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 Exposure
to high frequency electromagnetic radiation,
particularly microwave emissions from mobile communications network
antenae and radiofrequency emissions from television and radio broadcast
antennae, is a cause of increasing public concern. Despite the large
amount of research already conducted in this area, few concrete facts
exist about the impact on human health from exposure to high frequency
electromagnetic radiation, and the debate continues to generate controversy.
We supply instrumentation and measurement services to enable surveys
of the electromagnetic field intensity in your home, building or workplace
to establish the emission levels from nearby sources, check compliance
with permissible limits, and provide guidance for action if recommended
thresholds are exceeded. In many cases,
exposure to electromagnetic fields and antennae emissions can be substantially
reduced by the use of specially designed architectural shielding materials.
We supply a range of materials for interior and exterior use, from
hard-wearing paints and meshes for exterior applications, to paints,
wallpapers and fabrics designed for interior use, as well as special
shielding for sensitive scientific and electrical equipment.
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High
frequency measurement instruments
We supply a range of instruments for the detection
and measurement of the microwave and radiofrequency radiation
generated by cellphone network antennae and other telecommunications
infrastructure. The devices combine ease-of-use with professional
measurement standard, with advanced features including the ability
to express radiation intensity as a percentage of current ICNIRP
(International Commission on Non-Ionizing Radiation Protection)
recommendations which form the basis of national legislation
in many countries, as well as standard units (W/m2,
V/m, dBm etc.). Other features include frequency analysis, spectrum
display on a large LCD screen, and audio demodulation. Delivery
kits include an aluminium carrying case, directional antenna,
charger, tripod and manual. Options include internal datalogger
with expandable memory.
 The
following instruments are available (see more
technical information here)
HF2025E (frequency range 700MHz - 2.5 GHz)
HF4060 (frequency range 10 MHz - 6 GHz)
HF6060 (frequency range 1MHz - 6 GHz)
HF6080 (frequency range 1MHz - 7 GHz)
For more information and orders, please contact
us or send an email to info@radrisk.com
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Shielding
materials
Architectural shielding materials are used
to reduce the exposure of a building's occupants to electromagnetic
radiation emitted by nearby telecommunications antennae or similar
sources of electromagnetic radiation. Shielding materials are
used increasingly in the construction of new buildings, but
in the vast majority of cases, people wishing to exercise caution
and reduce their exposure to electromagnetic radiation must
install shielding in exisiting buildings to protect their living
or working space. For building exteriors, this may involve using
a specially designed conductive paint on the exterior façade,
or embedding a mesh of suitable conductive material within exterior
construction materials (plaster, tiling etc); for interiors,
conductive paint (subsequently covered with a standard decorative
paint) is generally used. Alternatively, paper-like shielding
materiel can be hung on walls and ceilings exactly like decorative
paper. Windows are shielded using light, washable semitransparent
curtain fabrics, also used to protect sleeping areas with an
anti-electromagnetic "mosquito net". For more permanent
shielding, conductive adhesive film can applied to the windows,
or specially manufactured conductive glass can be installed.
Many new materials are appearing on the market to supply increasing
demand from the public for effective shielding solutions - for
more information, advice and accessories on the shielding solutions
most suitable for your situation, please feel free to contact
us. We supply a wide range of shielding products for all applications,
including the following popular materials:
Electromagnetic shielding paint
 A
popular and effective solution for both interior and exterior
shielding is to apply specially designed electromagnetic shielding
paint to the walls. The paint is available in several formulations,
the most widely used being YSHIELD HSF54, composed of carbon
particles suspended in a high-quality acrylic binder - the paint
contains no metallic components and thus is highly resistant
to corrosion. The paint is applied with a roller (can also be
sprayed) just like a standard decorative emulsion wallpaint.
The HFS54 layer, which is black in colour, can subsequently
be painted over with a layer or two of decorative wall paint.
The paint is water-resistant, and exhibits high adhesion on
many standard construction and decration materials, such as
cement, plaster, plaster board, masonry, emusion wall paint,
etc. The paints do not contain toxic solvents, plasticizers,
or any other toxic ingredients. At GSM900 cellphone network
frequencies, the paint has a shielding efficiency of 39 dB (reduction
in radiation intensity of 99.99%). HSF54 is available in pots
of 5 litre and 1 litre quantities. Standard coverage is 7.5
square metres per litre (interiors) and 5 square metres per
litre. Our prices are the following (please note that customers
from the European Union may be liable to pay 16% sales tax on
these prices); please inquire for shipping costs.
