S200S – RF BLOCKING FABRIC

$200.00

The S200S is a China-made, DOUBLE LAYER KNITTER RF Blocking fabric(cotton, polyester and silver yarn).
One square meter wight 200 g. One side/layer (the Gray side) includes silver yarn. The other side/layer(CcamouflageGray has no steel in it.
The fabric is durable, Stretchable and washable, very flexible and feels nice/soft on the skin.
Blocks, divert, reflect at least 99.76%(26.3dB) of the RF radiation directed at it.
Roll Width: 200cm (used to be 170 cm).
Once cut, there is no money-back guarantee on this product.
Prices are per linear meter and include Shipment.

Out of stock

SKU: S200S Category:

Description

The S200S is a China-made, DOUBLE LAYER KNITTER RF Blocking fabric.  The S200S fabric has the composition of cotton, polyester and silver yarn.
It is a DOUBLE LAYER KNITTED 200 g fabric. One side/layer (the Gray side) includes silver yarn. The other side/layer(Camouflage Gray has no steel in it.

About the S200S RF EMF/EMR Blocking Fabric

RF Blocking effect – Fabric’s RF blocking effect = 30-40dB according to the manufacturers’ data sheet (10MHz-300MHz). But I find the report to be inadequate for presentation, so we tested the fabric myself. 
The fabric was tested by us and showed a good RF Blocking effect (see below).
Our tests showed that the RF blocking effect was at least ~99%/-20dB (using CORNET ED88T in front of a DECT Phone 1.8GHz. In most of the tests we have seen even better outcomes).

The fabric was then tested again and showed good results even after more than 6 laundry cycles in a washing machine in  40-60 degrees cycles, with soap.
Please see the outcomes of the test at the bottom of this page.
The fabric does not block ELF magnetic fields from electric cabinets/equipment and power lines).

The Fabric is delicate and soft, and its ability to block RF is not reduced over laundry cycles.

  • Composition:  50% cotton, 20% polyester, 30% Silver
  • Weight:200 gr/m2
  • Roll Width: 200cm (used to be 170 cm).
  • Weaving pattern: Knitted fabric
  • Colors:  One side is Light Gray-camouflage, the second side it Gray (the silver is embedded in this side).
  • Please note that the RF Blocking ability of a piece of clothes is also largely dependable on the design of the application.
  • Washable with limitation, please see Londry_info_and_instructions below
  • Delicate fabric (not as durable as the  S190 or S240 but softer to wear)
  • Very Flexible
  • Stretchable
  • Possible applications: Scarf, Sock hat, Hoodie, shirt, delicate cardigan, other.
  • Made in CHINA
  • Sent from ISRAEL
  • Tax & VAT may be subjected on arrival of the fabric according to your country laws.
  • Once cut, there is no money-back guarantee on this product
  • All our RF blocking fabrics are cut off a large roll of fabric according to customer specifications. We are sorry, but the return of these items is not possible.
  • We use the S200S – RF BLOCKING FABRIC for our sock hat and scarf

 

Screening/Blocking Tests

  • Please note that the following outcomes is for the range that was tested according to our ability or manufacturer’s ability.
    It is possible the fabric might be able to screen/block also higher/lower frequencies.
  • EMF Screening according to the manufacturer’s datasheet: -30 to -40 dB across 1GHz-10GHz.
  • Our Demo EMF screening tests between 300 MHz and 5000 MHz in %(dB):
    • 0 degrees- AVR=99.97%(39.34dB), Low=99.89%(29.8dB), Max=99.99%(49.7dB)
    • 90 degrees – AVR=99.92%(33.3dB), Low=99.76%(26.3dB), Max=99.99%(43dB)
    • ress here for the full demo report….
      S200S Summary of RF Test report
      S200S Summary of RF Test report

       

  • * For professional and military use, we recommend to order one linear meter as a sample and then test it for your own need in your lab.
  • * For EHS people we recommend to first order a BC190 or BC240 and see how it feels, before buying many items or fabric.

