Simrad 18-11 - DATASHEET REV C Datasheet

18 kHz single-beam transducer
for large depths

(859-130404 Rev.C)

Introduction

The 18-11 is a large, single-beam transducer with a
relatively narrow beam. It is ideal for use in ocean
depth measurement to a maximum depth of 7000 m.

Order number

KSV-088693

Technical specication

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 .......................................... 60 ohm

Max. variation in |Z| ........................ 45 to 80 ohm

Max. variation phase angle.......................±30 deg

TRANSDUCER

Simrad 18-11

Transmitting response................................176 ±2 dB

(dB re 1µPa per V)

Receiving sensitivity, open circuit ........... -168 ±2 dB

(dB re 1V per µPa)

Electroacoustic efciency ......................... 0.60 ±0.20

Maximum pulse power input ......................... 2000 W

Maximum continuous power input ..................100 W

Maximum transducer depth ............................... 50 m

Cable length ....................................................... 20 m

Cable diameter ................................................ 11 mm

Weight without cable .........................................85 kg

Storage temperature ..............................+70 to -20 °C

Manufa cturer:
Simrad A S
Stra ndpro menaden 5 0
P.O.Box 111
N-3191 Horten
Telepho ne: [phone]
Telefax: [phone]
Internet: ww w.simr ad.com

Admittance

Outline dimensions

Beam pattern

Installation example

Data

Installation