Conveyor Belt Metal Detector DD-360 | Food Safety | SameGram

In modern food processing and industrial manufacturing production lines, metal contamination is one of the most common and dangerous quality risks. A broken screw, a piece of worn-out screen mesh, or even a dropped injection needle can have catastrophic consequences—for food companies, this means consumer complaints, a collapse of brand reputation, and even legal liability; for pharmaceutical companies, it can directly threaten patients' lives; and for the textile and chemical industries, metal contaminants can damage expensive downstream equipment, causing production stoppages and economic losses.

The DD-360 series is a high-performance conveyor belt metal detector designed by SameGram specifically for end-of-line quality inspection. Its standard inspection weight range is 3 to 14 kg, with a maximum inspection speed of 5 pieces per minute (adjustable according to product spacing). It can handle products with a maximum size of 400mm (length) × 400mm (width) × 250mm (height). The overall dimensions of the device are approximately 1400mm × 907mm × 1195mm, and the conveyor belt height is 800mm (±50mm adjustable), allowing for seamless integration with most standard production lines.

the DD-360 is based on the advanced balanced coil (three-coil) principle. The transmitting coil generates a high-frequency electromagnetic field within the detection aperture, and the two symmetrically arranged receiving coils maintain balance (zero signal) in the absence of metal. When a metallic foreign object passes through this magnetic field, the electromagnetic balance is broken, and the receiving coils induce a signal change.

Unlike other technologies, the DD-360 employs a dual-channel independent signal processing architecture (CHX and CHY channels), enabling simultaneous analysis of both resistive and inductive components of the detection signal. This technological approach offers three significant advantages:

● Higher detection sensitivity: Especially for metals that are difficult for traditional metal detectors to capture, such as non-magnetic stainless steel (SUS304/SUS316), the DD-360 can achieve reliable detection capabilities.

Under no-load testing conditions with the standard DD-360-4010 model (detection aperture 400mm×100mm), the DD-360 can reliably detect the following minimum metal sphere diameters:

● Ferromagnetic metals (Fe): Φ ≥ 0.6mm — the easiest metal type to detect, used as a benchmark.

It should be noted that the above are the sensitivity values for an empty machine. In actual product testing, sensitivity is affected by multiple factors such as product characteristics (moisture content, salinity, temperature, packaging material), the shape and orientation of foreign objects, and the installation environment. Therefore, calibration is required for specific products through an automatic learning program.

The DD-360 features a 7-inch color touchscreen human-machine interface (HMI) for an intuitive user experience. Its intelligent functions include:

For any industrial equipment sold in the international market, CE certification is not only a regulatory requirement, but also an authoritative endorsement of product quality and safety. The DD-360 series has passed comprehensive testing and certification by Shenzhen BKC-Lab Testing Co., Ltd. (Certificate No.: BKC26052579EC, Report Date: June 4, 2026), covering the following core directives and harmonized standards:

Metal detectors are essentially highly sensitive electromagnetic field detection instruments, making their electromagnetic compatibility (EMC) design crucial. The DD-360 has passed comprehensive testing according to EN IEC 61326-1:2021 standard (Electromagnetic compatibility requirements for electrical equipment for measuring, control, and laboratory use). This means:

● The DD-360 will not interfere with the normal operation of other equipment on the production line due to its own electromagnetic radiation.

The DD-360 underwent a rigorous mechanical safety assessment according to the following standards:

● EN ISO 12100:2010 — Safety of machinery — Risk assessment and risk reduction. Comprehensively identify all potential hazards in the design, installation, operation, and maintenance phases of equipment and implement appropriate protective measures.

The DD-360 's electrical safety design complies with EN 61010-1:2010+A1:2019 standards, covering key indicators such as insulation withstand voltage, grounding continuity, and leakage current protection. The equipment requires a grounding impedance of less than 100Ω, uses a soft copper grounding wire with a diameter of not less than 1.6mm, and it is recommended to install a residual current device (RCD/residual current circuit breaker) in humid environments.

Notably, the DD-360 has taken the lead in completing the compliance assessment for the latest EU Machinery Regulation (EU) 2023/1230. This regulation, published in 2023, will gradually replace the current Machinery Directive 2006/42/EC. SameGram's proactive approach to achieving compliance with the new regulation demonstrates its forward-looking emphasis on product safety standards and provides assurance for its customers' future compliant sales in the European market.

RoHS (Restriction of Hazardous Substances, 2011/65/EU and its amendment (EU) 2015/863) is the EU's mandatory standard for restricting the use of hazardous substances in electrical and electronic equipment. The DD-360 series has passed RoHS compliance testing (certificate number: BKC26052581EC), confirming that the content of the following ten restricted substances is below the prescribed limits:

RoHS compliance is significant beyond simply meeting EU regulations. For customers in the food and pharmaceutical industries, RoHS certification means that no hazardous substances were used in the manufacturing process of the DD-360 , and the equipment itself will not be a source of secondary contamination of the products. This certification also reflects SameGram's corporate responsibility in environmental protection and sustainable development.

