1200 Metal knit EMI/RFI gasket

The knitted wire mesh EMI/RFI shielding gasket is a universal EMC gasket to shield lower frequencies.
Highly effective EMI/RFI shielding with an optional dust & fluid seal for electrical contact at removable or fixed panels, doors, flanges and lids.

The Metal knit EMI/RFI shielding gaskets of the 1200 series consist of a layer of knitted electrically conductive metal wires on attached to a low-closure force rubber or elastomer core. For heavy-duty applications like EMP or high temperatures, a fully metal version is available. Sometimes a Metal knit EMI/RFI gasket is combined with an environmental seal to provide IP rating, depending on the materials used.

Knitted wire mesh gaskets provide a cost-effective solution to high shielding performance applications in the magnetic and electrical fields, including EMP. The gaskets can be made either completely from knitted metal mesh or from knitted metal mesh over an elastomer core which allows recovery after compression.

For high frequency shielding, foil-based gaskets like Amucor Shield 6800 series will perform better, because of their much larger contact surface. Please refer to the explanatory image below.


Contact points of Metal knit gasket vs. Amucor shield

Contact points of metal knit gasket
Contact points of metal knit gasket
Contact points of Amucor shield
Contact points of Amucor shield

Benefits

  • High attenuation for lower frequencies
    (low-frequency magnetic shielding)
  • Suitable for use under extreme conditions
    (military applications)
  • Wear resistant
  • Not susceptible to corrosion
  • Various conductive materials against tension corrosion
  • Roll lengths of 1 to 1000 meters (depending on width and height of the gasket)
  • Tools required: pair of scissors
Metal knit EMI/RFI gasket
Metal knit EMI/RFI gaskets
Metal knit EMI RFI gasket in in a groove
Metal knit EMI/RFI gasket in in a groove
Metal knit EMI/RFI gasket combined with water seal
Metal knit EMI/RFI gasket combined with water seal

Options (on request)

  • Custom made in the dimensions specified
  • Available with flame-retardant core
  • Available with conductive self-adhesive
  • Available with chemical-resistant rubbers like EPDM
  • Silicone sponge for high temperatures up to 220°c
  • Cut into accurate lengths
  • As a ready made frame

Applications

Used to seal enclosure lids and doors, removable cover plates and interface gaskets for EMI shielded vent panels and EMI/RFI shielded windows.


Optimum compression/density

The maximum deflection with a sponge elastomer core is approximately 30%, with hollow extrusion 50%. This is why the hollow type is used more often.

Compression levels are important in applications such as liquid filtration and noise attenuation, where flow resistance is critical.


Temperature resistance

Temperature resistance depends on the core material of the metal knit EMI/RFI gasket; ranges from -60°C up to 220°C are possible. These Metal knit EMI/RFI gaskets are insensitive to external influences and can withstand harsh conditions very well.


Technical specifications

Material Applications
Monel
Per QQ-N-281
BS 3075 N A 13
Class A
diameter 0.11mm
The most commonly used material.
Insensitive to corrosion and neutral on the galvanic scale.
Aluminium
AMS 4187
BS 1475 5056A
Alloy 5056
diameter 0.13mm
Used in some cases for aluminium enclosures.
Aluminium can be chromed with an Al-chrome 1200 layer, if necessary.
T.C.S.
Steel core (57%)
Copper cladding (40%)
Tin plating (3%)
diameter 0.11mm
Excellent magnetic as well as electrical properties, because a Ferro alloy is covered with copper.
The outside is tinned to prevent corrosion.
Stainless steel
AISI 304
diameter 0.13mm
The strongest material with shielding performance comparable to aluminium. Highly wear resistant.

Shielding performance

Frequency Field Monel Aluminium TCS S/Steel
10 KHz H 45 40 60 40
100 KHz H 49 45 65 44
1 MHz H 60 60 85 58
1 MHz E 125 125 125 125
10 MHz E 120 120 120 120
100 MHz E 100 100 108 100
400 MHz P 98 95 99 94
1 GHz P 85 76 78 76
10 GHz P 80 65 62 60
These values are measured under laboratory conditions.
In other situations, results may differ; please read our Guarantee.

1200 series - Knitted wire mesh gaskets

In deze container wordt op de website een grafiek ingeladen.
Deze container niet bewerken s.v.p.
Grafiek: 1200 series - Knitted mesh (26)
Grafiek legenda

Please note : These values are measured under laboratory conditions. Results may vary in other situations; please read our Guarantee.


Stock dimensions

Round (R)

Metal knit gasket round technical drawing
D (mm) or D x d (mm)
1.6 4.8 x 3.2 9.5 x 6.4
2.4 6.4 11.1
3.2 6.4 x 3.2 11.1 x 8.0
3.2 x 1.6 7.9 12.7
4.0 8.0 x 4.8 12.7 x 9.5
4.8 9.5 14.9 x 11.1

Double round (DR)

Metal knit gasket double round technical drawing
d x w (mm)
1.6 x 9.5 3.2 x 12.7 6.4 x 15.9
1.6 x 12.7 3.2 x 15.9 6.4 x 19.1
1.6 x 15.9 4.8 x 15.9 6.4 x 25.4
2.4 x 12.7 4.8 x 19.1 9.5 x 25.4
3.2 x 9.5 4.8 x 25.4 12.7 x 25.4

Round with tail (T)

