Metal Detector Machine

Metal-Detector

Industrial Metal Detector

A metal detector machine is a critical quality control solution used in the packaging industry to detect and remove metal contamination before products are distributed. During production or packaging, small metal fragments such as ferrous, non-ferrous, and stainless steel particles may accidentally enter products. An industrial metal detector machine helps identify these contaminants early, allowing manufacturers to prevent product recalls and maintain food safety compliance standards.

This technology is widely used across industries including food processing, pharmaceuticals, packaging, and manufacturing, where strict safety requirements are essential. By ensuring accurate contaminant detection and consistent inspection performance, a metal detector machine helps businesses protect product integrity, consumer safety, and overall brand reliability.

With over a decade of experience supplying inspection solutions to food, beverage, and pharmaceutical manufacturers across Malaysia, Welpack provides industrial metal detector machines that integrate directly into existing packaging and production lines. Our systems are HACCP and GMP compliant, built with stainless steel construction for hygienic environments, and backed by local after-sales support from our Puchong, Selangor facility.

Technical Specifications

  • Specification Description
    Machine Type Conveyor Metal Detector
    Detection Type Ferrous, Non-ferrous, and Stainless Steel
    Detection Sensitivity Fe: ≥ 0.8 mm / Non-Fe: ≥ 1.0 mm / SUS: ≥ 1.5 mm (product dependent)
    Conveyor Belt Width 200 – 600 mm (customizable)
    Conveyor Speed 20 – 40 m/min (adjustable)
    Product Height Clearance 50 – 300 mm
    Reject System Air blast / Pusher / Flap / Drop-down
    Control System Digital control with HMI touchscreen
    Product Memory Up to 100 product settings
    Construction Material Stainless Steel SS304 / SS316
    Protection Rating IP54 / IP65 (optional)
    Power Supply 220V / 50Hz / Single Phase
    Power Consumption Approx. 0.5 – 1.0 kW
    Operating Temperature 0 – 40°C
    Compliance HACCP, GMP, CE
    Integration Suitable for inline packaging and conveyor systems

How a Metal Detector Machine Works

A metal detector machine uses a balanced 3-coil system to detect metal contaminants during production. Metal particles like ferrous, non-ferrous, or stainless steel disturb the detection field, allowing the machine to quickly identify and remove contaminated products from the production line.

Transmitter Coil

Generates an electromagnetic field that forms the detection zone for products passing through the machine.

Receiver Coils

Monitor the field and detect disturbances caused by ferrous, non-ferrous, or stainless steel contaminants.

Detection & Rejection

When metal is detected, the machine triggers the rejection system to remove the contaminated product from the production line.

Industry Applications

Food Production

Detects metal contaminants in packaged and unpackaged food products to ensure product safety and compliance with food safety standards

Beverage Lines

Inspects bottles, cans, and cartons to prevent metal contamination during high-speed filling and packaging processes

Snack and Confectionery

Ensures candies, biscuits, chips, and confectionery products are free from metal contaminants before final packaging.

Pharmaceutical Products

Provides reliable metal detection for tablets, capsules, and medical products to meet strict quality and regulatory requirements.

Non-Food & Industrial Products

Suitable for inspecting non-food items such as plastics, chemicals, and industrial components.

Plastics & Rubber

Detects broken needles or metal fragments in fabrics and garments to ensure safety.

Garment & Textile

Detects broken needles or metal fragments in fabrics and garments to ensure safety.

How to Choose the Right Metal Detector Machine

Selecting the right metal detector depends on several factors specific to your production environment. Consider the following when evaluating options.

Product Type and Condition

Dry, free-flowing products like grains and powders work well with gravity fall detectors, while wet, chilled, or frozen products may require conveyor systems with higher sensitivity settings to compensate for “product effect” (the signal interference caused by moisture or mineral content in the product itself).

Packaging Material

Products packaged in non-metallic materials (plastic, cardboard, paper) are straightforward to inspect. Products in metallised film or foil pouches create stronger background signals and may require advanced multi-frequency detection systems for accurate results.

Production Line Speed

High-speed lines (above 30 m/min) need metal detectors with fast signal processing to keep up without creating bottlenecks. Ensure the detector’s rated conveyor speed matches your line speed.

Need more info? Check out our most frequently asked questions.

What products can metal detector machine inspect?

Metal detector machines can inspect a wide range of products including packaged food, beverages, snacks, baked goods, pharmaceuticals, cosmetics, and small industrial components. Both packaged and unpackaged products can be inspected, depending on the detector configuration.

Can metal detectors detect contaminants inside packaged products?

Yes. Modern industrial metal detectors can identify metal contaminants through most non-metallic packaging materials such as plastic bags, cardboard boxes, paper wrappers, and pouches. Products in metallised film may require advanced multi-frequency detection for accurate results.

How sensitive is a metal detector machine?

Sensitivity varies based on the product type, aperture size, and packaging material but with high-quality systems, tiny metal fragments can be detected.

Is it appropriate to high-speed production lines?

Yes. Industrial metal detectors are designed for continuous inline operation at conveyor speeds of 20 to 40 m/min or higher. The detection and rejection process happens automatically without slowing down the production line.

How is the system maintained?

Sensors and belts are regularly cleaned, calibrated and inspected to make sure that their performance is constant.

Is a metal detector machine required for food manufacturing?

Yes. Many retailers, export markets, and certification bodies require metal detection as part of the quality assurance process. Having a metal detector on your production line also protects your brand from costly product recalls.

What types of metals can the machine detect?

It can detect ferrous, non-ferrous, and stainless steel metals in a wide range of products, both packaged and unpackaged.

Reliable Solutions For Your Production

We’re here to help you maintain product quality and safety.

For combination metal detector machine options, visit our Checkweigher And Metal Detector (Combi Unit) solutions page.