| |
The contrast table of presenting market EM strips
Manufactory |
|
μ0.005 |
μm |
λs（x10-6） |
Content of cobalt |
We |
Higher cobalt content strips |
140000 |
280000 |
<1 |
60%~70% |
Some others |
Normal cobalt content strips |
10000 |
210000 |
<5 |
40~50% |
Some others |
Lower cobalt content strips |
|
|
|
<40% |
Some others |
Iron EM strips |
μ0.01
1500 |
65500 |
10~35 |
0 |
3. The duration of life
The life duration of the burglarproof strips depend on users most.
? The actual life duration of iron strips is about 3 years. But water or humid environment make Iron EM strips rust easy and the rusted iron strips will lose their capability even forever.
? Cobalt strips have excellent corrosion resistance with limitless actual life duration, especially high cobalt content strips (60%~70%). |
