In-line metal detector for plastics processing
Prevent costly breakdowns in plastics production with an in-line metal detector designed to efficiently remove contaminants from polymer melts, ensuring smooth operations and product integrity.

Detects and Removes Metal Contaminants
The PROTECTOR Series from Sesotec is designed to enhance the reliability of your plastics, rubber, and chemical processing lines by effectively detecting and removing metal contaminants. Installed directly before injection moulding machines, extruders, and blow moulding machines, it inspects slow-moving material columns, enabling the removal of both ferrous and non-ferrous metals. With two-channel detection coil technology, PROTECTOR provides high sensitivity, ensuring minimal material loss. It operates under continuous and high-speed conditions, making it ideal for applications in plastics recycling, electrical waste processing, and more. Featuring auto-learn functionality and the “Quick-Valve” separation unit, it offers easy operation and maintenance. This system is CSA and UL certified for North American markets, and its compact design allows for seamless integration with other machinery, ensuring minimal operational disruption and minimal downtime. Available materials withstand up to 140°C, providing durability in harsh environments, while optional magnet separators offer enhanced ferrous removal.
Benefits
- Enhances equipment protection, preventing costly repairs and downtime.
- Increases product quality by thoroughly eliminating metal contaminants.
- Streamlines operations with easy integration into existing production lines.
- Minimizes material waste with precise separation technology.
- Simplifies maintenance with an auto-learn and compact design.
- Applications
- Chemicals,Plastic compounds,Plastics processing,Glass,Household waste,Plastics,Petrochemical industry,Rubber and tyres,Electrical waste,Recycling
- End products
- Resin compounds,Pet bottles,Polypropylene sheets,Thermoplastic elastomers,Glass cullet,Fiberglass products,Recycled plastic filament,Synthetic rubber tires,Electrical insulation materials,Household plastic packaging,Hdpe containers,Plastic pellets,Rubber seals
- Steps before
- Purification,Drying,Regrind preparation,Material loading,Plastic pellet feeding
- Steps after
- Injection moulding,Extrusion,Blow moulding,Quality inspection,Packing
- Input ingredients
- polymer melt,regranulate,regrind,bulk good temperatures up to 140°C,coarse-grained material,plastic processing materials,virgin glass-filled material
- Output ingredients
- contaminant-free polymer melt,cleaned plastic processing materials,metal-free granulate
- Market info
- Sesotec is known for specializing in the development and manufacturing of innovative machine technology, particularly for metal detection, sorting, and separation systems used across industries such as food, plastics, and recycling, ensuring product quality and safety.
- Accuracy
- Highest sensitivity to all metals
- Automation
- Auto-learn function
- Capacity
- High levels of material throughput
- Installation Position
- Directly before injection-moulding machines,extruders,and blow-moulding machines
- Size
- Compact,space-saving design
- Temperature Range
- Bulk good temperatures up to 140°C
- Resistance
- Highest resistance to interference from vibrations and electrosmog
- Operating Features
- Preset operating parameters,easy operation
- Material Compatibility
- Inspecting slow-moving or standing material columns
- Certification
- UL and CSA certification
- Separation Unit
- "Quick-Valve" separation unit
- Use with External Machinery
- Adapter plates for compatibility with machines from other manufacturers
- Self-monitoring Features
- Visual and acoustic signalling units
- Energy Monitoring
- Compressed-air monitoring system
- Detection Accuracy
- Highest sensitivity to all metals
- Automation Level
- Auto-learn function
- Interference Resistance
- High resistance to vibrations and electrosmog
- Changeover Time
- Quick assembly and integration
- Material Loss
- Minimal loss of material
- Cleaning Method
- Easy cleaning and maintenance
- Installation
- Easy installation
- Visual,Acoustic Signaling
- Implemented for system monitoring
- Self-Monitoring Features
- Compressed-air monitoring system
- Density/particle size
- 0.5–2.5 g/cm³ / 50–1000 µm
- Compact,space-saving design
- Yes
- Machine footprint
- Compact
- Control panel type
- Digital interface
- Discharge method
- Quick-Valve separation unit
- Separation system
- Venturi nozzle / Quick separating slide
- Special designs
- Up to 140°C bulk temperature capacity
- Compact,space-saving design
- Yes
- Control panel type
- Digital/Touchscreen
- Integration capability
- With various plastic processing machines
- Adaptability
- Adapter plates for different machines
- Separation unit type
- “Quick-Valve” separation unit
- Temperature design capability
- Up to 140°C
- Custom placement buttons
- Available