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Worldwide leading manufacturer of EMC (electromagnetic compatibility), EMI (electromagnetic interference) and RFI(radiofrequency interference) shielding solutions. Keep up to date with the latest developments in Holland Shielding Systems BV by signing up for our newsletter. Shielding is a fast way to comply with legal requirements issued by bodies like CE or FCC or to prevent electro-magnetic interference.
Corrosion protection is very important for applications close to the sea (due to salt) and in outdoor applications. We have designed special resilient gaskets such as Ultra Soft Shield and V-shape gaskets. We can produce our gaskets in any desired quantity, whether it is just one gasket or a thousand, and all gaskets can be made to your specifications.
Aluminium housings:When an aluminium housing has to be EMI-shielded, we recommend 6800 series Amucor shielding gaskets.
Stainless steel housings:When a stainless steel housing has to be EMI-shielded, we recommend 6800 series Amucor shielding gaskets or in some cases 7400 series Ultra soft shield. To obtain a contact surface within the same galvanic range as the conductive covering of the gaskets, a Conductive tape with a conductive self-adhesive on the back can be applied. Another way to avoid galvanic corrosion is by preventing corrosive environmental influences from reaching the EMI-shielding gasket, for example by means of a gasket that combines a water seal with EMI shielding (fig. The stiffness of the gasket depends on the rigidity of the construction and the distance between the fixings.
For conductive metal Faraday cage doors, a 8700 series V-shape gasket or 2000 series Be-Cu fingerstrip is most frequently used.
Where a relatively small and watertight gasket is required, we can deliver 5750 Electrically conductive rubber O-profiles. Not only connections between construction parts, but also displays and vent panels need to be shielded.
The shielding of the displays has to make contact with the shielding of the enclosure to guarantee optimal attenuation.
To prevent radiation emission through power and signal cables, they need to be shielded or filtered. Please note that cables without a shielding jacket also have to be shielded outside the shielded enclosure to keep them from acting like antennas. Shielding PCBs and shielding individual components can also be achieved by soldering vertically placed metal strips (e.g. If the radiation source or the EMI-sensitive component is known, shielding for the specific component(s) can be applied.
Almost any electrical transitions with sharp edges, such as clocks, data, address and control, produce electromagnetic radiation. To get a quotation for High performance EMC cable glands within 24 hours fill in the form below.
Kemtron specialises in the manufacture of bespoke “O” rings specialising in silicones and fluorosilicones. The use of electronical devices is increasing, as is the exposure to a wide range of frequencies. Our shielding solutions are cost-effective, since they do not require time-consuming development before you can comply with EMI demands. At lower frequencies, such as 30 kHz and less, one has to use materials with a good magnetic conductivity (as well as electric conductivity when dealing with eddy currents) and thicker material may be needed. High frequencies ranging between 100 MHz and 40 GHz are very sensitive to small gaps in the enclosure.

