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The TriField
Natural EM Meter was designed to do field
measurements for special research. It detects
changes in extremely weak static (DC or "natural")
electric and magnetic fields, and signals
with both a tone and the movement of a needle-type
gauge if either the electric or magnetic field
changes from previous levels. Its
sensitivity is of interest to researchers in the
field of parapsychology. Every type of detectable
physical manifestation requires a certain amount
of energy. For example, "moving air" requires the
expenditure of a small amount of energy to get the
air to move initially. A radio
and microwave detector is also included, which
reads radio power directly. Because man-made AC
electric and magnetic fields are very common and
could interfere with readings of static fields,
the meter has been designed to ignore AC fields.
Normal construction materials don't block magnetic
fields, so the meter can be placed indoors and
will work equally well, and due to the built-in
tone, it can be used in the dark, and will sound
the tone at whatever level of field the user sets.
It operates on a standard 9-volt battery.
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