High frequency electromagnetic wave shielding box
EMCbox（Magnetic door type / Zipper type）
Electromagnetic shielding box for simple EMI measurement and electromagnetic interference countermeasures
made in Japan
Free design possible according to test conditions
In recent years, with the development of wireless communication technology, there are many electromagnetic waves in the air. Even if you try to measure EMI during the development stage of equipment, it is not simple in places with poor electromagnetic environments. It is often the case that the measurement results are actually external noise.
The EMC box reduces the effects of external noise and enables simple EMI measurement. It is also effective in reducing electromagnetic interference between devices.
【Features】
- ■Freely design according to the shape of the object
- ■The magnetic door opens and closes with one touch
- ■The zippered type can be stored and carried around
※No deterioration even after repeated folding - ■The mesh is 1mm or larger (opening rate of 80% or more), so it has good light collection, ventilation, and heat dissipation properties, and is see-through so that the test object can be visually observed.
- ■The shielding performance of the material is in the range of 32 to 60 dB, so there is little effect of internal reflection or resonance.
- ■Uses silver fibers, so it is less likely to cause metal allergies like nickel-plated fabric.
【Shielding properties】
The EMC box uses a fabric (MG net) made of silver-coated nylon fiber. The shielding performance (KEC method: 100kHz to 60GHz 32 to 60dB) can be changed by layering the mesh material (2 to 4 layers).
EMCboxのEconomy Typeuses MG sheet (copper nickel coating) on part of the shielding material (side, back, bottom), and the ventilation and heat dissipation are about 30% lower than the standard specification, but the shielding performance is the same. Also, the number of times it can be folded in tent style is limited to 50 times.
Used on the four surfaces of the MG sheet "Economy Type A": side, back, and bottom
Examples of companies that have adopted this product
Recommended for the following uses
- ・Preliminary testing can be done in the usual work area before the actual testing in the anechoic chamber.
- ・Easily create an electromagnetic wave shielding environment at research institutes such as universities and hospitals
- ・As an EMC measure to prevent malfunctions caused by electromagnetic noise from electronic devices
- ・Prevents noise interference from electromagnetic waves from mobile phone base stations
- ・Radio Law Measures: See "Regulations for Weak Radio Stations" below
Radio Law Measures「Regulations for low power radio stations」
If the electric field strength (radio wave strength) at a distance of 3 meters from the wireless equipment is lower than the specified level (500uV/m for frequencies less than 322MHz and 150GHz or higher, 35uV/m for frequencies between 322MHz and 10GHz, and 35uV/m to 500uV/m for frequencies between 10GHz and 150GHz), then a wireless station license is not required.
図：Permitted value of electric field strength at a distance of 3m for weak radio stations
If the electric field strength emitted from a device is 10V/m at a distance of 1cm, the electric field strength at a distance of 3m is inversely proportional to the distance and can be calculated as follows:
E3m ＝ E1cm /（3m/0.01m）
E1cm = 10V/m
The ratio of the distances is3m/0.01m = 300
E3m ＝ 10V/m / 300 = 0.033 V/m
If the electric field strength is 10 V/m at 1 cm, the electric field strength at a position 3 m away will be 0.033 V/m. To attenuate the electric field strength of 0.033 V/m to 500 μV/m, a shielding performance of 36.4 decibels (dB) or more is required, and to attenuate it to 35 uV/m, a shielding performance of 59.5 decibels (dB) or more is required. EMC simple rooms that meet these requirements have a triple or six-layer shielding mesh (MGnet).
If the shielding performance of the shielded room currently in use does not meet the above regulations, you can make it meet the regulations by installing an EMCbox inside.（Example: If the performance of the shielded room is 45dB, and the performance of the EMCbox is 45dB, a total shielding performance of 90dB can be obtained.）
In addition, the Ministry of Internal Affairs and Communications Notification No. 173 specifies the performance and specifications of shielded rooms.
「Based on the regulations of Article 6, Paragraph 1, Item 1 of the Radio Construction Regulations (Regulations of the Radio Control Commission, No. 14 of 1950), the test facilities to be separately notified by the Minister of Internal Affairs and Communications are as follows: Radio anechoic chambers and other test facilities for carrying out research and development on radio waves or tests on conformity with technical standards prescribed in the Law and related documents, which are housed in metal shielding and are used at the operating frequency of radio equipment used inside the facilities.Those that clearly attenuate the electric field strength of leaked radio waves by 40 decibels or more」
If you let us know the specifications of the device to be measured, such as the electric field strength, we will propose products that meet your requirements.
