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EasySense quick guide
Occupancy Sensing Detection Pattern
The plots below show the top and side view of the occupancy coverage based on NEMA test, an industry
standard. In the side view, it is visible that coverage ration of height:diameter is 1:1. For example if the
mounting height is 12m, the diameter coverage is also 12m.
Disclaimer:
1. In these plots, the white areas are blind spots and the detection is based on subject's motion.
An idle subject may not continue to trigger occupancy detection once the hold time collapses.
2. As PIR based sensing works on temperature difference between the subject and the ground level,
the occupancy detection could vary due to clothing and size of humans.
Special Note: Ensure heat radiating devices are outside of the monitoring cone.
Avoid drafts (e.g. from ventilators or heating systems).
Daylight Sensor
The light sensor measures the total amount of light with an opening angle of 10 degrees whereas the PIR has an
angle of 30 degrees, all calculated from normal. The following aspects should be observed during installation:
•
Minimum distance from the window: see graph below
•
Prevent light reflections from outside entering the sensor (for example sunlight reflection on a car bonnet)
as this will lead to incorrect light regulation.
As a guideline the formula 0.174 x H can be used to calculate the minimum distance between the window and
sensor whereby H is the height from the bottom of the window to the ceiling.
Photosensor spatial response
SNH210 MC
Wall
Sensor distance
to window
Window
Floor
PLt-17265QG 04/21 philips.com/lighting page 3 of 4
SNH200
Sensor height with
respect to window
Max coverage – 16m
Horizontal position(m)
Minimum Distance from Window vs. Mounting Height
Minimum distance from window vs. mounting height
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
2
4
Sensor Mounting Height with Respect to Window [m]
Sensor mounting height with respect to window [m]
Note: Restrictions only for daylight regulation. No
restrictions for skylights.
Max. height – 16m
6
8
10
12
14
16
18
20
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