Clean the surface from dust and moisture
1
Remove the indicator from the substrate
2
Install the indicator on measuring device
3
Smooth it over the surface thoroughly
4
View of the installed indicator
5
View of the indicator after exposure to a magnetic field
6
Position of the magnetic elements after exposure to a magnetic field
7
View of the indicator after trying to remove it from the counter surface
8
How to use
Design features
The design of the indicator is a seal-sticker with a polymer container located on it, in which four rare-earth magnetic elements installed on a special basis. (Fig. 1)
Fig.1
Fig.2
Fig.3
Under the influence of a constant magnetic field, magnetic elements shift from the equilibrium condition and attract to each other. At the same time, their primary position changes irreversibly (Fig. 2).
At an attempt to remove the indicator from the surface of the meter the hidden message "VOID OPEN" appears. (Fig. 3).