120 kHz Split-beam transducer
(859-130990 Rev
.D)
Introduction
The ES 120-4x10 is a split-beam transducer with 108
piezo-ceramic elements arranged in four quadrants. The
specifi cations below are valid when all four quadrants
are wired in parallel. The beam pattern has an elliptic
cross-section suited for horizontal ranging in shallow
waters with the narrow beam in the vertical plane. The
side lobes in the vertical plane are very low.
Order number
KSV-111646
Technical specifi cations
Resonant frequency.......................................120 kHz
Beamwidth:
Vertical ......................................................4.4 deg
Horizontal.....................................................9 deg
Directivity:
D......................................................................850
DI=10logD .....................................................29.5
Equivalent two-way beam angle:
Ψ
................................................... 0.007 steradian
10 log
Ψ
....................................................-21.5 dB
Side lobes:
Vertical ........................................less than -25 dB
Horizontal....................................less than -18 dB
Back radiation ...................................less than -25 dB
Angle sensitivity:
Vertical ..............................................................36
Horizontal..........................................................18
Impedance:
Nominal...................................................19 ohms
Max. variation in |Z| .........................15 - 24 ohms
Max variation in phase angle ...................±30 deg
Transmitting response...........184.5 dB re 1µPa per V
Receiving sensitivity,
open circuit....................... -186 dB re 1V per µPa
Electroacoustic effi ciency ....................................0.50
Maximum pulse power input ...........................500 W
Maximum continous power input ......................20 W
Maximum transducer depth ............................... 20 m
Cable:
Length........................................................... 20 m
Diameter.................................................... 11 mm
Weight without cable ..........................................6 kg
Storage temperature ................................-20 to 70 °C
A L W A Y S
A T
T H E
F O R E F R O N T
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T E C H N O L O G Y
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