Simrad ES70-7C
Split beam echo sounder transducer
M A X I M I Z I N G Y O U R P E R F O R M A N C E A T S E A
www.SIMRAD.com
Technical specifications
The following specifications are
valid when all four quadrants are
wired in parallel.
• Resonant frequency: 70 kHz
• Circular beamwidth: 7 deg
• Directivity:
D: 650
DI = 10 log D: 28 dB
• Equivalent two-way beam angle:
Ψ: 0.009
10 log Ψ: -21 dB
• Side lobes: Less than -23 dB
• Back radiation: Less than -40 dB
•
Nominal impedance: 19 ohm
• Transmitting response:
185 dB re 1μPa per V
• Receiving sensitivity, open
circuit: -190 dB re 1V per μPa
•
Electro-acoustic efficiency: 0.75
•
Max. pulse power input: 1000 W
•
Max. continuous input: 10 W
•
Max. transducer depth: 20 m
• Cable length: 20 m
•
Cable diameter: 10.6 mm
•
Weight without cable: 6.4 kg
• Storage temperature: -20° to 70°C
Introduction
The
Simrad ES70-7C
is a split-
beam composite transducer with a
large bandwidth. This provides a fine
range resolution, which is important
for single fish detection and target
strength measurement. The transducer
has four quadrants.
Order number
KSV-203678
Beam pattern
-30
0
30
(CD017019A)
-10
-30
-20
Admittance
(CD017019B)
30
20
10
0
-10
-20
0
10
20
30
40
50
85
55
70
Conductance, mS
Susceptance, mS