The most multipurpose type is the Free Fall Metal Detector, where the material is gravity fed through the inlet of the detector. Metallic particles are detected and immediately rejected by an air-operated rejection system. Adjustable sensitivity coupled with short rejection time ensures minimal loss of good product.
Free-fall units can be purchased in single-coil or balanced-coil designs with either analog or digital electronics. Free-fall units can vary in aperture size from 25 to 300 mm (1 to 12 in.). Some types use a quick-clean rejection system that facilitates cleaning from the reject system.
Metal detectors for pneumatically conveyed materials take the form of a collar around the conveying line. Again, these detectors can be purchased in single- or balanced-coil design with analog or digital electronics. Positive speed control is accessible on some models to precisely time the reject-gate opening and closing so that you can minimize the losing of good material.
Metal detectors for mechanical conveyors take the type of a tunnel surrounding the conveyor. This technique could be coupled with many different customized rejection alternatives for loose or packaged materials. Metal detectors for films and thin sheets use coils that are extremely sensitive at close range. They can fit directly underneath the web and require hardly any space.
Separators for plug-flow applications are similar in operating principle to a free-fall detector. However, the plug-flow design detects metals in slow-moving or standing columns. A normal application is mounting the unit beneath the hopper and just above the throat in the processing machine. At Bunting Magnetics, we call this the “Last Chance Separator” or LCS. The LCS is built to back up batch feeders, blenders, as well as other processing equipment weighing approximately 250 lb. Equipment is bolted right to the infeed of the LCS.
Put in a magnet – Place a drawer, grate, hump, liquid-trap, or some other magnetic separation unit upstream to work alongside your detector. Magnetic separators will pull all ferrous metal out before it reaches the detector. This can lighten the burden of contaminants that move through the detector, increasing its efficiency while minimizing the probability of rejecting good material. Furthermore, usage of an upstream magnet allows you to adjust the detector’s sensitivity to your higher level to capture only non-ferrous contaminants.
The detection system consists of a pulse/echo transducer, a water jet nozzle as well as an x-y table. Foreign bodies including glass, Walk-Through Metal Detector were detected by scanning the flat bottom in the beverage container. According to acoustic modeling, a way for detection and identification of foreign bodies is developed and tested. A transmission processing algorithm for time-frequency analysis is utilized to discriminate between beverage and contaminants from ultrasound echoes. Effective detection ability for materials such as glass, metals, and plastic, with sizes from 10 to 2.5 mm2 is demonstrated. Experiments were also performed using ultrasonic beam penetrating glass material to detect steel balls of different sizes. This really is closer to the truth of real foreign body in terms of orthogonality and cross-section to ultrasound beam.
Detection of metallic and non-metallic objects – Sometimes you just need to really know what is hidden behind a surface. For example behind a wall or cover, or what exactly is inside in a storage container or shipping container. Capacitive proximity sensors are best for level and feed monitoring. From solid material, including paper or wood, to granules or liquids, they reliably detect the status in the product during the production process and final inspection. Can there be something behind which cover? Will be the filled package really full?
Just how much paint is still left inside the tank? For capacitive proximity sensors, these are easy questions to answer. Capacitive proximity sensors from SICK are never far away from the action. Sensing ranges between 1 and 25 mm permit them to be applied in nearly all installation situations, which makes them extremely adaptable for an array of applications. These sensors pbgavn also remarkably resistant to faults. Impurities, contamination, dust, and airborne spray particles have little influence on them, nor does electromagnetic interference. Not surprising they may be installed in a wide range of industries, like food, automotive, or perhaps in storage and conveyor systems.
Reliable, powerful, rugged. Inductive proximity sensors from SICK – An incredible number of inductive proximity sensors are used in nearly all industries. They Desktop Poisonous Liquid Detector without contact, and they are characterized by a lengthy service life and extreme ruggedness. Using the latest ASIC technology, SICK’s sensors offer the epitome of precision and reliability. SICK can provide the correct answer to meet your needs every time – from cylindrical or rectangular standard sensors with single, double or triple operating distance, to special sensors for explosive zones and harsh environments. Our sensors would be the intelligent, reliable path to implementing industry-specific and customized answers to any task involving automation.
Junhong Electronic&Technology (Dongguan) Co., Ltd is a professional manufacturer since 2005, specialized in R&D of security detection technology. We have various of products range: Walk through metal detectors, hand held metal detectors, X-ray luggage scanners, X-Ray Body Scanner, Underground Metal Detector, Industrial Metal Detector, Checkweigher, Infrared Body Temperature Detection System; Explosives Detector, Under Vehicle Surveillance Systems; etc.
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