To shield the vents (ventilation openings), we recommend 9500 series Honeycomb ventilation panels. If the enclosure is to be painted, the tape can be provided with a masking tape of a slightly smaller width (the paint will cover the conductive tape along its edges, which inproves bonding and corrosion resistance) (Fig. When the gasket is too rigid, the cover or door can become distorted, resulting in small gaps with the result that the enclosure loses its ability to shield from higher frequencies. Displays can be provided with a sputtered transparent conductive coating for HF shielding (>30 MHz, Fig. Shielding can be provided by covering the cables with shielding tubes or by wrapping conductive materials around them.
For heavy-duty and military applications, shielded cable glands and specially designed cable entry systems are available. Such a leak in the EMI shield can be prevented by installing a power or signal line filter or, if you are dealing with shorter cables leading to another shielded enclosure, by using a wrap shield or shielding tube. 9) made of Mu-copper shielding foil with an insulation layer on the inside or with plastic studs to avoid short-circuits (Fig.
The best way of shielding at the source is to shield only the interfering part or the sensitive part on the PCB with our specially developed 1500 series PCB shielding system. The technique may even be applied in forensic science, for example if a device needs to be blocked completely from communicating with the outside world while it is being examined. The cable gland combines excellent HF-damping performance and ease of installation with the other system features to achieve values greatly in excess of the requirements of EN 50262. The design of the spring precludes its getting caught in the braiding even if the assembly is dismantled. This High performance EMC cable gland is practically the same as 4965, however, these can withstand higher temperatures. Made from extruded sections cut to length and the two ends joined by vulcanisation to ensure a durable bond and maintaining the integrity of the seal. Knitted into various sizes and configurations, mesh can be added to most jacket materials to create an easy-to-install Zip-on EMI shielded assembly. Cable shielding can be supplied as a ready-made sleeve, on rolls or as a flexible shielding tube. Radiation and immunity have to be taken into account in early stages of the development of new products.
Shielding is typically used in enclosures in order to isolate the electrical devices inside them from external influences and for cables in order to isolate wires from the environment through which the cable runs. If shielding against frequencies around 50 Hz is required to limit influences from a transformer (which can cause health risks or influence the operating system of machines), then using dense metal layers and a special material called Mu-ferro should be considered (see Magnetic shielding).
The higher the frequency, the more attention should be paid to prevent holes and gaps in the shield. They are a cost-effective solution since no fundamental changes to the enclosure have to be made and there is no need for extra fasteners. To prevent unwanted influences from lower frequencies, cables and enclosures have to be shielded with magnetically conductive materials.
In other words: doors, panels and other parts need to be connected electrically, on all sides (without gaps). Flawless contact between the door (and other apertures) and the rest of the enclosure is crucial in maintaining shielding integrity for higher frequencies. We have developed two different cable entry shields, one consisting of two fringed EMI gaskets at the top and bottom sides of a slot (4910 - Cable entry shield) and the other consisting of a contact plate to be mounted in front of a slot with holes to put cables through (4930 - High-performance cable entry shield). They consist of a 1-mm thick die-cut material, which can be manufactured easily according to customer specifications, with little additional tooling costs (Fig.

These compartments are closed by adding a lid of flexible die-cut shielding foil or by pressing a soft conductive foam sheet against the strips (Figs. Shielding at the PCB level with our 1500 series PCB shielding cans - simply place our shielding can over the sensitive chips.
To help you to find which IP rating you need for the desired result, we have put all IP ratings in a clear table. The transition edge, or in engineering terms, the slew rate, has become faster and faster as it has become more difficult to meet  set up and hold time. Now these high-quality, EU-approved EMC cable glands have fulfilled the demanding requirements for UL certification and can therefore also be used worldwide.
We are at the forefront of providing the necessary components to maintain safety within hazardous area electrical systems ranging from the major plant environments all the way to the interface components of your electrical circuits. Our knitted mesh design creates a highly flexible shield that unlike many tubular braids will not change attenuation performance when articulated. In many cases EMI problems cannot be solved at the PCB level alone and instead, enclosures and cables have to be shielded as well. If a company intends a product to have a quick market introduction but the emissions exceed the prescribed limits, easy-to-apply shieldings are a commonly used solution. Especially for doors, several kinds of gaskets have been developed which combine a very large compression range with low closure force and high conductivity. A shielding tube consists of hollow braided metal wire, through which a cable or bundle of cables can be pulled in order to shield them.
Our range of custom o rings means we can make any o rings to your exact specification for any purpose.
Shieldings can be used for appliances with high radiation or sensitivity levels, or for products where these levels are not known in advance, like modular enclosures. These gaskets can be used in most situations, without a need for changing the construction.
The transparent conductive coating is supplied on foil (easy to bend and stick onto a window), glass (standard window) or other materials (for heavy-duty purposes).
A wrapshield is a knitted-metal wire tape, which is wrapped around a cable or bundle of cables. The plate system has higher performance, but with the fringe system it is easier to ad cables later on. Even in the high frequency range up to 2.5 GHz, the values are typically a minimum of 50 dB.
Shieldings are used when dealing with sensitive measurements that can be affected by ambient fields as well.
The gasket selection diagram below may be helpful in determining the appropriate gasket material. Honeycombs are usually supplied with a rigid aluminium frame and a gasket of 2-5 mm for optimal contact with the construction.
Shielding is evidently a wide-spread phenomenon and necessity in the electronics industry to meet today's emission standards.

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