Achieve the highest level of food safety and quality

The Thermo Scientific™ Sentinel™ Multiscan Metal Detector utilizes an innovative new technology to overcome the limitation of fixed single or dual frequency metal detectors that can miss metal contaminants hidden in product signals.

Multiscan technology scans a combination of up to five user selectable frequencies from 50 to 1000 kHz. This enables users to identify contaminants that are up to 70 percent smaller in volume than previous technologies, including the Thermo Scientific™ APEX 500 metal detector, thus reducing the probability of an escape to near zero. It is like having five metal detectors in one.
Unit of Measure



N/A Sentinel™ Thermo Scientific™

Application and Metal Detection Specifications


N/A 50 to 60 Hz50 to 1000 KHz (Multiscan runs up to five frequencies)


N/A Detects contaminants up to 70% smaller in volume than APEX 500 (subject to application testing)

Foot Pattern and Aperture Placement

N/A Same As Apex 500 Metal Detector for Easy Upgrade
Aperture Width1 N/A 75 to 2000 mm
Aperture Height2 N/A 75 to 600 mm

Note for Aperture Size

N/A Not all combinations are possible, contact Thermo Fisher for details.


N/A Stainless steel 304 straight-line finished case and front panel, HD option utilizes 316 stainless steel. Optional three aperture liner styles for harsh washdown and high temperature applications.

Metal Free Zone

N/A 1.5-2X Smallest Aperture Dimension, Can be Reduced with Optional Flanges
Diagonal Human Machine Interface (HMI)3 N/A 7 in178 mm
Product Speed4 N/A 0.5 to 80 m/min1.7 to 262 ft/min

Number of Output Relays

N/A 8

Alternating Current (AC) Output Relay Voltage

N/A 250 V

Maximum Output Relay Alternating Current (AC)

N/A 2 A

Direct Current (DC) Output Relay Voltage

N/A 50 V

Maximum Output Relay Direct Current (DC)

N/A 1 A

Output Types

N/A 8 digital sourcing (PNP) outputs, 24 VDC with capacity of any two at 500 mA, the rest at 30 mA average each

Output Allocation (Software Selectable)

N/A Alarm Fault Reject 1 Reject 2 Warning

Number of Inputs

N/A 8
Active Direct Current (DC) Input Voltage5 N/A 24 V

Input Allocation (Software Selectable)

N/A External Alarm External Reset Infeed Photo Eye (PE) Reject Confirmation 1 and Bin Full Speed Sensor

Help-Text Languages

N/A English

Environment, Electrical and Operational Specifications

Metal Detector Ambient Temperature

N/A -10 to +40 ºC+14 to +104 ºF

Product Temperature in Aperture

N/A -10 to 55 ºC14 to 131 ºF

Maximum High Density (HD) Option Product Temperature in Aperture

N/A 40 ºC104 ºF

Maximum Polyvinylidene Fluoride (PVDF) Option Product Temperature in Aperture

N/A 120 ºC248 ºF

Maximum Washdown Temperature

N/A 55 ºC131 ºF

High Density (HD) Option Product Temperature in Aperture

N/A 65 ºC

Note for Maximum Washdown Temperature

N/A PVDF liner option cannot be washed down (dry applications only)
Non-Condensing Relative Humidity6 N/A 20 to 80 %
Alternating Current (AC) Voltage7 N/A 100 to 240 V
Number of Phase8 N/A 1


N/A 0.6 to 1.2 A

Watertight Universal Serial Port (USB)

N/A 2.0

Conformance Tests and Certifications

Protection Ratings9 N/A Ingress Protection (IP69K)

Export and Safety

N/A cCSAus European Conformity (CE)

Manufacturing Quality

N/A International Organization for Standardization (ISO 9001) Certified

Features and Benefits

Features and Benefits

  • Multiscan frequency flexibility to optimize performance in any application
  • Easy-to-use touchscreen with set-up wizards to reduce set-up time
  • Detailed graphical displays for phase, rejects, quality test, and detection thresholds to enable easy fine tuning and troubleshooting
  • IP69K for severe washdown and dust, eliminating repair costs
  • All electronics are integral, so mounting is easy and flexible
  • All balance functions are implemented in software, so no need for manual hardware rebalance in the field
  • Wide ambient temperature range assuring reliability
  • Fe, non-Fe and 316 SS test pieces included to fit specific application

Available Options

Available Options

  • Welded field compression flanges to reduce metal-free zone in limited space applications
  • HD construction for thermal shock caused by cleaning, includes 316 stainless steel construction
  • High temperature PVDF liners for hot products
  • Heavy-duty flip up polycarbonate control panel cover for extra protection
  • LED alarm/fault lights and horn
  • Remote control panel mounting with optional tilt feature
  • Thermo Fisher designed and built conveyors in North America, Europe and China
  • Mounting and conversion kits for other metal detectors

Additional Information

Additional Information

N/A Complete flexibility for the highest level of food safety
All metals whether iron, stainless steel, brass or aluminum react differently to an electromagnetic field. Their reaction changes based on shape, size, orientation and position. The small signal from the metal contaminant can hide inside of a much larger signal from a wet, salty or high mineral content product. Add to this unwanted electrical interference and vibration effects and you have the potential for metal foreign objects to go undetected.

The Sentinel™ detector offers an entirely new approach to this challenging problem. You no longer must pick the "best" frequency for an application or try running some combination of fixed dual frequencies. Instead, you select 1, 2, 3, 4, or 5 frequencies, use a step-by step wizard to set up your product and test any/all the types of contaminants of concern to see which frequencies work best. The Sentinel™ detector immediately shows what is happening at each frequency such as signal levels, detections and changes in phase angle. No guesswork is needed. If one frequency seems to be doing all the work, simply adjust it to see if you can do better. If there is noise on a frequency or it doesn’t provide protection in your application, disable it. It is that easy, fast and flexible. Do anything with any product at any time.

Sentinel™ shows exactly what a product and various contaminants are doing, taking the guesswork out of optimizing your application.
  • 1 Increments of 25 mm up to 200 mm and 50 mm above 200 mm.
  • 2 Increments of 25 mm up to 200 mm and 50 mm above 200 mm.
  • 3 High-Intensity Color Touchscreen.
  • 4 Encoder Input Highly Recommended.
  • 5 Switch Selectable as NPN or PNP.
  • 6 One Way Breather Valve Standard.
  • 7 Plus Earth Ground.
  • 8 Plus Earth Ground.
  • 9 HD option includes thermal shock protection.