TRANSDUCER
Simrad ES 120-2.5x10
120 kHz Split-beam transducer
(855-164280 Rev.C)
Introduction
The ES120-2.5x10 is a split-beam transducer incor-
porating 172 piezo-ceramic elements distributed over
four quadrants. Its beam pattern has an elliptical cross-
section and the side lobes in the vertical plane are very
low. This unit is well suited for horizontal ranging
in shallow waters using the narrow beam in the verti-
cal plane. The following specications are valid when
all four quadrants are connected in parallel.
Order number
KSV-111154
Technical specications
Resonant frequency.......................................120 kHz
Beamwidth:
Vertical .............................................2.5 deg ±0.5
Horizontal............................................9.5 deg ±1
Directivity:
D......................................................... 1400 ±20%
DI=10logD ..........................................31.5 ±1 dB
Equivalent two-way beam angle:
Ψ.....................................0.0043 ± 20% steradain
10 logΨ................................................. -23 ±1 dB
Side lobes:
Vertical ........................................less than -20 dB
Horizontal....................................less than -15 dB
Back radiation ...................................less than -25 dB
Angle sensitivity:
Vertical ..............................................................60
Horizontal..........................................................14
Impedance:
Nominal...................................................60 ohms
Max. variation in |Z| .........................45 - 80 ohms
Max variation in phase angle .........................±30 deg
Transmitting response .............................185.0 dB ±2
re 1µPa per V
Receiving sensitivity, open circuit ........... -187 dB ±3
re 1V per µPa
Electroacoustic efciency ......................... 0.30 ±0.20
Maximum pulse power input .........................1000 W
Maximum continous power input ......................30 W
Maximum transducer depth ............................... 20 m
Cable length ....................................................... 20 m
Cable diameter ............................................. 10.6 mm
Weight without cable ..........................................7 kg
Storage temperature ................................-20 to 70 °C
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