Simrad ES 18 - DATASHEET REV C Datasheet

TRANSDUCER
Simrad ES 18
18 kHz split-beam
transducer
Introduction
The ES 18 is a split-beam transducer incorporating 44
tonpilz elements distributed over four quadrants. The
following specications are valid when all four quad-
rants are connected in parallel.
Order number
KSV-088694
Technical specications
Resonant frequency.........................................18 kHz
Circular beamwidth.....................................11 ±2 deg
Directivity:
D .......................................................... 300 ±20 %
DI=10 log D ...........................................25 ±1 dB
Equivalent two-way beam angle:
ψ ....................................................... 0.020 ±20 %
10 log ψ ............................................... -17 ±1 dB
Side lobes ..........................................less than -18 dB
Back radiation ...................................less than -35 dB
Impedance:
Nominal value .......................................... 15 ohm
Max. variation in |Z| ........................ 11 to 20 ohm
Max. variation phase angle.......................±30 deg
Transmitting response .............................182.0 ±2 dB
Receiving sensitivity, open circuit ........... -174 ±2 dB
Electroacoustic efciency ......................... 0.60 ±0.20
Maximum input pulse power .........................2000 W
Maximum continuous input power .................100 W
Maximum transducer depth ............................... 50 m
Cable length ....................................................... 20 m
Cable diameter ............................................. 17.3 mm
Weight with cable ..............................................85 kg
Storage temperature ..............................+70 to -20 °C
(dB re 1µPa per V)
(dB re 1V per µPa)