Why can't older contaminant detectors detect "stainless steel"? A deep dive into Multi-Spectrum technology.

In the Food Industry, “Safety” Is the Heart of Product Quality
But why do traditional metal detectors fail to detect stainless steel?

In the food industry, safety is the core of product quality. However, many factories still face a critical issue when using conventional food metal detectors—they are unable to detect stainless steel, one of the most common contaminants in food production.

This article will take you deep into:

• Why traditional metal detectors fail to detect stainless steel
• What Multi-Spectrum Technology is
• Why food factories in 2026 should not overlook this technology
  → If you are looking for a food metal detection solution that can accurately detect stainless steel, explore our products at Food Metal Detectors for the Food Industry.

Limitations of Traditional Food Metal Detectors
Most conventional food metal detectors operate using a single electromagnetic frequency, which leads to several key limitations:

✅ Excellent detection of ferrous metals
⚠️ Moderate detection of non-ferrous metals
❌ Very poor detection of stainless steel

The main reason is that stainless steel has low magnetic permeability and produces a signal very similar to the product effect of food itself. As a result, the detector cannot clearly distinguish stainless steel from the food product.

This creates a critical blind spot in traditional metal detection systems for the food industry.

What Is Multi-Spectrum Technology?
Multi-Spectrum Technology is an advanced contaminant detection technology that analyzes signals using multiple frequencies simultaneously.

Key Advantages:

• Highly accurate separation between food signals and stainless steel
• Real-time, in-depth signal analysis
• Reduced false rejects and minimized contaminant escape
• Improved stability across the production line
• Suitable for a wide range of food products—wet, dry, or high-salt content

With this technology, contaminant inspection systems can reliably detect very small stainless steel particles with high precision.

Why Is Multi-Spectrum Essential for Food Factories in 2026?
As food safety standards continue to rise—such as GMP, HACCP, BRC, and FSSC 22000—traditional detection technologies are no longer sufficient.

Key Benefits for Food Manufacturers:

• Reduced risk of product recalls
• Increased confidence from consumers and business partners
• Compliance with export requirements and international audits
• Enhanced factory image and quality standards

This is why many food manufacturers are upgrading their food metal detectors to Multi-Spectrum systems.

Siam Paragon Solutions: Experts in Quality Inspection Systems
Siam Paragon Solutions is a comprehensive provider of contaminant inspection systems and food metal detection solutions.

Our Services Include:

• Consultation and system design tailored to each production line
• Sales and installation of Multi-Spectrum food metal detectors
• On-site performance testing
• Professional installation and after-sales service
  

We believe that food safety begins with the right technology and the right understanding.

Traditional contaminant detectors are not “wrong”—they are simply no longer sufficient for the complexity of today’s food industry.

Choosing a Multi-Spectrum contaminant inspection system is the key to accurate stainless steel detection, improved product quality, and elevated factory standards.

Contact Us
If you are looking for experts in food metal detection, Siam Paragon Solutions is ready to provide consultation and on-site testing.

Tel: +66 (0)2-394-9932
Mobile: +66 (0)99-827-0078
Email: marketing@siamparagons.co.th
Website: Siam Paragon Solutions Co., Ltd.
Company Profile: Siam Paragon Solutions Co., Ltd.
Facebook: Siam Paragon Solutions – Food Industry Machinery Center