Conveyor Metal Detectors
Conveyor metal detectors from Bunting are engineered to detect ferrous, nonferrous, stainless steel, and even difficult-to-detect manganese steel contaminants in a wide range of conveyed materials. Available in one-piece, two-piece, and under-belt configurations, these systems serve critical roles in food processing, plastics processing, recycling, and heavy-duty bulk handling applications such as aggregate, mining, and minerals. Depending on the setup, detectors can be installed around the conveyor frame or directly beneath the belt to inspect product as it moves through the line.
By identifying metal contamination before it reaches crushers, extruders, packaging machines, or grinders, Bunting conveyor metal detectors help manufacturers avoid equipment damage, product recalls, and costly downtime. When paired with automatic reject mechanisms or used in combination with magnetic separation equipment, they provide a comprehensive metal control solution. Whether protecting a food brand or preventing tramp metal from destroying quarry equipment, these detectors deliver peace of mind, operational efficiency, and long-term cost savings.















One-Piece Tunnel Style Metal Detectors
Applications
Food processing, packaging, and ingredient handling
Materials Handled
Packaged and unpackaged products, frozen foods, baked goods, bulk powders, grains, spices, dairy, meats, and snacks
Benefits
- High-sensitivity detection of ferrous, nonferrous, and stainless steel contaminants
- Hygienic one-piece design for easy cleaning and washdown compatibility
- Integrated system with digital signal processing for high-speed accuracy
- Supports HACCP, FSMA, FDA, USDA, and GFSI compliance
- Seamless integration with pushers, diverters, or air blast reject systems
- Low-maintenance operation with durable construction for 24/7 environments

Two-Piece Tunnel Style Metal Detectors
Applications
Plastics processing, recycling, food, and general manufacturing
Materials Handled
Shredded plastic, granules, pellets, bulk fiber, packaged food, and conveyed product on non-metallic belts
Benefits
- High-sensitivity detection of ferrous, nonferrous, and stainless-steel contaminants
- Split-coil design enables installation around existing conveyors without belt removal
- Ideal for retrofitting inspection capabilities into space-constrained or complex conveyor layouts
- Compatible with reject systems and integrates easily into automation environments
- Corrosion-resistant construction options for washdown or industrial settings
- Supports regulatory compliance and quality assurance programs across industries

Two-Piece Tunnel Style Metal Detectors
Applications
Quarrying, mining, mineral processing, and bulk material handling
Materials Handled
Sand, gravel, crushed stone, coal, limestone, gypsum, and bulk raw materials on non-metallic conveyor belts
Benefits
- High-sensitivity detection of ferrous, nonferrous, stainless steel, and hard-to-detect manganese steel contaminants
- Split-frame design enables easy installation around existing conveyors without belt removal
- Engineered to locate non-magnetic tramp metal such as drill bits, bucket teeth, and manganese crusher liners
- Prevents equipment damage and reduces downtime by stopping tramp metal before it reaches crushers or screens
- Weather-resistant construction built for harsh outdoor and dusty environments
- Reliable, low-maintenance operation in high-throughput, heavy-duty processing lines

Under-Belt Metal Detectors
Applications
Mining, recycling, biomass, wood processing, glass, and bulk material handling
Materials Handled
Sand, gravel, coal, shredded plastics, biomass fuel, wood chips, cullet, raw silica, and other bulk conveyed materials
Benefits
- Installs beneath non-metallic conveyors to detect tramp metal without disrupting material flow
- Detects ferrous, nonferrous, and difficult-to-detect manganese steel contaminants
- Protects shredders, crushers, chippers, grinders, and downstream equipment from metal damage
- Reduces downtime, repair costs, and production losses across multiple heavy-duty industries
- Interfaces with alarms, marker systems, and stop-on-detect controls for rapid response
- Customizable sensitivity for varying burden depths and material types
- Built for harsh, dusty environments with heavy-duty components and minimal maintenance

Metal Detector Conveyor
Applications
Food processing, packaging, and quality control
Materials Handled
Packaged and unpackaged food products, finished goods, and bulk items on conveyor belts
Benefits
- Integrated conveyor and metal detector system for seamless inspection and conveyance
- Detects ferrous, nonferrous, and stainless-steel contaminants with high accuracy
- Available in a range of tunnel sizes, belt widths, and reject configurations to suit your line
- Built with stainless steel construction and sanitary design for food-grade environments
- Simplifies installation with plug-and-play operation—no separate integration required
- Improves product safety, reduces recalls, and supports regulatory compliance (FDA, USDA, CE)
- Designed for 24/7 production with minimal maintenance and reliable performance

Metal Detector Conveyor
Applications
Plastics recycling, shredding, granulating, and extrusion operations
Materials Handled
Shredded plastic, scrap material, regrind, and recycled plastics prior to size reduction or extrusion
Benefits
- Detects and removes ferrous, nonferrous, and stainless-steel contaminants before material enters shredders, granulators, or extruders
- Prevents equipment damage by stopping metal before it is reduced to smaller, harder-to-separate pieces
- Maximizes product purity at both the shredder infeed and granulator discharge
- Integrated metal detector and conveyor solution designed to fit directly into recycling workflows
- Improves overall system efficiency by reducing downtime and minimizing costly repairs
- Available with custom paint and configuration options to match your shredder system and plant layout

Checkweigher
Applications
Food packaging, pharmaceuticals, nutritional products, and bulk goods
Materials Handled
Packaged foods, bottles, bags, cartons, sachets, powdered ingredients, and consumer goods
Benefits
- Combines high-accuracy weight inspection with metal detection in a single inline system
- Uses Electro-Magnetic Force Restoration (EMFR) for ultra-precise weight measurement
- Reduces product giveaway and ensures consistent portion control
- Supports regulatory compliance with full traceability and audit logging
- Handles up to 225 products per minute with minimal downtime
- Available with air blast, pusher arm, or dual-bin reject systems
- Built for wet, dry, or washdown environments with IP54, IP66, or IP69K options
- Configurable for diverse line layouts in food, pharma, and consumer goods applications

About
Bunting's Performer Series tunnel metal detectors provide advanced contamination detection for various applications, including food processing, pharmaceuticals, and manufacturing. Our reliable systems are designed to offer high-precision identification of ferrous, non-ferrous, and stainless steel contaminants, ensuring product purity and protecting valuable equipment.
These tunnel metal detectors feature customizable designs that can seamlessly integrate into existing production lines. They come equipped with user-friendly control panels for easy operation and advanced detection capabilities that deliver superior sensitivity. Additionally, the waterproof, epoxy-filled search heads enhance durability, while efficient rejection systems minimize product loss.
Key Benefits of Implementing Bunting Tunnel Metal Detectors Include:
- Protecting product integrity and brand reputation
- Safeguarding downstream equipment from damage
- Ensuring compliance with industry standards and regulations
- Improving overall production efficiency
- Minimizing costly downtime and repairs
Our systems can identify ferrous metal particles as small as 1.75-2.0mm, non-ferrous metals at 2.0-2.5mm, and stainless steel at 2.5-3.0mm, making them ideal for industries requiring the highest level of detection.
Enhance your quality control process with Bunting's reliable and efficient tunnel metal detectors. Contact us today for a customized solution tailored to your specific needs!

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