- 1 litre pot HSF54 shielding paint: 77,00
Euros
- 5 litre pot HSF54 shielding paint: 344,00
Euros
For more information and orders, please contact
us or send an email to info@radrisk.com
Shielding fabrics
The simplest and most cost-effective method
to prevent elecromagnetic radaiton entering you building through
the windows, open or shut, is to install net curtains made of
specially produced shielding fabric. We  generally
recommend the use of Swiss-Shield New Daylite, a curtain material
made from polyester filaments woven with micro-fine silver/copper
threads; the metallic threads are coated in a lacquer, thus
the material has no surface conductivity. The New Daylite fabric
has the look and feel of a standard net curtain material, and
is worked in the same way to produce curtains, and also "mosquito
nets" to protect beds against electromagnetic radiation.
The shielding efficiency of the New Daylite fabric at GSM900
mobile telephony frequencies is 32 db (reduction in radiation
intensity of 99,94%). The material is washable (low temperature,
not suitable for tumbledrying) and is supplied by the running
metre in rolls of width 2.6 m. Curtains and bed nets made from
the fabric do not require electrical grounding. Other shielding
fabrics including the Swiss-Shield Naturell and Evolution products
are also available, please contact us for more information.
Our price for the Swiss-Shield New Daylite is the following
(please note that customers from the European Union may be liable
to pay 16% sales tax on these prices); please inquire for shipping
costs.
- Swiss-Shield New Daylite: 50,00 Euros per
running metre (2.6 m roll width)
For more information and orders, please contact
us or send an email to info@radrisk.com
Shielding mesh
 Shielding
can also be incorporated into building materials during consturction
or renovation work. The shielding material A2000+is a stainless-steel
woven mesh with a protective conductive lacquer finish designed
for exterior use. The material is foldable, resistant to rot
and frost, and is installed in walls or concrete structures,
underneath roofing tiles etc. The shielding efficiency of the
A2000+ mesh is 20dB at GSM900 telephone frequencies, or a reduction
of 99%. The material is supplied in rolls of width 1 m lengths
of 10 or 20 metres (thickness 0.5 mm, weight: 200 g/m2).
For more information, pricing, and orders,
please contact us or send an email
to info@radrisk.com
Ground connections
We recomend that wall shielding systems are
connected to an electrical earth for personal safety and to
prevent the generation of low frequency electromagnetic fields
through field coupling with the building's electrical wiring
system. Please note that shielding does not require an electrical
earth to function as a shield against high-frequency electromagnetic
radiation. Earth connections are easily made using a ground
connection kit, consisting of a steel plate which screws into
the shielding wall with a conductive fleece on the rear side
to ensure a good connection to the paint surface. We supply
grounding kits plus full installation instructions (price 35,00
Euros). Each kit is supplied with a 10m long tape containing
a silver-loaded conductive adhesive which is run along the length
of the shielded surface. This is to prevent the possibility
that, in the future, small cracks appearing in the wall surface
due to building settling do not result in sections of the paint
surface becoming disconnected from the earth. The tape is subsequently
covered over by decorative paint used to cover the shielding
paint layer.
Special materials
We supply a range of materials with extremely
high shielding efficiencies, used for example for shielding
sensitive scientific equipment and for securing wireless data
systems from unauthorised access. These materials include:
TCP15 - A flexible non-woven nylon material
with copper and tin conductive  layers
with very high shielding coefficient, used for interior shielding.
Shielding efficiency: 85dB @ 1GHz (99.999999%)
Roll width: 1 m
Thickness: 0.25 mm
Weight: 61 g/m2
Colour: metallic grey
ALFS204 - Aluminium foil backed with a protective
polyester layer to support and  protect
the foil against damage during installation and use. A conductive
aluminium tape is used to connect adjacent strips to ensure
electrical conductivity across the shielding surface
Shielding efficiency: 90dB @ 1GHz (>99.999999%)
Roll width: 1.32 m
Thickness: 0.58 mm
Weight: 204 g/m2
Colour: silver metallic
For more information, pricing and orders,
please contact us or send an email
to info@radrisk.com
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