Introduction
The LG2WP3020 & LG2WP6004 wireless Passive Infra Red Detectors (PIR)
have been designed to meet the newest and most demanding requirements of
the CCTV market. These new, stylish detectors are available in two different
detection patterns and use superior Black Mirror Technology to provide excellent
detection with minimal false alarms.
The two ranges are:
30 metres out x 20 metres across or
60 metres out x 4 metres across.
ENCLOSURE.
LG2 detectors have a modern styling which disguises the product’s true function
and helps them to blend in with modern architecturally designed buildings. The
front window is made of pigmented HDPE which hides the mirror and the main
body of the enclosure is ABS with a high quality paint finish. Both parts are UV
stabilized and the weather proof rating is IP65.
BLACK MIRROR TECHNOLOGY.
These new PIR’s use mirror technology instead of Fresnel lenses. The large
mirror provides significantly more optical gain which allows a thick EPDM front
filtered window to be used without the need to increase sensitivity.
White light from car headlights can cause false alarms, so it is important to filter
out this interference. Most PIR detectors use pigmented windows or Fresnel
lenses and sometimes an extra silicon filter to reduce white light, but this has the
effect of also reducing the infrared energy and consequently detection range.
The Black Mirror acts as a selective optical filter for body heat infrared with mini-
mal loss while filtering out unwanted white light by as much as 14000 LUX.
The combination of high optical gain and white light filtering means that the elec-
tronic sensitivity is much lower and therefore the risk of false alarms from electri-
cal interference and component noise is greatly reduced.
The other problem of running amplifiers at extremely high gain is that they reach
saturation which obscures any signature that the micro controller would use to
accurately determine the validity of a detection.
The Luminite LG2 amplifier runs at a relatively low level and with the combina-
tion of the adaptive focal length optically sharp edges of each mirror segment
together with the sophisticated detection algorithm has the result is accurate de-
tection at various speeds and distances.
LG2 WP-3020 & WP-6004 Wireless PIR Detector Installation Handbook Page 4.
LG2 WP-3020 & WP-6004 Wireless PIR Detector Installation Handbook Page 13.
Types of tamper:
Front cover micro switch.
Activated when the cover screw is removed.
Rear tamper Hall effect and magnet.
The magnet is fixed to the wall and when the product is removed the magnet is
left behind.
Shock sensor.
Piezo sensor on mother board detects physical attack of the product.
Anti masking.
Active IR and LDR sense when the front window is obscured. These sensors
always face the same direction as the mirror.