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27
Transducer installation principles
Topics
Transducer installation in a blister, page 27
Transducer installation in a flush mounted steel tank, page 30
Transducer installation in keel box, page 32
Transducer installation using drop keel, page 33
Smooth surface is important, page 36
Using a suitable inclination angle, page 36
Transducer installation in a blister
A recommended method for transducer installation is by using a blister. The blister must be
designed and manufactured by the installation shipyard to fit the transducer, as well as the
vessel’s size and hull shape. The transducer may be added to an already existing blister that
also holds other flush mounted transducers.
Illustration:
A
Blister
B
Mounting frame
C
Cable service loop
D
Transducer
E
Clamping frame
F
Screws
The best performance is obtained with
a blister height of 40 cm or more. A
streamlined shape and rounded edges
reduce the flow noise. A vertical leading
edge or front will guide the aerated water
to the sides of the blister.
The orientation of the blister should
follow the water flow.
The interior of the blister must be filled with sea water. Use drainage holes in the bottom and
an air outlet on the top. The water pressure behind the transducer will then compensate for
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