Large‑aperture conveyor metal detector for large‑size cartons, bulk bags and heavy packaged goods. Detect ferrous, non‑ferrous & stainless steel contaminants. Custom tunnel size, alarm & auto‑reject available. Request your quote today!
Large Channel Conveyor Belt Metal Detector Machine – Wide Tunnel For Big Packages & Bulk Goods
Industrial wide‑tunnel metal inspection system, specially engineered for over‑sized cartons, jumbo bags and heavy‑weight packaged products. Comply with HACCP / BRC food safety standards for high‑volume production facilities.
Our large channel conveyor belt metal detector features an enlarged detection tunnel (large aperture), designed to inspect large‑dimension finished goods, bulk‑filled sacks, multi‑pack cartons and heavy‑load products that cannot pass through standard‑size metal detectors.
When metal foreign contaminants (iron, copper, aluminum, broken stainless steel fragments) are mixed inside products, the unit will trigger visual‑audio alarm immediately. It can pair with automatic pusher / flap rejector to automatically kick out non‑qualified items without stopping the whole production line.
Constructed with full SUS304 stainless steel, the machine is water‑resistant, easy to clean. Mobile casters plus height‑adjustable support feet allow quick deployment on different conveyor lines. Perfect upgrade for factories running large‑bag, big‑box production workflows

Application :
Large‑size food cartons & multi‑pack cases
Bulk‑filled jumbo bags (grains, nuts, feed, frozen seafood block)
Heavy‑weight packaged meat, poultry, cheese blocks
Pet‑food big‑bag production line
Non‑food: chemical packing, plastic, rubber raw‑material inspection
Co‑packing factories with mixed large‑size
Extra‑Large Customizable Detection TunnelWide & high tunnel aperture, custom‑built to fit your maximum product width & height. Handles big cartons, bulk sacks and stacked packages that standard metal detectors cannot accommodate.
Advanced DSP Digital Multi‑frequency DetectionSmart product‑effect compensation algorithm. Stable performance even for wet, salty, high‑moisture bulk goods, reduces false alarms. Stores multiple product recipes for fast switching between different product runs.
Food‑Grade SUS304 Full Stainless‑steel BuildCorrosion‑resistant frame and conveyor frame. IP54 standard protection; optional IP65 waterproof version for high‑humidity wash‑down workshop environment.
Complete Alarm & Reject IntegrationRed beacon flashing light + loud buzzer alarm on metal detection. Ready‑made signal output to connect auto‑reject devices, factory PLC systems and production‑line monitoring software.
Intuitive LCD Touch Control PanelUser‑friendly interface, auto‑learn function, built‑in fault self‑diagnosis. Minimal operator training required, lower daily maintenance workload.
Flexible On‑site InstallationEquipped with heavy‑duty moving casters + anti‑vibration adjustable support feet. Easily move the unit between lines; lock the feet for stable continuous operation. Conveyor height & belt speed are customizable to match your existing production line.
Heavy‑duty Conveyor StructureReinforced belt frame to support heavier product weight, suitable for high‑capacity continuous mass‑production environment.
Solves big‑package inspection pain point
Purpose‑built for oversized cartons & bulk bags, no need to split your large‑size goods for metal checking.
Manufacturer direct supply with full customization
We design tunnel opening, conveyor length, load‑bearing capacity, reject system strictly according to your on‑site production condition. No off‑the‑shelf one‑size‑fits‑all limitation.
Complete export‑oriented service
English user manual, remote technical support, spare‑parts supply. We provide CE, packing list, commercial invoice and all export‑required documents.
Continuous heavy‑run reliability
Reinforced mechanical structure, designed for long‑hour non‑stop operation in busy industrial workshops.
Q1: What size of large packages can this large‑channel metal detector handle?A: We fully customize tunnel width and height. It can inspect cartons, sacks up to 1200 mm width and 600 mm height. Tell us your maximum product dimension for exact proposal.
Q2: Will large tunnel reduce detection sensitivity?A: Yes, larger aperture will bring down sensitivity compared with small‑channel models. Our engineers will balance tunnel size and detectable metal particle size based on your product and safety requirements.
Q3: Can it be fitted to my existing production conveyor line?A: Yes. We customize conveyor height, belt speed and electrical signal interface for seamless connection to your present line. Auto‑reject mechanism is available for fully‑automatic workflow.
Q4: What information do I need to provide to get an accurate quotation?
Max size (width & height) of your inspected product / bag / carton
Max weight per product unit
Target metal detection sensitivity requirement
Whether you need automatic rejector
Workshop environment: dry or wash‑down / humid
Destination country for shipping
Send us your product specifications and production‑line requirements. Our engineering sales team will reply with full technical proposal and competitive quotation within 24 working hours.
Custom large tunnel dimension
Free technical consulting
Complete export document support
After‑sales remote guidance
Contact: Kathy JI
Phone: +8618122910774
Tel: +8618122910774
Email: 95308765@qq.com
Add: Business Center Rural Commercial Bank Building, Hongfu East Road, Dongcheng, Dongguan city, China
We chat
