Dubalei Metal Detector is an instrument specially designed to detect metal. In addition to detecting mines with metal casings or metal parts, it can also be used to detect wires hidden in walls, water pipes and cables buried in the ground, and even be able to explore underground treasures and find buried metal objects.
Dubalei metal detector can also be used as a tool for youth defense education and popular science activities, and of course it is also an interesting entertainment toy. It is specially used for the detection of iron and non-ferrous metal impurities in foods such as meat, fungi, candy, beverages, grains, fruits and vegetables, dairy products, aquatic products, health care products, additives, condiments, etc.; chemical raw materials, rubber, plastics, textiles, leather , chemical fiber, toys, medicine, health products, biological products, cosmetics, gifts, packaging, paper products and other metal impurities detection.
A typical Dubalei metal detection system consists of the following four main components:
Dubalei detection head
The detector coil, or detector head, has a built-in “balance coil”. Three coils are wound on a non-metallic frame or bobbin. The coils are perfectly parallel to each other. The middle coil (transmitting coil) generates a magnetic field through high-frequency current. The two coils on both sides of the middle coil are receiving coils.
Dubalei Metal Detectors
Since the two coils are identical and at the same distance from the transmitter, their induced emfs are identical. When these coils are connected in reverse, the electromotive forces cancel each other out, resulting in “zero output”, that is, a state of equilibrium.
Then it is poured with cement to ensure that when no product passes through, the magnetic field is in a state of dynamic balance and is not affected by external environments such as temperature changes, vibrations, and electromagnetic interference.
During detection, the product passes through three coils in sequence. If there are metal foreign objects, the balance of the magnetic field will be broken, and an induced current will be generated to detect various metal foreign objects.
User interfaces/control panels typically include touch screen and push button types, and are typically mounted directly on the test head. However, if the sensor head is too small or installed in an inaccessible or difficult-to-reach location, it can be mounted remotely using a connecting cable.
A conveyor system is used to move the product through the opening. The most commonly used conveying device is the horizontal conveyor belt type. At the same time, for different product applications, you can choose the gravity drop type (powder or granule conveyed in the pipeline) or the horizontal pipeline type (liquid and fluid) and the plastic guide trough commonly used in the pharmaceutical industry.
Automatic Rejection System
Automatic reject systems are used to remove any infected product from the production line and are usually installed on conveyor systems. There are many different types, such as blowing type, push rod type, flap type and so on. The type of rejection system depends on the product to be tested.
Our Dubalei metal detectors are beautiful in appearance, light in weight, ABS housing quality: equipped with automatic alarm and automatic return device: strong anti-magnetic interference, high reliability and sensitivity. If you are interested, you can visit our website for details.