How to use
Magnetic door type EMCbox
The magnetic door can be opened and closed with one touch, making it easy to take things in and out.※Patent acquisition
Zipper type EMCbox
シールドfastener封止（Foldable and portable ※The MG net material is resistant to bending and friction,The shielding performance does not deteriorate even after repeated folding.This is very important when choosing a foldable shielding box.）
The cords are pulled through the insertion sleeve and sealed in two places with stoppers and cable ties.※Be sure to seal both places
Optional items
Connector Panel Box
A connector panel box can be attached to prevent noise from entering through cables, and the type of connector can be selected.
Connector panel for magnetic door type
Tent-type connector box ※Insertion sleeve and connection
Hand insertion port
By attaching a hand insertion port, you can operate the device from outside. Since it is see-through, you can check the operation of the device.
Place it where you want it
Insert both hands to operate the device
Our CompanyMGInitiatives to prevent metal allergies in net products
- １．MGnet
- ２．General electromagnetic shielding materials
- A:titanium
- B:Gold, Silver, Platinum
- C:Zinc, manganese, copper
- D:Nickel-Cobalt-Chromium
Metal allergy is a condition in which the skin reacts to metals and chloride ions contained in sweat, causing a rash. Silver is a safe metal that is extremely unlikely to cause allergic reactions. Most common electromagnetic shielding materials use inexpensive metal plating such as nickel. Nickel dissolves more easily than other metals when it comes into direct contact with the skin, and if you sweat, it dissolves even more easily due to the action of chloride ions in sweat, so care must be taken.
Our "MGnet" products are designed with safety and intended use in mind, and are coated with silver to minimize the risk of metal allergies. Also, unlike general products that have electromagnetic shielding material coated on the fabric, "MGnet" products are silver coated at the fiber level, making them resistant to abrasion and peeling of the coating material and durable.
specification
| Parts & Materials | Standard Type | MGnet for EMC countermeasures (pure silver fiber with conductive acrylic coating) is used on five surfaces: the front, ceiling, both sides, and back. | |
|---|---|---|---|
| Economy Type | MGnet (pure silver fiber with conductive acrylic coating) for EMC countermeasures is used on the front and ceiling, and MG sheets are used on both sides and the back. | ||
| Bottom & Seam Trimming | MG sheet (copper nickel coating) | ||
| Frame | Magnet sealing: Aluminum frame, Zipper sealing: Hot-dip galvanized steel pipe tightly coated with high-performance plastic | ||
| Sealing Method | Magnet sealing: Stainless steel + neodymium magnet Zipper sealing: Shielded zipper | ||
| Shielding performance (KEC method) | 100kHz～3GHz | 2-ply | 32～45dB |
| 4-piece | 50～60dB | ||
| Electromagnetic wave shielding performance (free space method) | 10MHz～1.4GHz | 2-ply | 39～55dB |
| 4-piece | 50～60dB | ||
| 7.75GHz～13GHz | 2-ply | 23～42dB | |
| 4-piece | 40～60dB | ||
| Shielding performance of MG sheet (KEC method) | 100kHz～1GHz | 40～50dB | |
| Shielding performance of MG sheet (ASTM method) | 1GHz～61GHz | 80dB以上 | |
| Conductivity of MG sheet | Surface Resistance | 0.5Ω | |
| Durability | Indoor use | Service life: approx. 5 years. Can be used for 10 years or more with maintenance spray. 2-year manufacturer's warranty | |
| Conductivity Surface resistance (Ω/10×10cm) | Vertical | 1.4Ω | |
| Horizontal | 3.3Ω | ||
Electromagnetic shielding performance of EMCbox
EMCbox tent type price list by size and performance (excluding tax)
The prices below are for the EMCbox tent. The following options will be quoted separately.
●Hand insertion port: 80,000 yen～
- ・The front of the entrance and the ceiling are made of MGnet, while the four surfaces (both sides, the back, and the bottom) are made of MG sheet (conductive fabric).
- ・MG sheets are opaque, so regular types have better breathability, heat dissipation, and lighting.
- ・There are differences in durability, and the number of times it can be folded is limited to 50 times, while the normal type has no limit.
