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Frequently Asked Questions
What is the difference between a Metal Detector and an X-Ray Inspection System?
A Metal Detector is best for identifying ferrous, non-ferrous, and stainless steel contaminants and is generally more cost-effective. An X-Ray system is more advanced; it detects metal but can also identify non-metallic contaminants like glass, stone, ceramic, high-density plastic, and bone, making it ideal for products where these risks are present.
Why does the metal detector trigger a "false positive" when inspecting wet or salty food?
This is known as the "Product Effect." Wet, salty, or acidic foods (like meat, cheese, or pickles) are conductive and can create a signal similar to metal. HSYL metal detectors feature phase-adjustment technology to ignore this specific product signal while still detecting actual metal contaminants.
What is a Checkweigher used for, and how does it save me money?
A Checkweigher automatically weighs 100% of your products on the line to ensure they meet specified weight limits. It saves money by reducing "product giveaway" (overfilling) and protects your brand reputation by rejecting underfilled packages that violate labeling regulations.
Where is the best place to install a metal detector on my production line?
This depends on your Critical Control Points (CCP). Generally, it is recommended to inspect at the end of the line (after packaging) to ensure no contamination occurred during processing. However, inspecting raw ingredients early (bulk inspection) can protect your downstream machinery from damage.
What types of rejection mechanisms are available for different products?
The rejection method depends on your product type. "Air Blast" is ideal for light, fast-moving items; "Pusher" arms are best for boxes or rigid containers; "Drop Flaps" are used for bulk loose powders; and "Retracting Belts" are often used for delicate or multi-lane applications.
How often should I test or calibrate the inspection equipment?
To comply with HACCP and GFSI standards, functionality tests using certified test pieces (Ferrous, Non-Ferrous, Stainless Steel) should typically be performed at the start of a shift, at every product changeover, and at regular intervals (e.g., every hour) during production.
Can HSYL inspection systems handle high-pressure washdowns?
Yes, for food processing environments requiring rigorous hygiene, we offer systems with IP66 or IP69K ratings. These are designed with waterproof seals and stainless steel construction to withstand high-pressure, high-temperature washdowns without damaging the electronics.
What is a "Combo System" and why should I consider it?
A Combo System integrates a Metal Detector and a Checkweigher onto a single frame. This saves valuable floor space, reduces the need for separate conveyors, and provides a centralized interface for managing both quality control (contaminants) and weight control.
Does packaging material affect metal detection sensitivity?
Yes. If your product is packaged in aluminum foil or metallized film, a standard metal detector will not work effectively. In these cases, you must use a "Ferrous-in-Foil" detector or, ideally, an X-Ray inspection system, which can see through metallic packaging.
What happens if the power goes out? Do I lose my settings?
No. Modern industrial inspection systems utilize non-volatile memory to store product presets and sensitivity settings. When power is restored, the system retains all historical data and configuration parameters, allowing for a quick restart.