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China, Chinese Inline Metal Detection in Seafood Industry1 Industrial Products Supplier Manufacturer Details, price list catalog:
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DetectorMetal Detector for FoodInline Metal Detection SystemInline Ferrous Metal Detection
Dongguan Viking Technology Co., Ltd.
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Product Description Product Description Tunnel Aperture Metal Detector Head for Universal IndustriesIntroductionMetal contamination is a critical concern across a broad range of industries-from food processing and pharmaceuticals to textiles, plastics, mining, and wood production. To mitigate contamination risks, protect brand integrity, and ensure regulatory compliance, manufacturers rely on robust, adaptable detection solutions. Among the most versatile of these is the Tunnel Aperture Metal Detector Head.Designed to deliver high-sensitivity detection of ferrous, non-ferrous, and stainless-steel contaminants, the Tunnel Aperture Metal Detector Head is engineered for universal industry applications. It offers flexible installation, seamless integration with conveyors or drop-through systems, and reliable operation even in challenging environments.This product introduction covers its functionality, technical capabilities, configurations, industry applications, and return on investment, making it a go-to solution for contamination control in diversified industrial processes. 1. What is a Tunnel Aperture Metal Detector Head?A Tunnel Aperture Metal Detector Head is the core component of a metal detection system. It consists of a rectangular or round aperture that creates an electromagnetic field. When a product passes through this aperture, any metal contamination causes a disturbance in the field, which is then detected by the system.Unlike full conveyor units, the tunnel head is often sold standalone for custom integration into existing conveyor systems, chutes, or gravity-fed lines. This flexibility makes it ideal for universal industries where space, layout, or product flow may vary. 2. Key Features2.1 Wide Detection RangeDetects ferrous (Fe), non-ferrous (Cu, Al), and stainless steel (SUS) particlesAvailable in both single-frequency and dual-frequency modelsHandles a wide range of product effects, from dry powders to moist or conductive materials2.2 Customizable Aperture SizesAperture widths from 100mm to 1500mmHeights from 50mm to 800mmRound apertures available for pipeline applicationsDesigned to fit conveyors, chutes, drop-throughs, or vertical pack lines2.3 High SensitivityCapable of detecting:Fe ≥ 0.3 mmSUS ≥ 0.5 mmNon-ferrous ≥ 0.4 mmSensitivity adjusts based on aperture size and product characteristics2.4 Advanced Signal ProcessingDigital Signal Processing (DSP) and phase tracking eliminate product effectCompensates for temperature, moisture, and packaging material variationsFeatures auto-learn functions for rapid product setup2.5 User-Friendly InterfaceColor touch screen with multilingual optionsReal-time signal strength displayUp to 100+ product presetsPassword-protected multi-level access2.6 Connectivity & IntegrationRS232/485, Ethernet, USB portsCan be connected to:Reject mechanismsPLC systemsSCADA/ERPAlarm and printer systems 3. Technical SpecificationsFeatureSpecificationAperture SizesWidth: 100-1500 mm; Height: 50-800 mmDetection TypesFe, Non-Fe, SUSSensitivity RangeFe ≥ 0.3mm; SUS ≥ 0.5mm (depends on product)Frequency Range50 kHz-900 kHzOperation ModesDry / Wet / Auto-learnDisplay Interface7" or 10" Color TouchscreenMemory CapacityUp to 200 product profilesAlarm OutputVisual, audible, and digital (relay)Protection GradeIP65 / IP66 / IP69K (for food models)Power SupplyAC 110-240V, 50/60HzCompliance StandardsCE, ISO9001, HACCP, BRC, FDA, IFS 4. Applications by IndustryThe Tunnel Aperture Metal Detector Head is suited for diverse industries due to its modularity and sensitivity:4.1 Food IndustryDetects metal in packaged and unpackaged goodsCommon uses:Bulk grains, nuts, and powdersDairy blocks, frozen meals, bakery productsMeat, poultry, seafood4.2 PharmaceuticalsDetects small metal shards in tablets, capsules, or powdered supplementsOften integrated before bottling or packing lines4.3 Plastics & RubberUsed to detect tramp metal in plastic pellets, flakes, or raw materialsPrevents damage