- ・MG sheets have high shielding performance, so they are greatly affected by reflections and resonance.
| Part Number | Dimensions (W×D×H) / Weight | Shielding Layers / Performance | Price (Excl. Tax) |
|---|---|---|---|
| EBOXT0505-2 | 50×50×50cm (Approx. 5kg) | Double | |
| EBOXT0505A-2 | 50×50×50cm (Approx. 5kg) | Double (35dB) | 300,000 yen |
| EBOXT0505-3 | 50×50×50cm (Approx. 5.5kg) | Triple (45dB) | 410,000 yen |
| EBOXT0505A-3 | 50×50×50cm (Approx. 5.5kg) | Triple (45dB) | 330,000 yen |
| EBOXT0505-4 | 50×50×50cm (Approx. 6kg) | 4-layer (50dB) | 470,000 yen |
| EBOXT0505A-4 | 50×50×50cm (Approx. 6kg) | 4-layer (50dB) | 360,000 yen |
| EBOXT1006-2 | 100×100×60cm (Approx. 7kg) | Double (35dB) | 570,000 yen |
| EBOXT1006A-2 | 100×100×60cm (Approx. 7kg) | Double (35dB) | 480,000 yen |
| EBOXT1006-3 | 100×100×60cm (Approx. 7.5kg) | Triple (45dB) | 700,000 yen |
| EBOXT1006A-3 | 100×100×60cm (Approx. 7.5kg) | Triple (45dB) | 550,000 yen |
| EBOXT1006-4 | 100×100×60cm (Approx. 8kg) | 4-layer (50dB) | 820,000 yen |
| EBOXT1006A-4 | 100×100×60cm (Approx. 8kg) | 4-layer (50dB) | 620,000 yen |
| EBOXT1010-2 | 100×100×100cm (Approx. 9kg) | Double (35dB) | 700,000 yen |
| EBOXT1010A-2 | 100×100×100cm (Approx. 9kg) | Double (35dB) | 550,000 yen |
| EBOXT1010-3 | 100×100×100cm (Approx. 9.5kg) | Triple (45dB) | 880,000 yen |
| EBOXT1010A-3 | 100×100×100cm (Approx. 9.5kg) | Triple (45dB) | 620,000 yen |
| EBOXT1010-4 | 100×100×100cm (Approx. 10kg) | 4-layer (50dB) | 1,040,000 yen |
| EBOXT1010A-4 | 100×100×100cm (Approx. 10kg) | 4-layer (50dB) | 700,000 yen |
EMCbox magnetic sealed price list by size and performance (excluding tax)
The prices below are for the EMCbox magnetically sealed type.
The following options will be quoted separately.
●Connector panel (cuts out line noise from various cables) from 200,000 yen
●Hand insertion port 80,000 yen～
※Economy Type (～A) differs from the regular type in the following ways:
- ・The front of the entrance and the ceiling are made of MGnet, while the four surfaces (both sides, the back, and the bottom) are made of MG sheet (conductive fabric).
- ・MG sheets are opaque, so regular types have better breathability, heat dissipation, and lighting.
