AVS Electronics BM60HP Mode D'emploi page 42

A corridor large not less than 0,6 meters for BM60HP
and not less than 2 meters for BM120HP and
BM200HP, must be left free from obstacles
between transmitter and receiver; a clear
visual must always be granted in this
area
E
N
G
The suggested height for the installation is
between 1 and 1,2 meters.
near a building or a fix fence, a
minimum distance of 1 meter for
BM60HP and 5 meters for BM120HP and
BM200HP must be kept.
This is required in order to avoid false alarms
caused by reflection of microwave
beam.
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If a couple must be installed