Legrand CS Series 360° PIR - Manual (Page 3)

PLACEMENT
The effective coverage distances may be slightly less than the maximum
sensing distance (see Coverage Patterns), depending upon obstacles such as
furniture or partitions, and this must be considered when planning the
number of sensors and their positioning. See the list below for approximate
coverage distances for different types of motion.
Approximate coverage, for a mounting height of 8 feet:
Lens option
Walking motion Workstation (hand motion)
High Density up to 12 ft radius (500 sq ft) 9 ft radius (300 sq ft)
Extended Range up to 22 ft radius (1200 sq ft) 12 ft radius (500 sq ft)
The CS sensor can be mounted at various heights. When mounting at
heights other than 8 feet, be aware that as you decrease the mounting
height, you will decrease the range and increase the sensitivity to smaller
motions. Conversely, when you increase the height, you will increase the
range and decrease the sensitivity to smaller motions. At heights of more
than 12-14 feet, you may start to significantly reduce sensitivity.
Often the best location to install
a CS sensor in a closed office is
off-center (see fig.1). Avoid placing
a sensor directly in line with an
open door in which it has a clear
view out, as the sensor may detect
people walking by. For open office
areas with partitions it is best to
place sensors over intersections
of four workstations (see fig. 2).
Also avoid placing the sensors close to
air ducts, as rapid air currents or the
differences in temperatures may cause
false activations. For large areas of
coverage use multiple sensors.
CS Sensor
36'
36'
12'
18'
CS Sensor
fig. 1
fig. 2
Call 800.223.4185 for Technical Support