One of the easiest ways to protect electronic equipment from the damaging effects of an EMP is to store them in RF-shielded bags. The challenge becomes picking out bags that provide the highest level of shielding. Most bags sold on the internet have never even been tested for shielding effectiveness. Don’t be fooled by people testing with stun guns – that’s just for show and completely irrelevant to EMP protection.
With a PhD in electrical engineering, I was fortunate enough to have the equipment to test numerous brands of bags for their shielding effectiveness. The Dri-Shield 3400 series bags were shown to be superior to all others, providing approximately 50 dB of shielding across all relevant EMP frequencies (100 kHz to 1 GHz). That means they will reduce the electric field by at least 99.7%, reducing even a worst-case 50,000 V/m down to 158 V/m – a level that most electronics would survive.
A few questions that I am often asked:
1. Is one layer really enough? The short answer is YES. A good EMP bag can reduce the fields by 99.7% or more. That’s enough for protect nearly any electronic item. This may not be true with other bags, so if they’re suggesting multiple layers, the company is either uncertain of their product, trying to dupe you into buying more than you need, or have a product that is not quite up to these standards.
2. How do I seal up the bags? If you’re needing to get in and out of the bag, just fold it over twice and tape with any standard tape. There’s no need for conductive tape; Scotch tape will do fine. If you want to permanently seal the bag, you can use a hot iron to melt the top closed.
3. Do you make these bags? No. I re-sell them for another company. They in turn buy them direct from the manufacturer. Anyone can buy them, so you can certainly go out and set up a retailer account and buy them yourself. You’ll save a few dollars, but honestly, not much. The bulk of the cost is in the shipping.
4. Why are you re-selling them? I received so many requests to recommend bags, and then when I did, folks couldn’t figure out where to buy them in small quantities. I finally decided to be the middle man and help people order high-quality EMP bags.
5. Can I trust that these are the best bags out there? They’re the best bags I’ve tested, and I’ve tested quite a few. What’s more important is that have been shown to be effective for the frequencies of an EMP. Many other companies (no names mentioned) sell their bags using hype and misleading tests.
If you’d like to see more about how I conducted the tests, check out my videos on youtube. One of them in which I test a garbage can and EMP bags is given below:
These high-quality EMP bags are offered in various quantities and sizes below:
a. 5 Jumbo bags, size 36” x 24”, cost is $55, free S/H
b. 5 Ex-Large bags, size 24” x 24”, cost is $50, free S/H
c. 10 Large bags, size 20” x 20”, cost is $55, free S/H
d. 10 Medium-Large bags, size 16” x 18”, cost is $45, free S/H
e. 10 Medium bags, size 12” x 16”, cost is $35, free S/H
f. 10 Small bags, size 10” x 12”, cost is $30, free S/H
g. Mixed Lot w/4 sizes (2 of 20″x20″, 2 of 16″x18″, 2 of 12″x16″, 2 of 10″x12″), cost is $35, free S/H
h. Mixed Lot w/5 sizes (2 of 24″x24″, 2 of 20″x20″, 2 of 16″x18″, 2 of 12″x16″, 2 of 10″x12″), cost is $50, free S/H
i. Mixed Lot w/6 sizes (2 of 36″x24″, 2 of 24″x24″, 2 of 20″x20″, 2 of 16″x18″, 2 of 12″x16″, 2 of 10″x12″), cost is $65, free S/H