’ and contamination risks. With metal being one of the most frequent offenders, leading food and pharmaceutical manufacturers have for a long time used specialist metal detectors to control this risk.

    A simplified look at how this works:

    1. The most common metal detectors are based on a balanced coil design.

    2. This involves passing the product through three coils.

    3. The middle coil acts as the transmitter by using an electrical current to create a magnetic field.

    4. The transmitter induces a current in the other two coils, which are spaced equidistant from the middle coil. The out

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  4. 7 factors to consider when setting your metal detector frequency

    7 factors to consider when setting your metal detector frequency

    When setting up your metal detector, your core variable is the metal detector frequency. Here we look at 7 other factors you need to take into account.

    1. Product characteristics

    Every product creates a ‘background signal’. Don’t worry – this is not metal in your product, just characteristics which behave the same as metal when going through the detector! Food stuffs loosely fall into two categories – “dry product” and “wet product”. Dry products (eg, dried pasta, snacks) create a much lower background signal. By contrast, wet products (eg dairy, ready meals) create a much higher signal. If the detector frequency is too high, the background signal will trigger your detector. As a result, product will be falsely rejected.

    TIP: Find out the background signal of your products – run them through the detector, increasing the frequency until it starts rejecting product.

    2. Metal type

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