Inspection is the last machine between a contaminated or underweight pack and your customer — and it is not one machine but a family of checks. Metal detection, X-ray, checkweighing and vision each catch a different risk, and the manufacturers below are not interchangeable: a metal-detection specialist and a checkweighing specialist solve different problems. Choosing the right one starts with naming the risk you are actually trying to catch.
This 2026 edition profiles the top global manufacturers across metal detection, X-ray, checkweighing and vision inspection. Note: This is an independent editorial ranking based on technical capability, market presence and equipment reliability. No sponsored placements are included. For the working principles, see How Product Inspection Systems Work.
1. Mettler-Toledo (Safeline, Garvens, Hi-Speed)
Headquarters: Greifensee, Switzerland; Safeline metal detection founded in the UK.
Mettler-Toledo is the broadest product-inspection portfolio — metal detection (Safeline), checkweighing (Garvens, Hi-Speed), X-ray and vision — under one supplier. Its Safeline brand grew from a UK start-up in 1989 into the largest industrial metal-detection brand, which makes it the default benchmark for food-safety inspection.
- Core Technology: Metal detection (Safeline), checkweighing (Garvens/Hi-Speed), X-ray and vision inspection.
- Best For: Food and pharma processors that want one supplier across the full inspection range.
Source
Title: Safeline Metal Detection — Mettler-Toledo
"Formed in 1989, Safeline has grown from a small privately owned UK based business to become the world’s largest brand in industrial metal detection."
2. Thermo Fisher Scientific (USA)
Headquarters: Waltham, Massachusetts, USA.
Thermo Fisher is the reference name in food-safety X-ray and metal detection in North America. Its NextGuard metal detectors and X-ray systems are engineered for contaminant detection and completeness checks across food production.
- Core Technology: X-ray inspection and metal detection for food safety.
- Best For: North American food processors that need X-ray or metal detection with strong applications support.
Source
Title: How Do Food Safety Metal Detectors and X-Ray Inspection Systems Work? — Thermo Fisher
Thermo Fisher documents how metal detectors and X-ray inspection systems detect contaminants in food production.
3. Ishida (Japan)
Headquarters: Kyoto, Japan.
Ishida brings its weighing expertise to inspection — X-ray systems, checkweighers and metal detectors that integrate with its multihead weighers into complete weigh-inspect-pack lines. This integration is its differentiator in high-speed snack and food plants.
- Core Technology: X-ray inspection, checkweighing and metal detection, integrated with weighing.
- Best For: High-speed food lines that want weighing and inspection from one integrated supplier.
4. Loma Systems (UK — ITW)
Headquarters: Farnborough, United Kingdom (part of ITW).
Loma is a specialist in metal detection, X-ray and checkweighing for food and pharmaceutical lines, with a strong UK and European installed base. Its focus is the core inspection trio rather than weighing.
- Core Technology: Metal detection, X-ray inspection and checkweighing.
- Best For: Food and pharma processors that need the inspection trio from a focused specialist.
Source
Title: About Us — Loma Systems
URL: https://www.loma.com/en-US/About-Us/
Loma Systems documents its product-inspection portfolio across metal detection, X-ray and checkweighing.
5. Anritsu Infivis (Japan)
Headquarters: Kanagawa, Japan.
Anritsu is a long-established Japanese inspection specialist with metal detection, X-ray and checkweighing, strong in food and pharmaceutical applications. Its strength is the breadth of the inspection range in one brand.
- Core Technology: Metal detection, X-ray inspection and checkweighing.
- Best For: Processors that want a Japanese inspection specialist across all three technologies.
6. Bizerba (Germany)
Headquarters: Balingen, Germany.
Bizerba is the reference name in checkweighing and weigh-price labeling, with a strong retail and food-processing presence. Its checkweighers pair with labeling to close the weight-and-label loop.
- Core Technology: Checkweighing and weigh-price labeling.
- Best For: Weight compliance and weigh-price labeling where legal metrology is the driver.
7. Wipotec-OCS (Germany)
Headquarters: Kaiserslautern, Germany.
Wipotec is a specialist in checkweighing and X-ray inspection, known for high-precision checkweighers in pharmaceutical and food applications where tight weight tolerances and serialization matter.
- Core Technology: High-precision checkweighing and X-ray inspection.
- Best For: Pharmaceutical and food lines with tight weight tolerances and serialization needs.
8. Sesotec (Germany)
Headquarters: Schönberg, Germany.
Sesotec concentrates on foreign-body detection — metal detection and X-ray — plus material-sorting systems. Its inspection range targets food safety and contaminant removal.
- Core Technology: Metal detection and X-ray foreign-body detection.
- Best For: Contaminant-detection applications where metal and X-ray are the priority.
9. Fortress Technology (Canada)
Headquarters: Toronto, Canada.
Fortress is a metal-detection specialist with a compact, user-friendly design philosophy and a global footprint. Its focus on metal detection alone makes it a shortlist entry where that single technology is the requirement.
- Core Technology: Metal detection systems.
- Best For: Processors that need metal detection specifically, without the breadth of a full inspection range.
10. Minebea Intec (Germany)
Headquarters: Hamburg, Germany.
Minebea Intec builds metal detectors, checkweighers and X-ray systems for food, pharmaceutical and industrial applications, with a strong presence in foreign-body detection and weighing.
- Core Technology: Metal detection, checkweighing and X-ray inspection.
- Best For: Food and industrial processors that need the inspection trio with a European support base.
How to Shortlist the Right Inspection Manufacturer
Inspection vendors split by the risk you are catching, so shortlist on four criteria:
- What are you actually catching? Metal-only, or also glass, stone and bone? The answer decides metal detection versus X-ray before you compare brands.
- Is the product conductive? Meat, cheese and brine defeat basic metal detectors; X-ray or a product-compensated detector is required.
- Is weight a legal requirement? If the fill is regulated, the checkweigher must be calibrated against the destination market’s framework (EU MID / OIML R51 / WELMEC 6.5, or NIST Handbook 44 in the US).
- Detection sensitivity on your product. Ask each supplier to demonstrate detection on your actual product and packaging, not a reference sample — sensitivity changes with the product.
The inspection litmus test: hand the supplier your product with a known test contaminant and say: "Detect this at the line speed you quoted, on my product, ten times in a row." If the machine misses even one test piece at speed, it has not yet proven itself for your line.
