Effects Of Reflective Surfaces - Panasonic SF4D Series Instruction Manual

Protection Area

2-3-3 Effects of Reflective Surfaces

If there are reflective surfaces where the device is to be installed, install so that light reflected
from the reflective surfaces does not enter the receiver. Or prevent reflection from the surface by
coating or masking the surface, roughening the surface, changing materials, or otherwise. Risk of
death or serious injury if the device becomes incapable of detection because measures are not
taken to prevent reflection.
Install the device at a distance greater than or equal to the distance A (m) indicated below from
a metal wall, floor, ceiling, or sensing object, or a cover, panel, or glass with a reflective surface
(surface with high reflectivity).
A
Emitter
A
Distance (sensing range L) between emitter and receiver
Permissible device installation distance from reflective surface
24
<Side>
Reflective ceiling
Sensing range
L
Reflective floor
When 0.2 to 3m
When 3 to 15m
Installation
allowed area
Distance L (m) between emitter and receiver
WARNING
Receiver
Emitter
Installation
prohibited area
© Panasonic Industrial Devices SUNX Co., Ltd. 2017
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Reflective surface
A
5°
Sensing range
L
Permissible installation distance A
0.131m
L / 2 × tan5 ≈ L × 0.0437 (m)
Receiver