Metal knit gasket round with tail technical drawing
d x w (mm)
1.6 x 9.5 3.2 x 15.9 6.4 x 12.7 9.4 x 25.4
1.6 x 12.7 3.2 x 19.1 6.4 x 15.9 9.5 x 15.9
1.6 x 15.9 4.0 x 12.7 6.4 x 19.1 9.5 x 19.1
1.6 x 19.1 4.0 x 19.1 6.4 x 25.4 9.5 x 25.4
2.4 x 12.7 4.8 x 12.7 7.9 x 15.9 11.1 x 19.1
2.4 x 15.9 4.8 x 15.9 7.9 x 19.1 11.1 x 25.4
2.4 x 19.1 4.8 x 19.1 7.9 x 25.4 12.7 x 19.1
3.2 x 12.7 4.8 x 25.4 9.4 x 19.1 12.7 x 25.4

Rectangular (S)

Metal knit gasket rectangular technical drawing
w x h (mm)
2.4 x 3.2 6.4 x 3.2 19.1 x 12.7
2.4 x 4.8 6.4 x 6.4 20 x 6
2.4 x 6.4 6.4 x 9.5 20 x 8
3.2 x 1.6 12.7 x 6.4 20 x 10
3.2 x 3.2 12.7 x 9.5 20 x 12
3.2 x 4.0 12.7 x 12.7 20 x 20
3.2 x 4.8 15 x 6 25 x 6
3.2 x 6.4 15 x 8 25 x 8
3.2 x 9.5 15 x 10 25 x 10
4.8 x 4.8 15 x 12 25 x 12
4.8 x 6.4 15 x 15 25 x 18
4.8 x 9.5 15.9 x 9.5 25 x 20
6.4 x 1.6    

Metal knit gaskets with water seal/IP seal

All knitted mesh EMI/RFI gaskets can be produced with a water seal/IP seal.

The standard material for the fluid seal/water seal is Neoprene which can be adhesive-backed (indicated in red in the drawings) for easy installation. Alternatively, silicone sponge is also available.

Metal knit gasket with waterseal technical drawing

Washers (on request)

Optionally we can add electrically conductive washers to the gasket. For this we do ask you to send a technical drawing with the right dimensions and position of the washers.

Example image of knitted wire mesh washers
Example image of knitted wire mesh washers

Below is a list of available sizes.

Elastic washers tooling list

w x h (mm)
2.4 x 3.2 6.4 x 3.2 19.1 x 12.7
2.4 x 4.8 6.4 x 6.4 20 x 6
2.4 x 6.4 6.4 x 9.5 20 x 8
3.2 x 1.6 12.7 x 6.4 20 x 10
3.2 x 3.2 12.7 x 9.5 20 x 12
3.2 x 4.0 12.7 x 12.7 20 x 20
3.2 x 4.8 15 x 6 25 x 6
3.2 x 6.4 15 x 8 25 x 8
3.2 x 9.5 15 x 10 25 x 10
4.8 x 4.8 15 x 12 25 x 12
4.8 x 6.4 15 x 15 25 x 18
4.8 x 9.5 15.9 x 9.5 25 x 20
6.4 x 1.6    
Outside. Ø
[mm]
Inside. Ø
[mm]
6,5 4,0
7,5 4,0
9,5 4,8
10,2 5,8
12,7 6,0
12,7 8,0
12,7 9,0
15,9 6,4
15,9 9,5
15,9 12,0
19,0 8,0
19,1 12,7
19,1 15,0
21,4 15,9
22,0 17,5
24,1 19,7
25,0 4,0
25,0 12,0
25,0 20,5
25,4 15,9
30,0 10,0
30,0 25,5
32,0 15,9
33,0 28,5
33,5 19,5
34,9 28,6
39,0 34,0
40,0 32,0
43,0 38,5
43,4 37,0
47,6 30,3

Elastic contacts tooling list

Outside. Ø
[mm]
12,5
22,0
30,5
32,0
50,0

 

Metal knit gasket for EMI/RFI shielding | knitted wire mesh gasket EMI/RFI Metal knit gasket for EMI/RFI shielding | knitted wire mesh gasket EMI/RFI Holland Shielding Systems B.V. Holland Shielding Systems B.V.
Rated 4.3/5 based on 11 customer reviews
In stock
Product description: Knitted wire mesh gasket is a universal high attenuation level EMC/EMI/RFI gasket to shield lower frequencies, perfect for low-frequency magnetic shielding.

Technical datasheets

General documentation

To get a quotation for Knitted mesh within 24 hours fill in the form below.

Serie
Core
Select an option:
N : Not important
F : Full metal
O : Hollow full metal
C : Neoprene foam
S : Silicone
SF : Silicone foam
H : Hollow silicone tube
E : EPDM foam
Material
Select an option:
N : Not important
M : Monel
T : TCS
A : Alluminium
S : Stainless steel
E : Steel
Outside shape
Select an option:
R : Round
DR : Double round
T : Round with tail
S : Rectangular
Dimensions
Find the sizes in the dimension table above
Waterseal (Optional)
Select an option:
S : Standard waterseal
N : No waterseal
Waterseal width (mm)
If you want the gasket with a water seal then specify the width of
the waterseal in mm
* Note: The red blocks are required

7900

O-profiles

6800

Amucor shield

8700

V-shape gasket

7000

Standard shield

4700R

Flexible cable shield

2100

Clip-on fingerstrips