2-11
2 CFT-780 Transducer
The transducer is a highly refined product, containing piezoelectric sensor elements facing the
water and containing some matching circuits to achieve good matching to the cable (30 m of
cable is supplied as standard, option 40m).
122,00 mm
Transducer direction in centerline
( Front view of transducer head )
207,51 mm
of ship, facing forward
As seen, the transducer elements are clearly divided into the five SOG elements and the two
STW elements in a separate casing.
Electrically, each sensor element is connected via a matching transformer to a separately
shielded twisted pair. For transmission with the low frequency SOG part, a separate transmit
cable pair is used, that connects the signal to the three transducer elements used for
transmission.
The positioning of the transducer is very important. The water flow below the transducer must
not be turbulent or affected by skew water flows. Turbulent flow gives no common signal
between the two STW channels.
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