Gravity metal detector Sentinel 4000D

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Short description
The Thermo Scientific Sentinel 4000 Drop Through System (Sentinel 4000D) is a high-sensitivity drop-through metal detector designed for granular and powdered products, cosmetics, chemicals and other free-fall applications. Multiscan technology and selectable apertures improve the probability of detecting ferrous, non-ferrous and stainless steel contaminants.

Overview
The Sentinel 4000D features multiscan detection with up to five user-selectable frequencies (50–1000 kHz), an intuitive touchscreen interface with setup wizards, and flexible communications (Modbus serial or Ethernet) for reporting and remote diagnostics. Available HD construction in 316 stainless steel provides enhanced corrosion and temperature-shock resistance for cold or harsh washdown environments.

Key capabilities

• Multiscan technology with up to five user-selectable frequencies to optimize sensitivity per application.
• Touchscreen with guided set-up wizards for fast commissioning and harmonized operation across Sentinel models.
• Modbus serial or Ethernet connectivity for data logging, diagnostics and remote maintenance.
• Certified for hazardous locations: ATEX Zone 22 (EU) and Class II Division 2 (NA); system supported by an independent hazardous location assessment.
• IP ratings: IP69K for head/controller, IP65 for full system.
• HD option with 316 stainless-steel housing for improved corrosion resistance and thermal shock performance.

Benefits

• Improved probability of detecting smaller metal contaminants to enhance product safety and brand protection.
• Field-upgradeable replacement for earlier Apex models to simplify in-field upgrades.
• All electronics integral for flexible mounting and software-based balance functions (no manual hardware rebalance required).
• Field compression flanges reduce the metal-free zone to maximize sensitivity.

Notable application features

• Fe, non-Fe and 316 SS test pieces included to match specific inspection needs.
• Suitable product line speeds: 80 m/min (262 ft/min) to 300 m/min (984 ft/min).
• Optional isolation transformers for power conditioning to protect detector performance from line disturbances.

Technical specifications

• Aperture sizes: Standard: 100, 125, 150, 175, 225 mm; HD model: 125, 150, 175, 225 mm.
• Certifications: Metal detector: cTUVus; CE; ATEX Zone 22; Class II Division 2, Group F & G certified; complete system supported by an independent hazardous location assessment report.
• Communications: Standard Modbus serial or Ethernet modules.
• Construction: 304 stainless-steel case and front panel; HD: 316 stainless steel.
• Electrical: 100–240 VAC, 50/60 Hz, 100 W max, single phase plus earth ground.
• Applications: Metal detection for food, chemicals and other products.
• Inputs: 8 total (reject verify/return, external alarm); active low with auxiliary supply, NPN or PNP.
• Operating temperature: Head ambient: -10° to +40°C; Full system ambient: -5° to +40°C; Product in aperture: -10° to +55°C; HD model: -10° to +40°C. Max washdown temp (head/control): +80°C.
• Outputs: 8 mechanical relays and 8 solid-state/digital relay outputs (250 VAC 2 A max; 50 VDC 1 A max).
• Relative humidity: 20–80% non-condensing.
• Speed: Product flow rate 80–300 m/min (262–984 ft/min).
• UI languages: English, Spanish, German, French, Italian, Chinese, Dutch, Czech, Russian, Polish, Thai, Portuguese, Bulgarian, Finnish.
• Product type: Metal detector.