WSS 500 Series User’s Manual/Installation Note
DEIF A/S Page 7 of 25
Bird avoidance kit
The bird avoidance kit is designed to reduce the risk of birds landing
on the WSS 500 series sensors and thereby interfering with
measurements, or even damaging the sensitive ultrasonic transducer
heads. The black rubber heads are known to attract some birds’
attention because of the click-sound they give off.
The bird avoidance kit is mounted as standard on the WSS 500 series
and can be purchased as an optional extra to mount on previous WSS
versions.
Note that the kit does not provide complete protection against birds,
but especially large sea birds will not be able to land, while small birds
may still be able to squeeze inn. Small birds may interrupt the wind
measurement, but will not be able to damage the sensor.
The shape and location of the spikes has been designed so that the
interference with wind measurements is negligible.
Installation of the kit (retrofit only)
1. Position the metal ring with spikes
around the stainless steel top plate of
the WSS 500 series sensors. Position it
so that the spikes do not block the
direct paths between the three black
rubber heads; see picture.
2. Secure the metal ring using the M3x6
screw provided. It is recommended to
secure the screw from loosening due to
vibrations with a drop of Loctite® super
glue or equivalent (not included in the
kit) and tighten the screw all the way in.
When the kit is mounted on the WSS 500 series sensor,
more snow may be able to accumulate on top of the
sensor, and it may melt slower.
When the WSS 500 series is mounted on a horizontal
mast or surface, it must be raised at least 0.7 metres to
avoid birds sitting next to it – eating the sensor heads!