to molding equipment and ensures final product quality4.4 Textiles & GarmentsInspects finished clothing for broken needles or tagsPrevents defective deliveries to brands or retailers4.5 Mining & AggregatesInstalled on conveyors to prevent crusher damage from embedded metalWithstands high-dust, high-load environments4.6 Wood and PulpDetects nails, staples, and embedded hardware in lumberHelps protect saw blades and improve pulp quality4.7 RecyclingSeparates ferrous and non-ferrous metals from mixed material streamsPre-treatment step for downstream processing or shredding 5. Integration OptionsThe metal detector head can be installed:Over conveyor beltsInside vertical drop chutesOn horizontal packaging linesBefore filling/sealing machinesInline with metal reject systemsAvailable Accessories:Stainless steel mounting framesAir-jet or pusher rejectorsLockable reject binsBelt stop systemsAlarm signal beacons 6. Compliance and Safety StandardsThe tunnel aperture metal detector complies with:HACCP (Hazard Analysis Critical Control Point)BRC (British Retail Consortium)IFS (International Featured Standards)FDA & USDA (for food-grade models)CE certification for electrical safety and EMCOptional OIML legal metrology compliance 7. Key Benefits1. Universal ApplicationWorks with multiple product types and production environmentsIdeal for OEM system builders or factories with variable output2. Customization FlexibilityAperture size and sensitivity tailored to your applicationCompatible with custom conveyors or OEM designs3. High AccuracyDetects small, hard-to-find stainless steel particlesMinimizes false rejects with product effect compensation4. Reduced DowntimeAuto-learn and auto-calibration simplify product changeoversDigital diagnostics alert for early fault detection5. Long-Term ROIProtects downstream machineryPrevents product recalls and reputation damageMeets buyer and retailer food safety standards 8. Case StudiesBakery Processing Line - GermanyNeeded metal detection for 10+ SKU formats on a high-speed lineChose a tunnel head integrated with existing belt and pusher systemResult: Detected 0.4mm steel flakes from worn mixers; passed IFS auditPlastic Pellet Manufacturer - USAMetal bits from raw bulk shipments were damaging extruder screwsTunnel head installed before hopper intakeReduced downtime by 35%, saving $25,000/year in equipment repairsGarment Exporter - BangladeshInstalled tunnel detector for post-sewing inspectionDetected broken needles in 1 out of every 5,000 unitsHelped secure compliance with European brand partners 9. Maintenance and SupportSelf-checking function with every startupAuto-calibration for each new product profileMinimal consumables or moving partsAvailable service contracts for:Annual calibrationSoftware updatesEmergency technical supportRemote diagnostic support via Ethernet 10. Return on InvestmentEstimated ROI: 6-12 monthsWhy?Prevents expensive recallsAvoids machine damageMeets regulatory inspectionsImproves production confidenceA single recall or equipment failure could cost tens of thousands in downtime and liability-this system pays for itself quickly. ConclusionThe Tunnel Aperture Metal Detector Head is the ideal contamination control solution for companies across universal industries. Its compact, modular design, advanced signal processing, and broad compatibility make it an indispensable tool for inline quality control.Whether you're operating in food, pharma, recycling, textiles, or mining, this metal detector head delivers consistent performance, protects your products, and helps your operation stay compliant with global safety standards. Request a Quote or Technical DrawingLooking to install a tunnel detector head into your line?Contact us for custom aperture sizingReceive a 2D/3D CAD drawingSchedule an on-site or virtual demoAsk about global shipping and OEM integration 1. IntroductionA conveyor metal detector is a crucial device across diverse industries, safeguarding product quality and consumer safety. It's engineered to spot metallic contaminants within items transported on conveyor belts, preventing potential harm from metal fragments and shielding machinery. 2. Working PrincipleThis detector functions on electromagnetic induction. A transmitter coil generates a magnetic field above the conveyor. When a metal object passes through, it disturbs the field. The receiver coil detects this disruption and relays an electrical signal to the control unit. Advanced models use algorithms to filter false positives from vibrations or electrical interference, ensuring precision. 