The use of magnets to stop meters is no surprise to anyone, even though it is completely illegal. To protect the device from the influence of a constant magnetic field and to record such tampering, a special indicator can be used in the form of an anti-magnetic sticker.
The magnetic field influence indicator is a sealing sticker with a polymer container placed on it, in which magnetic elements made of rare-earth material are located on a special base. The magnetic indicator operates stably at air temperatures from -40ºС to +80ºС, resistant to solar radiation, relative humidity up to 100% (at temperatures up to +60ºС), oxidative thermal aging, and mineral oil.
The magnetic field indicator is suitable for all types of meters. All indicators are compact, convenient and easy to use, durable and tamper-resistant.
Under the influence of a constant magnetic field, the magnetic elements shift from their equilibrium condition and attract each other. At the same time, their original position changes irreversibly, confirming tampering by someone. When attempting to remove the indicator from the surface of the device, the hidden message "VOID OPEN" appears.
The indicator is installed once and cannot be removed without breaking its integrity. If the indicator is installed in a hard-to-reach place, a mirror is used to inspect it.
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| Type of indication: | By magnets |
| Operating threshold: | >100 mT |
| Features: | Shock-resistant |
| Dimensions, mm: | 60x26x5 |
| Sequential numbering: | 7-digit |
| Logotype: | Alphabetic |
| Method of marking: | Laser engraving |
| Operating temperature, °С: | -30 °С to +80 °С |
| Warranty period: | 6 years |
Under the influence of a constant magnetic field, magnetic elements shift from their equilibrium position and attract each other. At the same time, their initial position changes irreversibly (Fig. 2).
When attempting to remove the indicator from the meter surface, the hidden message "VOID OPEN" appears (Fig. 3).
Fig.2 Fig.3