In the HACCP (Hazard Analysis and Critical Control Points) system, the detection of foreign metal objects is explicitly listed as a Critical Control Point (CCP). The DD-360 series provides complete tool support for HACCP compliance:

● Routine verification testing: Using certified standard test pieces for ferrous, non-ferrous, and stainless steel, the detection sensitivity is verified daily before and after operation to ensure that the equipment is always under control.

For the food and pharmaceutical industries, the hygienic design of equipment directly impacts product quality and compliance audit results. The DD-360 was designed with hygiene requirements fully in mind from the outset.

The DD-360 series offers a variety of detection aperture configurations to accommodate different product sizes and sensitivity requirements. Detection sensitivity is inversely proportional to aperture size—the smaller the aperture, the higher the sensitivity. Therefore, it is recommended to select the smallest aperture model that accommodates your largest product size for optimal detection performance.

For any industrial equipment sold to the EU and the European Economic Area, the CE marking is a mandatory market access requirement. The DD-360 's completed CE certification covers the EMC, MD, and LVD directives, as well as the latest Machinery Regulation (EU) 2023/1230. This means that after purchasing the DD-360, you do not need to spend several months and high costs on separate compliance certifications and can directly deploy it on the production line of export products.

When your clients (especially large international retailers and brands) conduct supplier quality audits, whether the equipment used on the production line has international certifications is a crucial audit item. DD-360 's CE and RoHS certifications can be submitted directly to the auditors as part of the quality management system, significantly simplifying the audit process.

In a global environment of increasingly stringent food safety regulations, companies must prove they have exercised reasonable care in the event of product contamination. Using internationally certified metal detectors and adhering to HACCP standards for routine verification testing and record keeping are crucial components of any legal defense system.

RoHS compliance demonstrates a company's commitment to environmental responsibility. In today's world where ESG (Environmental, Social, and Governance) investment principles are widely accepted, choosing equipment suppliers that meet environmental standards helps enhance your brand image in the eyes of end consumers and investors.

● Temperature: 0°C to 40°C (operating temperature range -10°C to 45°C), avoid direct sunlight and close-range radiation from heating equipment.

The DD-360 requires a warm-up period of at least 30 minutes to allow the electronic components to reach a thermally stable state before testing can begin. For scenarios with significant ambient temperature variations (such as powering on in the early morning during winter), the warm-up time should be extended appropriately, and a sensitivity verification test should be performed after the warm-up period is complete.

● Daily: Before starting work, perform visual inspection, cleanliness inspection, conveyor belt condition inspection, and sensitivity verification (Fe, Non-Fe, SUS standard test pieces). After work, remove the conveyor belt and clean both sides.

No. Metal detectors work on the principle of electromagnetic induction and only respond to conductive metals. For comprehensive detection of non-metallic foreign objects, an X-ray detection system can be considered.

The conductivity (product effect) of frozen products is much lower than that of thawed products. As the product temperature rises, the activity of moisture increases, the product effect intensifies, and the detection sensitivity decreases accordingly. It is recommended to perform automatic learning calibration at the actual product detection temperature and maintain product temperature stability.

The detection of fine, filamentous metal fragments is highly dependent on their orientation as they pass through the detection area. Even if the fragment is long, it may fail to trigger detection if its cross-sectional diameter is extremely small and it passes through in the most unfavorable direction. Precautions are recommended upstream (regularly inspect and replace screens and brushes) and that the product be passed through in multiple directions during validation testing.

Yes. Metal jewelry such as rings, watches, and bracelets can interfere with the electromagnetic field of the detector, potentially causing false alarms or masking the true foreign object signal. All operators must remove metal jewelry before approaching the equipment.

In an era of increasingly stringent industrial automation and food safety regulations, a reliable and fully certified metal detector is no longer just an optional quality control tool, but a strategic investment for a company's survival and development. The SameGram DD-360 series conveyor belt metal foreign object detector, with its advanced dual-channel DSP detection technology, intelligent operating experience, comprehensive CE and RoHS international certifications, and thoughtful HACCP compliance support, builds a robust defense against metal foreign objects for food, pharmaceutical, and industrial manufacturing companies.

We deeply understand that every metal detector represents the reputation of our company and the safety of our consumers. Therefore, SameGram not only provides the equipment, but also offers comprehensive lifecycle services, from selection consultation and installation to operation training and after-sales support.

For more technical details about the DD-360 series, to request a copy of the certification certificate, or to schedule a live demonstration, please contact us through the following methods: