The
exact
definition
of
a
motion
detector
is
a
device
with
a
physical
mechanism
or
electronic
sensor
that
measures
motion.
Some
motion
detectors
have
alarms
in
addition
to
the
more
common
light.
It
is
very
likely
that
you
have
run
across
many
motion
sensors
in
your
life,
whether
you
know
it
or
not.
Many
different
places
employ
the
use
of
motion
sensors
for
many
different
reasons.
One
type
uses
motion
detector
radar
to
alert
door
sensors
when
individuals
come
near
them,
which
"tells"
an
attached
mechanism
to
open
the
door.
Now
that
you
are
familiar
with
motion
detectors,
let's
explore
the
different
types
that
exist.
There
are
actually
several
different
types
of
detectors.
The
internet
lists
all
different
types
of
alarms,
including
infrared.
These
identify
heat
producing
objects.
This
particular
kind
would
keep
the
light
and
alarm
from
turning
on
if
an
inanimate
object
flew
by.
If
you
are
more
interested
in
something
for
inside
your
home
or
office
for
security
reasons,
then
the
ceiling
mount
type
is
an
option.
These
cordless
radar
motion
detectors
can
cover
the
entire
room
when
mounted
on
the
ceiling.
The
most
common
use
for
motion
detectors
is
home
security.
They
are
highly
effective
for
many
different
reasons.
When
placed
outside
the
home,
many
have
a
light
that
goes
off
at
the
sign
of
movement,
and
others
will
sound
an
alarm.
This
alerts
the
resident
to
the
presence
of
someone
on
their
property.
Businesses
use
motion
sensors
mounted
on
the
ceiling
to
protect
rooms
that
are
off
limits
to
customers
or
certain
employees.
Businesses
also
use
motion
sensors
that
are
a
form
of
radar
to
open
doors
for
customers.
These
devises
use
one
radar
method
of
detector
radar
to
trigger
door
mechanisms
to
open.
Here
are
some
other
creative
ideas
for
motion
detectors.
Do
you
have
a
small
child
or
an
elderly
parent
living
with
you?
If
you
worry
about
them
leaving
their
room
at
night,
then
consider
using
a
motion
detector
radar
device.
They
can
be
set
to
a
very
low
chime
so
it
will
not
disrupt
your
entire
household.
You
could
even
place
a
motion
sensor
inside
your
front
door,
that
way
you
will
know
when
your
teenager
is
really
coming
home,
or
sneaking
out!
Using
them
beside
your
pool
can
be
useful,
so
that
unwanted
swimmers
cannot
sneak
in
for
a
dip.
Consider
taking
advantage
of
this
technology
by
using
motion
sensors
and
detector
radar
to
keep
your
family
safe!
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