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EMC Countermeasure Products
Ideal for mobile devices, notebook PCs, and inspection and testing equipment
EM shielding bag
Improving the efficiency of testing portable wireless terminals
This is a multi-functional EM shielding bag developed by Medical Aid Co., Ltd.
made in Japan
Performance does not deteriorate even if folded repeatedly!
It can be used for more than 5 years by using maintenance spray!
Shielded boxes are widely used for testing wireless terminals. However, there were problems such as not being able to see the screen display of the DUT placed inside the box, and the cumbersome test operation of opening and closing the box to operate the DUT.
Shielded bags using honeycomb-shaped electromagnetic wave blocking mesh "MG Net" allow the DUT's screen to be visually observed from the outside, and the keys on the terminal device can also be operated.
A single layer of MG Net blocks electromagnetic waves at over 20 dB, a double layer at over 35 dB, a triple layer at over 40 dB, and a quadruple layer at over 50 dB, allowing the shielding performance to be adjusted depending on the application.
※If the shielding performance is too high, the effects of reflection and resonance may become greater, which may increase electromagnetic interference to the test object or other equipment. The EM shielding bag provides an optimal environment for EMC countermeasures.
【Features】
- ■You can operate the device through the bag while looking at it.
- ■Easy to handle and resistant to friction and folding
※The shielding performance does not deteriorate even after repeated folding.（When ordinary shielding mesh or sheet materials are folded, the metal parts peel off or break, causing a deterioration in performance.） - ■Conductive rust-proofing ensures performance for over 2 years※Silver fibers that have not been treated with conductive anti-rust coating will lose their performance within about a year due to sulfidation and chlorination.
- ■Can be used for more than 5 years with maintenance spray
- ■They are inexpensive and easily portable, so you can provide them to all developers and use them for remote work.
- ■Selection based on required shielding effect（20dB､35dB､40dB､50dB）
- ■Various sizes available, custom orders also available
- ■Silver fiber is used, so it is less likely to cause metal allergies like nickel-plated fabric.
【Applications】
- ■Preventing interference from multiple wireless transmitters in a shielded room
- ■Simple blocking of external radio waves
- ■Suppression of illegal radio wave emissions during wireless transmitter testing
- ■When developing games or apps, you can check how the app works depending on the communication conditions by changing the number of MGnet layers in the shielding bag.
Examples of companies that have adopted this product
Usage example
The honeycomb mesh EM shielding bag allows the inside to be seen and the bag to be operated from the outside. To use the bag, simply place the device in the bag and fold the opening down.
※Use the sealing belt that comes with EMCSB2045 and EMCSB3245.
When shielding bags are stacked, the shielding performance changes, so you can check the operation of devices and apps by changing from conditions where it is easy to connect to conditions where it is difficult to connect to conditions where it is not possible to connect.
① Pass the sealing belt through the bag
② Insert your smartphone etc. along with your hand
③ Fit with a sealing belt
① You can operate your smartphone etc. from inside the bag
Example of using a shielding bag and acrylic case when pairing devices
When kitting multiple devices such as PCs, iPads, and smartphones at the same time, you may end up in a situation where you pick up all Bluetooth devices in the same space that are preparing for pairing and are unable to distinguish between them. In that case, if you put each device in an EM shielding bag, it will be difficult to communicate with devices other than those in the shielding bag, so you can distinguish between devices in the shielding bag and other devices even if they have the same device name. In addition, the honeycomb mesh MGnet can be seen and operated from the outside, so you can operate it from above the bag during kitting work.
①Place the device you want to pair in the acrylic case.
②Insert the acrylic case into the shielding bag
※See arrow: Leave a gap so that the net touches the screen only when you are performing an operation.
③Controlling devices over the Internet
Adopted as a countermeasure against pulse bombs for satellite phone terminals
The high altitude electromagnetic pulse (HEMP) generated by a pulse bomb generates an electric field strength of approximately 50 kV/m (DC several 10 MHz), which induces high-voltage currents in electronic equipment, including information and communication devices on the ground, as well as power and communication lines. It is expected that if an electric field strength of 10 kV/m or more is irradiated even for a moment, it will destroy electronic equipment and electronic systems.
EM shielding bags are single-layered and have the ability to attenuate electric field strength to 1/50 or less, making them effective as a countermeasure against pulse bombs for electronic equipment. Countries, local governments, and important infrastructure facilities such as power and communication companies need measures to protect satellite phone terminals in satellite phone communication networks, which are the only ones that can survive a pulse bomb, from destruction.
