S200S - RF BLOCKING FABRIC

US$160 per linear meter (170cm wide)
Add to cart the S200S fabric
Washable, Flexible, double layer, silver based RF Blocking fabric!
S200S RF Blocking Silver Fabric

About the S200S RF EMF/EMR Blocking Fabric

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(CcamouflageGray has no steel in it.  

RF Blocking effect - Fabric's RF blocking effect = 30-40dB according to manufacture 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 good RF Blocking effect.
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 test outcomes at the bottom of this page. 
The fabric does not block ELF magnetic fields from electric cabinets/equipment and power lines).

The Fabric is durable 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: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).
  • EMF Screening according to our tests: Better than -20dB /99% reduction according to our tests, even after washing the fabric (see at the bottom of this page).
  • EMF Screening according to the manufacturer's data sheet: -30 to -40 dB across 1GHz-10GHz.
  • Please note that the RF Blocking ability of a piece of clothes is also largely dependable on the design of the application.
  • Washable 400
  • Very Flexible
  • Stretchable
  • Possible applications: Scarf, Sock hat, Hoodie, shirt, delicate cardigan, other.  
  • Made in China
  • Shipped from Israel 
  • Tax may be subjected according to your country laws
  • Default Delivery: ECO POST - 1-3 weeks if available to your country. To rest of the work Registered Air mail.
  • Special Express - EMS - 1 to 2 weeks - US$30 extra

All our RF blocking fabrics are cut off a large roll of fabric according to customer specifications. We are sorry, but return of these items is not possible.




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Videos and pictures

RF Blocking Demo - https://youtu.be/ZpK3P6FuAM0
Fabric Presentation - https://youtu.be/Oi5K784_uqo


S200S RF Blocking Silver Fabric

S200S RF Blocking Silver Fabric
above - S200S both sides

S200S RF Blocking Silver Fabric
above - New RF Blocking fabric S200S -  the metallic side
S200S RF Blocking Silver Fabric
S200S RF Blocking - The non-Metallic side

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More info and links


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. 

Date28/10/2018
Time15:12
SourceDECT 1.8GHz
Source locationmiddle back
Meter/spectrum analyzerCORNET ED88TPLUS
Background level0.000578
Level without protection
White paper with lamination
Level without protection 2
White paper with lamination 2
Type of protectionS200S Metal side to the source
Without Protection test #187.4
With Protection test #10.694
Reduction in % test #199.20594966
Without Protection test #289.5
With Protection test #20.694
Reduction in % test #299.22458101
Without Protection test #389.5
With Protection test #30.663
Reduction in % test #399.25921788
Without Protection test #487.4
With Protection test #40.679
Reduction in % test #499.22311213
Without Protection test #587.4
With Protection test #50.694
Reduction in % test #599.20594966
Worse case Reduction %99.20594966



Tests after washingsing 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, 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 NUMBER1 60"C2 40"C2 tilt 90 degrees3 60"C4 60"C5 60"C6 40"C
WITHOUT87.4162.9162.987.4159.2178166.7
WITH S200S0.8650.56480.7110.050.160.170.2
Att %99.0102974899.6532842299.5635359199.9427917699.8994974999.9044943899.880024
Att dB-20.04495325-21.89616745-20.89641832-32.42541428-27.3739145-27.11062511-26.40481437