5
Installing the
Wireless Outdoor PIR Detector in challenging situations
In the following situations, rapid and significant infrared radiation changes can happen in both
PIR channels together, resulting in false alarms and therefore care should be taken.
1. Situations in which metal and/or glass objects measuring over 70cm (2’4”) in height from the
ground are in the field of view of the detector (cars, metal gates, shutters, metal walls,
windows, etc.)
2. Situations in which a reflective surface on the ground larger than 1m (3’4”) in diameter may
cause reflection into the detector’s lens. Examples of a reflective surface on the ground are a
puddle, wet road or car park, smooth concrete or asphalt surface, swimming pool, etc.
Water Reflection
Notes:
1. Please note that any outdoor PIR detector will require reduction in range to a shorter distance than the car,
metal object or surface reflection (so that these objects won’t be protected) in order to eliminate false alarms.
2. For full 15m (50’) coverage in the above situations, it is highly recommended to install the Wired DT Outdoor
Detector, the only outdoor detector with 2 PIR channels and 2 Microwave channels.
3.
Wireless Outdoor PIR detectors include high quality Silicon filters on the PIR sensors for blocking out
white light interferences. These filters are not intended to block infrared thermal radiation.
Summary of Contents for EL-4800
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