Simrad 50-18 - REV B, Datasheet, Page: 1 / 2

TRANSDUCER
Simrad 50-18
50 kHz Single-beam transducer
(855-160965 Rev
.B)
Introduction
The 50-18 is a small, single-beam transducer incorpo-
rating seven Tonpilz elements in a polyurethane hous-
ing. Its compact design requires little space and
it is employed extensively with navigational echo
sounders. A compatible steel tank and mounting
ring are also available.
Order number
KSV-082606
Technical specications
Resonant frequency.........................................50 kHz
Beamwidth, circular...................................18 deg ±3
Directivity:
D...........................................................100 ±20%
DI=10logD .............................................20 ±1 dB
Side lobes..........................................less than -15 dB
Back radiation ...................................less than -25 dB
Impedance:
Nominal...................................................60 ohms
Max. variation in |Z| .........................45 - 80 ohms
Max variation in phase angle .........................±30 deg
Transmitting response................................207 dB ±2
re 1µPa per A
Receiving sensitivity, open circuit ........... -181 dB ±2
re 1V per µPa
Electroacoustic efciency ......................... 0.70 ±0.20
Maximum pulse power input ...........................500 W
Maximum continous power input ......................10 W
Maximum transducer depth ............................... 10 m
Cable length ....................................................... 20 m
Cable diameter ..................................... 10.9 ±0.4 mm
Weight without cable ..........................................2 kg
Weight with cable ............................................5.5 kg
Storage temperature ................................-20 to 70 °C