High-Quality Metal Detector Machine for Food Industry from China Suppliers and Factory - Beiheng Conveyor Belt Solutions

Characteristics: the detector channel is square, generally equipped with a conveyor belt mechanism, with automatic rejection device or provide alarm signals.

Application: mainly used for finished and semi-finished products online detection, to provide the final inspection before shipment, such as bagged materials, boxed products.

Classification: Split channel metal detector (easy to install, especially for large equipment) and integrated channel metal detector.

Characteristics: usually equipped with automatic rejection device, mainly used for tablets, capsules, granular (such as plastic particles), powdered goods detection.

Application: When these items fall through the falling metal detector, once detected metal impurities, the system immediately start the separation mechanism to exclude suspicious items.

Advantage: Easy installation, high sensitivity, easy maintenance, high efficiency, stability and reliability.

Features: capable of real-time online removal of metal impurities, to ensure that the product is safely transported to the next process.

Application: Mainly used for the detection of liquid products, such as ham sausage meat sauce, chewing gum, oral fluid, sauces, and so on.

Features: mainly used for detecting smaller products, suitable for production lines.

Features: Portable, easy to operate.

Application: Early in the docks, airports, workshops and other places for public safety inspections, and now mainly used in examination centers to prevent candidates from cheating.

Application: Mainly used in chemical industry to detect products with high environmental requirements.

Application: mainly used in food, spice and other industries to detect liquid or viscous products.

Features: Early in the military for the detection of minesweeper, now mainly used for the detection of metal materials.

Features: can detect all metals such as iron, stainless steel, copper, aluminum, etc., detection accuracy and sensitivity are relatively high, stable and reliable.

Features: can only detect ferrous metal, commonly known as needle detection machine, detection accuracy and sensitivity is lower, easy to interfere.

Features: also can only detect ferrous metal, but in the detection of products with aluminum foil packaging, its detection accuracy and sensitivity is still high.

Opening size: The opening size (window size) of the metal detector will affect its sensitivity. Generally speaking, the smaller the aperture size, the higher the detection accuracy, because a smaller window can reduce the interference from the environment and improve the detection accuracy. However, a window that is too small may result in missed detections because some metal contaminants may be at the edge of the detection area and go undetected.

Frequency: The operating frequency of a metal detector also affects its sensitivity. Generally, the higher the frequency, the higher the sensitivity. However, it should be noted that too high a frequency may increase the risk of false rejection rate.

Metal shape and size: The shape and size of the metal contaminant directly affects the ease with which it can be detected. In general, the larger the metal, the easier it is to detect; the smaller the metal, the less likely it is to be detected. In addition, non-spherical metal particles (such as metal shavings or wire) are more easily detected if they pass through a metal detector in one direction rather than another, which is called the "directional effect.

Type of Metal: Metals are generally classified as ferrous, nonferrous or stainless steel. The ease with which different metals can be detected depends on the permeability of the metal contaminant (i.e., how easily it can be magnetized) as well as its electrical conductivity. In dry product applications, all metallic contaminants are relatively easy to detect, while in wet product applications they are relatively difficult to detect.

Metal Location: The location of a metal contaminant within the detection zone also affects how easily it can be detected. The sensitivity of the metal detector in the opening of different positions will be different, usually the geometric center is the least sensitive parts, and near the wall of the metal detector at the strongest sensitivity.

Product packaging: If the product packaging material itself is electrically conductive (such as aluminum foil packaging), then this packaging material will greatly affect the detection sensitivity. For packaging materials with conductivity, it is recommended to perform metal detection before packaging.

Product characteristics: The water and salt content of the product can also affect the sensitivity of the metal detector. Wet products (e.g. fresh meat, cheese, fish, etc.) or products with a high salt content (e.g. seafood) create a "product effect signal" in the metal detector and are therefore relatively difficult to detect.

Product Speed: The metal detector has certain limitations on the conveyor speed of the product being detected. If the conveyor speed exceeds a reasonable range, the sensitivity of the detector will be reduced.

Environmental temperature, humidity, electromagnetic interference and other factors may affect the performance of the metal detector. In order to achieve the best metal detection results, the aperture of the metal detector should be surrounded by a region known as "free metal zone", this region should be far away from any metal.