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Europe: Metal detector without ‘product effect’


Mettler-Toledo Safeline launches a metal detector that produces up to 95% less false rejects by combining Multi-Simultaneous Frequency (MSF) and Product Signal Suppression technology.

The Profile Advantage system helps to overcome ‘product effect’ in bakery, meat, poultry, seafood, ready meals and dairy food.

For years, finding the smallest metal contaminants has been a challenge for many bakery, meat, poultry, seafood, ready meal and dairy food producers due to a phenomenon known as ‘product effect’.

Product effect (where a product’s own characteristics inhibit a metal detector’s ability to inspect products with a high moisture or salt content, variable temperature, or packed in metallized film) has reduced detection sensitivities significantly below the levels achieved when inspecting dry non-conductive food products.

Using a sophisticated inspection algorithm, the Profile Advantage metal detector all but removes product effect from the process.

The result is up to 50% improvement in spherical sensitivity levels, compared to conventional metal detectors, enabling significantly smaller metal contaminants to be detected in products that are wet, hot, chilled, cooling or packaged in metallized film.

Central to the Multi Simultaneous Frequency (MSF) technology of the Profile Advantage is the ‘3S’ algorithm and its Product Signal Suppression feature.

Unlike conventional metal detectors which simply capture and store the active product signal, the Profile Advantage modifies the signal during setup so that the food product presents itself as if it were a dry product without product effect.

The detector can therefore inspect meat, dairy and bakery products that contain a high degree of moisture – a factor that triggers many false rejects in conventional metal detectors.

Traditionally the solution to this problem has been to set the sensitivity of the metal detector lower to eliminate false rejects, thereby limiting its ability to detect all contaminants.

By suppressing those false signals, the Profile Advantage inspects products at full sensitivity, ensuring more effective inspection and maximizing product safety.

Meat and poultry producers, for example, typically see false reject rates associated with product effect reduced by up to 95% when trying to detect the smallest metal contaminants.

The Product Signal Suppression feature can cope with challenging applications of wet, moist, high salt content products or those that are in a state of flux cooling or thawing, and products packaged in metallized film.

This packaging type has traditionally made it more difficult for detectors to compete with other types of technology on performance.

However, with MSF technology, the Profile Advantage can meet or exceed factory inspection standards on all metal types and delivers considerably higher performance when detecting aluminum contaminants.

The machine has a built-in Condition Monitoring as standard.

By continually analyzing the detector’s performance, Condition Monitoring provides advance warning of potential problems, enabling maintenance to take place during scheduled downtime, maximizing productivity and uptime.

On-board OEE reporting is also included with every Profile Advantage metal detector.