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  • Reliably detects metals in free-falling goods
  • Simple assembly due to mounting frame and quick release rings
  • Highest sensitivity with 4-quadrant technology
  • Autocalibration and TeachAssistant for intuitive control and easy installation
  • Maintenance-free through automatic balance and calibration control
  • ATEX-version for use in explosion endangered environments
  • BRC-Kit option: Conformity with the Global Standard of the British Retail Consortium (BRC) for food safety


  • 4-quadrant technology provides maximum detection performance with the highest reliability 
  • Simple setup with TeachAssistant, pre-set product types like salty, sweet, wet, dry etc.
  • Memory for up to 250 products
  • Easy to use with intuitive and multilingual menus
  • 4-level password system, automatic log out after time lapse
  • Documentation of all events and metal messages
  • IFS and HACCP reports available on the display at the simple push of a button
  • Optional: Data transfer to USB interface or connection to the company network via SHARKNET® software
  • Cyclical function monitoring with Performance Validation System (PVS)


The METAL SHARK® GF (Gravity Feed) is used for pipelines with free-falling products to detect metal contamination in continuously flowing granulates or powders such as sugar, flour, grain or even plastic granules. The sensitive sensors detect the smallest metal contaminants, and fast-switching separation flaps discharge them directly from the product stream during ongoing production.

Delivery Scope

  • Detection unit (sensor) GF incl. mounting frame
  • Control unit METAL SHARK®
  • Rejection unit (also avialable without reject system)
  • POM pipe for detection zone incl. quick clamping rings


  • Monitoring of loose, free-falling or compressed air conveyed products in pipelines
  • Quality assurance for incoming goods, outgoing goods or during running production
  • Machine protection, e.g. for mills or extruders


Electronics Digital signal processor, digital frequency generation, digital balance control, automatic calibration, digital noise filters, integrated flexible control functions
Input 2 analog 0…10 V DC (option: 4-20 mA) 8 freely configurable 24 V DC signals, e.g. for reject confirmation
Output 2 floating: “error” and “metal” 8 freely configurable 24 V DC signals, e.g. for metal or acoustic alarm
Inspection Method High-frequency magnetic field, multi-channel operation, symmetrical receiver coils
Metal Detection Ferrous, non-ferrous (e.g. aluminium or copper) und stainless steel
Product Compensation Memory for up to 250 products, automatic product compensation, with TeachAssistant
Enclosure Rating IP65 (optionally IP66)
Environmental Conditions for Controller -30°C to +40°C / -22°F to 104°F, UL version: -20°C to +40°C / -4°F to 104°F, rel. humidity 20% up to 90% (non-condensing) Option: -40°C / -40°F or +55°C / 131°F
Environmental Conditions for Sensor -30°C to +60°C / -22°F to 140°F Option: up to +90° C / 194°F
Temperature of Goods Inspected Standard: -30°C up to 55°C / -22°F up to 131°F Option: -40°C / -40°F or up to 120°C / 248°F or up to 180°C / 356°F
Power Supply One phase 110-230 V AC, typ. consumption 20 W (max. 60 W)
Interface RS232, provides documentation according to HACCP- and IFS-standard, USB- or ethernet option
Maintenance Maintenance-free, selfcalibrating sensors
Diagnostics Integrated diagnostic software, automatic self-test
Infeed and Reject System available pipe diameter 50 to 300 mm (2" to 12"), reject available for 50 to 250 mm (2" to 10"), reject types EX-P (for powder), EX-S (for grain, nuts), EX-K (abrasive products, robust), EX-CB (grain, nuts, does not damage product)
Stand Optional: Stainless steel support stand
Flow rate 100 mm pipe has 20000 l/h (700 cu ft/hr), 300 mm pipe has 165000 l/h (5800 cu ft/hr), for easy flowing product such as dry sugar
Best Metal Sensitivity 100 mm pipe has Fe 0.5/Nfe 0.7/SS 0.8 mm, 300 mm pipe has Fe 1.9/Nfe 2.4/SS 3.0 mm only approximate values, depending on with/without ejector, working frequency, etc.
Product Guidance and Reject System FDA-compliant design made of stainless steel and PVDF for all parts in contact with the product, except pipe diameter 300 mm (12") is without FDA-compliant design

Accessories & Extras

The METAL SHARK® GF can be perfectly adapted to your production process by various special designs and accessories. Different temperature or hygiene requirements are taken into account as well as complicated product requirements for metal detection or the environment (ATEX).