| Part Number | Dimensions (W×D×H) / Weight | Shielding Layers / Performance | Price (Excl. Tax) |
|---|---|---|---|
| EBOXD0505-2 | 50×50×50cm (Approx. 5kg) | Double (35dB) | 450,000 yen |
| EBOXD0505A-2 | 50×50×50cm (Approx. 5.5kg) | Double (35dB) | 380,000 yen |
| EBOXD0505-3 | 50×50×50cm (Approx. 5.5kg) | Triple (45dB) | 550,000 yen |
| EBOXD0505A-3 | 50×50×50cm (Approx. 6kg) | Triple (45dB) | 415,000 yen |
| EBOXD0505-4 | 50×50×50cm (Approx. 6kg) | 4-layer (50dB) | 600,000 yen |
| EBOXD0505A-4 | 50×50×50cm (Approx. 6.5kg) | 4-layer (50dB) | 444,000 yen |
| EBOXD1006-2 | 100×100×60cm (Approx. 7kg) | Double (35dB) | 700,000 yen |
| EBOXD1006A-2 | 100×100×60cm (Approx. 7.5kg) | Double (35dB) | 550,000 yen |
| EBOXD1006-3 | 100×100×60cm (Approx. 7.5kg) | Triple (45dB) | 800,000 yen |
| EBOXD1006A-3 | 100×100×60cm (Approx. 8kg) | Triple (45dB) | 620,000 yen |
| EBOXD1006-4 | 100×100×60cm (Approx. 8kg) | 4-layer (50dB) | 900,000 yen |
| EBOXD1006A-4 | 100×100×60cm (Approx. 9.5kg) | 4-layer (50dB) | 680,000 yen |
| EBOXD1010-2 | 100×100×100cm (Approx. 9kg) | Double (35dB) | 800,000 yen |
| EBOXD1010A-2 | 100×100×100cm (Approx. 10kg) | Double (35dB) | 630,000 yen |
| EBOXD1010-3 | 100×100×100cm (Approx. 10kg) | Triple (45dB) | 950,000 yen |
| EBOXD1010A-3 | 100×100×100cm (Approx. 11kg) | Triple (45dB) | 720,000 yen |
| EBOXD1010-4 | 100×100×100cm (Approx. 11kg) | 4-layer (50dB) | 1,100,000 yen |
| EBOXD1010A-4 | 100×100×100cm (Approx. 12kg) | 4-layer (50dB) | 800,000 yen |
Information on maintenance products
MG Conductive Anti-rust Spray330ml
Features
Maintenance supplies to maintain performance. Conductive anti-rust coating prevents deterioration of silver fibers. Contains tin for electrical conductivity.
・Supports EMCsheet, electromagnetic shielding bag, EMCbox, EMCtent, and EMC simple room
component
| Stock solution ingredients | CAS Number |
|---|---|
| Acetate ester | 141-78-6 |
| Isopropanol | 67-63-0 |
| Ethylene glycol monobutyl ether | 111-76-2 |
| Acrylic resin solution | 104609-24-7 |
| Conductive material | tin |
How to use
Make sure the spray nozzle is facing in a well-ventilated area, hold the can 20-30cm away, shake the can 10 times, and spray thinly and evenly over the entire surface. The same method is fine for up to 4-piece sprays, but it is more efficient to spray in layers. Allow to dry indoors for 1-2 hours after spraying.
Spray time: 1 can can spray for 270-300 seconds
The spray time varies depending on the area as follows:
20cm×20cm（400c㎡）Spray time 1 to 1.5 seconds
30cm×30cm（900c㎡）Spray time 2-3 seconds
40cm x 40cm (1600cm2) Spray time 4-5 seconds
50cm x 50cm (2500cm2) Spray time 6-7 seconds
Frequency of use
For shielding bags and sheets that are touched daily, spray once every three months. For tents and shielding boxes that are not touched, spray after the first year and then use once within the next two years; the product's performance will hardly deteriorate even after five years or more.
※Spray frequency varies depending on usage.
MG Clear Coat Spray480ml
Features
Maintenance supplies to maintain performance. Acrylic coating prevents deterioration of silver fibers. Non-conductive type
Since it is not conductive, please use it from the outside in a closed state.
Compatible products: EMCbox, EMCtent, EMC simple room
component
| Stock solution ingredients | CAS Number |
|---|---|
| Acetate ester | 141-78-6 |
| Isopropanol | 67-63-0 |
| Ethylene glycol monobutyl ether | 111-76-2 |
| Acrylic resin solution | 104609-24-7 |
How to use
Make sure the area is well ventilated, check the direction of the nozzle, spray thinly and evenly over the entire area from 20-30cm away. The same method is fine for up to 4-piece sprays, but it is more efficient to spray in layers. After spraying, leave it to dry indoors for about 1-2 hours.
Spray time: 1 can can spray for 270-300 seconds
The spray time varies depending on the area as follows:
20cm×20cm（400c㎡）Spray time 1 to 1.5 seconds
30cm×30cm（900c㎡）Spray time: 2 to 3 seconds
40cm×40cm（1600c㎡）Spray time 4 to 5 seconds
50cm×50cm（2500c㎡）Spray time 6-7 seconds
Frequency of use
For shielding bags and sheets that are touched daily, spray once every three months. For tents and shielding boxes that are not touched, spray after the first year and then use once within the next two years; the product's performance will hardly deteriorate even after five years or more.
※Spray frequency varies depending on usage.
EMCbox Purchase Guide
▼Telephone enquiries▼
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