 

Londry info and instructions

  • Washable (use gentle cycle, if possible wash inside a pillowcase, use soft soap, 400 c, * please see washing tests and feedback on the bottom of this page).
  • Please make sure your detergents do not contain:  Magnesium Chloride, Sodium Chloride or Chloride element .
    The silver fabric can easily react to Magnesium Chloride and Sodium Chloride, then produce silver Chloride.
    When silver Chloride meets light , it will make the silver in the fabric turn black, and the silver fibers will be damaged.
    The chemical change of the fibers will also reduce the fabrics’ ability to block RF radiation.
    When washed again the water will become black as well.
    In some cases the silver fibers will also react to Magnesium Nitrate.
  • Cut a small piece of the fabric and test the fabric’s reaction to your water and detergents before washing the all fabric.
  • If the water or the fabric turns black, try using distilled water and other detergents.
  • Please see more info below at – https://www.4ehsbyehs.com/product/s200s/#Tests_after_washings_cycles

 

Videos

Fabric Presentation – https://youtu.be/Oi5K784_uqo

RF Blocking Demo – https://youtu.be/ZpK3P6FuAM0

 

 

 

More Fabric Test results

Test of New Fabric

5 tests cycles of the fabric in a self build testing chamber, with DECT 1.8GHz as a source and a CORNET ED88TPLUS as a meter.
The tests were done on a new piece of fabric that case covered with plastic sheeting to make it easier to handle (I later learned that the covering decrease the level or reduction/blocking by a small percentage.
Date 28/10/2018
Time 15:12
Source DECT 1.8GHz
Source location middle back
Meter/spectrum analyzer CORNET ED88TPLUS
Background level 0.000578
Level without protection
White paper with lamination
Level without protection 2
White paper with lamination 2
Type of protection S200S Metal side to the source
Without Protection test #1 87.4
With Protection test #1 0.694
Reduction in % test #1 99.20594966
Without Protection test #2 89.5
With Protection test #2 0.694
Reduction in % test #2 99.22458101
Without Protection test #3 89.5
With Protection test #3 0.663
Reduction in % test #3 99.25921788
Without Protection test #4 87.4
With Protection test #4 0.679
Reduction in % test #4 99.22311213
Without Protection test #5 87.4
With Protection test #5 0.694
Reduction in % test #5 99.20594966
Worse case Reduction % 99.20594966

Tests after washings cycles

Tested in a self-build testing chamber, with DECT 1.8GHz as a source and a CORNET ED88TPLUS as a meter.
The tests were done again and again on the same piece of fabric, without a plastic sheeting, that was washed in a washing machine, with normal waters from the tap and with soap (Persil Gel), in 40-60 celsius degrees.
Tests were done between 14-17/11/2018
Background levels were lower than 0.0005mW/m2
Below is a summary of the outcomes
CYCLE NUMBER 1 60″C 2 40″C 2 tilt 90 degrees 3 60″C 4 60″C 5 60″C 6 40″C
WITHOUT 87.4 162.9 162.9 87.4 159.2 178 166.7
WITH S200S 0.865 0.5648 0.711 0.05 0.16 0.17 0.2
Att % 99.01029748 99.65328422 99.56353591 99.94279176 99.89949749 99.90449438 99.880024
Att dB -20.04495325 -21.89616745 -20.89641832 -32.42541428 -27.3739145 -27.11062511 -26.40481437

* So far (02/2021) only one customer have reported that the RF Blocking effect was reduced after several washing in a washing machine. So dependable on your water, soap, washing routine and tap water, the fabric ability can be lost. Please make sure you are handling and washing it with care and caution.

 

Additional information

Weight 0.3 kg

Reviews

There are no reviews yet.

Be the first to review “S200S – RF BLOCKING FABRIC”

Your email address will not be published. Required fields are marked *