Our "EM shielding bag" has been adopted by major power companies' nuclear power plants, the Ministry of Defense, and others, and is used as an electromagnetic shielding cover for storage to protect satellite phone terminals from HEMP. The reason for its adoption is that our unique high functionality and safety have been highly evaluated, such as: ● Easy to put on and take off; ● Can be seen and operated from the outside; ● Does not trap heat; ● Highly resistant to folding and abrasion; ● Maintains performance for over 10 years when stored unopened; ● No need to worry about metal allergies even when touched with hands.
Satellite phone terminal equipment compatibility list
We have received many inquiries about electromagnetic shielding bags, which are effective in countering cyber terrorism. Please feel free to contact us if you have any questions or concerns regarding their implementation.
Adopted by police as a bag for transporting evidence such as smartphones to institutions for analysis.
The system was adopted to transport smartphones and other evidence seized by police to specialized institutions for analysis after they are turned off and placed in an EM shielding bag to block radio waves from outside and prevent inadvertent communication. It has been introduced to 46 prefectural police stations.
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
| material | For EMCMGnet | Nylon fiber coated with silver for rust prevention | |
|---|---|---|---|
| package | Anti-oxidation airtight bag | Five-layer polymeric poly bag (with seal zipper) *If you store this product in an airtight bag without opening it, its performance will be maintained for more than 10 years. | |
| Shielding performance (KEC method) | 100kHz～3GHz | 1 piece | 23～30dB |
| 2-ply | 32～45dB | ||
| Electromagnetic wave shielding performance （Free Space Method） |
10MHz～1.4GHz | 1 piece | 30～40dB |
| 2-ply | 39～55dB | ||
| 7.75GHz～13GHz | 1 piece | 16～25dB | |
| 2-ply | 23～42dB | ||
| Durability | Indoor use | Service life: approx. 5 years. Manufacturer's warranty: 2 years | |
| Conductivity Surface resistance（Ω/10×10cm） | Vertical | 1.4Ω | |
| Horizontal | 3.3Ω | ||
Price list by size and performance (excluding tax)
※ ← Sealing belt is included.
| Part number | Width (opening) x height | Net quantity and performance | Sales price (excluding tax) |
|---|---|---|---|
| EMCSB1030-1 | 10×30cm（Approx.3g） | net1 layer（20dB） | 4,600yen |
| EMCSB1030-2 | 10×30cm（Approx.5g） | net2 layer（35dB) | 8,200yen |
| EMCSB2045-1※ | 20×45cm（Approx.7g) | net1 layer（20dB） | 11,000yen |
| EMCSB2045-2※ | 20×45cm（Approx.14g） | net2 layer（35dB） | 18,000yen |
| EMCSB3245-1※ | 32×45cm（Approx.10g） | net1 layer（20dB） | 15,000yen |
| EMCSB3245-2※ | 32×45cm（Approx.20g） | net2 layer（35dB） | 25,000yen |
| EMCSB4590-1 | 45×90cm（Approx.27g） | net1 layer（20dB） | 30,000yen |
| EMCSB4590-2 | 45×90cm（Approx.54g） | net2 layer（35dB) | 54,000yen |
| EMCSB6098-1 | 60×98cm（Approx.37g） | net1 layer（20dB） | 48,000yen |
| EMCSB6098-2 | 60×98cm（Approx.74g） | net2 layer（35dB） | 86,000yen |
| EMCSB100100-1 | 100×100cm（Approx.65g） | net1 layer（20dB） | 90,000yen |
| EMCSB100100-2 | 100×100cm（Approx.130g） | net2 layer（35dB） | 160,000yen |
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.
・EMCsheet、Compatible with electromagnetic shielding bags, EMCboxes, EMCtents, and EMC simple rooms
component
| Stock solution ingredients | CAS number |
|---|---|
| Acetate esters | 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 area is well ventilated, check the direction of the nozzle, hold the can 20-30cm away, shake the can vigorously about 10 times, and spray thinly and evenly over the entire surface. You can use the same method for up to 4 layers, but it is more efficient to spray in layers. After spraying, leave the can 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 Time2～3seconds
40cm×40cm（1600c㎡）Spray Time4～5seconds
50cm×50cm（2500c㎡）Spray Time6～7seconds
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.
Purchase Information
▼Telephone enquiries▼
TEL 0725-53-3270
※Please be careful not to enter the wrong number.
●Reception hours: Monday to Friday 9:00 to 17:00 (excluding New Year's holidays and public holidays)