Product Effect in Metal Detection
This webinar details how to overcome product effect to detect more metal in challenging applications
Product effect is the term used to describe instances where signals generated by the characteristics of a product are interpreted by a metal detector as a potential contaminant.
Overcoming product effect can be a challenge when inspecting wet/conductive products such as those in the meat, poultry, seafood or dairy industry segments. It can also be a problem in applications where the product is chilled, cooling or frozen or when products are packaged in metallized film.
Removing the influence of product effect is essential to allow the smallest metal contaminants to be identified and removed from your production line. This in turn protects your brand and the welfare of consumers while increasing profit margins.
This webinar provides an overview of metal detection technology and answers frequently asked questions including:
- Which factors contribute to product effect?
- Why it is important to overcome product effect?
- How can I to reduce false reject rates?
- How can I reduce the risks of a product recall?
- How can I combat product effect without compromising on detection sensitivity?
- What technology should I utilize for optimum performance?
Os metais não são os únicos materiais que têm a habilidade de conduzir eletricidade e gerar campos magnéticos. There are many naturally high product effect (wet) applications with high moisture or salt content, i.e. fresh meat, chicken, fish and bread. These products are likely to produce a signal in the metal detector in the same way as small metal contaminants would. This makes it difficult for the detector to distinguish between the product and the metal contaminant.
The factors that influence the inspection of wet or high product effect products are:
- Moisture content in the product
- Temperature of the product
- Tamanho e formato do produto
- Posição e orientação do produto através do detector
- Consistência ou densidade do produto
- Material da embalagem
- Frequência com a qual o produto é inspecionado
Traditional metal detectors trade-off between the product effect, the maximum operating frequency and metal detector sensitivity. Quanto mais alto o efeito de produto (ou seja, quanto mais úmido o produto), mais baixa é a frequência ideal e a sensibilidade do detector. Em comparação, quanto mais baixo o efeito de produto (mais seco o produto), mais alta a frequência de operação e sensibilidade de detecção. Produtos secos com baixo efeito de produto têm muito pouco impacto no detector de metais em altas frequências, assim o detector pode facilmente detectar contaminantes de metal muito pequenos nessas frequências.
Despite the challenges of product effect, the most sensitive metal detectors on the market operate at more than one frequency simultaneously and are known as Multi-Simultaneous Frequency (MSF) detectors. They address the problem of product effect in an innovative way.
Metal detectors use MSF in combinations of high and low frequencies, simultaneously. Built-in product signal suppression technology, two-stage discrimination for frequency and phase, cancels the information from these frequency combinations to remove the product signal. Isso permite que contaminantes de metais menores sejam detectados. The improvement in detector performance - from the traditional single-frequency metal detectors to the MSF detector can be as much as 50% in product effect or metalized film applications.
In addition to this webinar, you can download our white paper on 'Understanding Challenging Applications' for optimum food safety and quality.
