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Place motion sensors at “choking-points”— areas
where people have to walk through, like the stair-
well or main hallway. That way, an intruder will
trip the sensor regardless of where they are head-
ed. Make use of all the advantages the 3 motion
detection methods provide.
6.2. Installation Consideration
Keep in mind that motion sensors aren’t error-proof. False alarms are usually caused
by light sources with a high IR percentage and heating (or cooling) systems (PIR) or
electrical interferences from fluorescent lights and mobile devices (MW).
PIR motion sensors work best when the intrud-
er walks parallel to the sensor, not towards it. For
example, in a hallway you tend to walk parallel to the
walls, not directly towards them. For MW sensors
the case is the other way around. Walking towards
them will result in a much earlier detection. If both sensors are coupled by the AND
logic, this will lead to a problem. Setting up your IN-Motion 500 so that both sen-
sors can trigger an alarm (OR mode - see page 4 /DIP5 has to be in the OFF posi-
tion to decouple both sensors). This might lead to a higher number of false alerts
But those can be levelled by coupling the sensor with the software-based motion
detection inside your INSTAR HD camera. Please check your camera´s web user
interface under
Alarm / Action
about details on this mode of operation.
Motion Detectors that combine PIR with a microwave sensor are the better but
more expensive choice. Since each operates in different areas of the spectrum, and
one is passive and one is active, dual technology motion sensors are not as likely
as other types to cause false alarms, because in order for the alarm to be triggered,
both sensors have to be tripped. Therefore, the false alarm is minimized compared
to a single PIR sensor. However, due to various reasons, there may be difficulties
in some installation to use the combined PIR and microwave sensor (DIP5 switch
“AND” mode) to detect an alarm, it is recommended to use the “OR” mode of DIP5
Switch instead together with the camera’s motion detection.
