Magnetic Field Indicator MFI-2

The magnetic field indicator MFI-2 is the very sensitive passive indicator, designed for the permanent registration of a magnetic field presence. Inter alia, it can be used for the identification of attempts to affect measuring devices (e.g. watt-hour meters, water meters, gas meters) with a permanent magnet (ferrite, AlNiCo, neodymium, etc.) whose operation correctness, and thus the measuring accuracy of the medium used, is disrupted by an external magnetic field.