3. Types of Conveyor Metal Detectors3.1. Balanced Coil Metal DetectorsThe most prevalent type, featuring precisely balanced coils. Their electrical equilibrium is disrupted when metal enters the zone, triggering an alarm. Renowned for high sensitivity and stability, they're ideal for food and pharmaceutical sectors where minute contaminants matter. 3.2. Pulse Induction Metal DetectorsThese emit short, powerful magnetic pulses. Metal objects induce eddy currents, generating a secondary magnetic field that's detected. Great for spotting larger, deeply buried metals, they're common in mining and recycling to handle bulk materials with potential big metal pieces. 3.3. Multi-frequency Metal DetectorsOperating at multiple frequencies, they adapt to different product traits. In food production, where products vary in moisture and density, they optimize detection by adjusting frequencies, cutting false alarms. 4. Key Components4.1. Conveyor BeltMade of non-metallic materials like polyurethane, it must be properly sized and speed-set for the application. A food packaging line might need a wide, fast belt for high volume while ensuring inspection quality.4.2. Detection HeadHousing transmitter and receiver coils, it creates a uniform magnetic field. Its dimensions vary with product size; sometimes multiple heads are used for comprehensive detection.4.3. Control PanelThe operator's interface, showing detection results and settings. Modern ones are touchscreen, with data logging for quality control and traceability.4.4. Reject MechanismWhen metal's detected, mechanisms like pneumatic pushers or flap diverters remove the item. The choice depends on product attributes and conveyor layout. 5. Applications5.1. Food IndustryEssential from ingredient to packaging stages, it stops metal from processing equipment getting into food. In canned goods or bakery items, it ensures safety and quality.5.2. Pharmaceutical IndustryMust-have for drug manufacturing to screen tablets, capsules, etc. Tiny metal specks in injectables can endanger patients, so detectors maintain sterility.5.3. Packaging IndustryPrevents metal objects from being packaged with consumer goods. In electronics assembly, it avoids mispacked screws, reducing returns.5.4. Recycling IndustrySeparates metals from waste on conveyor belts, enhancing recycling efficiency and aiding environmental conservation. 6. Factors Affecting Detection Performance6.1. Product CharacteristicsMoisture, salt content, size, and shape of products can interfere with detection. High-moisture fruits or salty pickles might cause false alarms or misses.6.2. Conveyor Belt SpeedFaster belts reduce product exposure time, risking missed detections. But slowing down too much hampers production flow; a balance is key.6.3. Environmental InterferenceNearby machinery or power lines can disrupt the detector. Shielding and vibration-damping measures combat electromagnetic interference and vibrations.6.4. Metal Type and SizeFerrous metals are easier to detect than non-ferrous or some stainless steel grades. Smaller objects are harder to spot and demand higher sensitivity. 7. Installation and Calibration7.1. InstallationPlace the detector stably, level the platform, and install the conveyor belt smoothly. Position the detection head correctly and allow clearance for maintenance.7.2. CalibrationRegularly calibrate using known metal samples to set sensitivity levels. Some advanced models have automatic calibration for operator ease. 8. Maintenance and Troubleshooting8.1. MaintenanceClean the belt, inspect the detection head and electrical connections, and lubricate moving parts to prolong the detector's life.8.2. TroubleshootingFor false alarms, check interference and adjust settings. If detection fails, examine calibration, the detection head, or belt speed.Product Parameters Details Tunnel size 40*12cm40*15cm40*20cm50*15cm50*20cm50*25cm50*30cmSensitivity Fe(mm)0.81.01.21.01.21.52.0Sensitivity SUS(mm)1.52.02.52.02.53.03.5Detection height 120150200150200250300Detection width 400500Belt speed 10-35 meters per minute adjustable Alarm method Light and sound and optional reject
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