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ECHO SOUNDER TRANSDUCERS
Single Beam:
  Frequency Model
  12 kHz T 198
  24, 28, 30, 33, 38, 50 kHz 395 Series
  160, 200, 210, 300, 600 kHz 390 Series
  24, 28, 30, 33, 38, 50 kHz 147 Series
  24, 28, 30, 33, 38, 50 kHz 172 Series
  160, 200, 210, 300, 600 kHz 142 Series
  24, 28, 30, 33, 38, 50 kHz 320 Series
Dual Beam:
  Frequency Model
  24, 28, 30, 33, 38 kHz 153 Series
  12 kHz T 119
  120 kHz T 38
  200 kHz T 37
  210 kHz T 28
Dual Frequency:
  Frequency Model
  33 & 210 kHz T 141
  24, 28, 30, 33, 38, 50 kHz
160, 200, 210, 300, 600 kHz		 76 Series
  24, 28, 30, 33, 38 kHz
160, 200, 210, 300, 600 kHz		 77 Series
  24, 28, 30, 33, 38 kHz
160, 200, 210, 300, 600 kHz		 340 Series

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:: TRANSDUCER PRODUCTS / Dual Frequency Transducers MODEL 77 Series
DUAL FREQUENCY
 30 LF / HF COMBINATIONS
 FISHING : NAVIGATION : SURVEYING
 HULL MOUNTING
 LOW SIDE-LOBES
 ROBUST NYLON HOUSING
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The 77 SERIES is a popular range of high performance, dual frequency transducers offering a versatile sounding system with high resolution and good range performance.

The design features both HIGH and LOW frequency sections combined in a single unit.

The ability to specify a wide combination of frequencies in the same basic unit, provides the echo sounder manufacturer and hydrographer with the flexibility to select a system to meet the desired survey requirements of resolution, range, silt penetration and beam pattern.

The high impact strength nylon body provides a mechanically robust and corrosion free transducer.

This product is stocked by our world-wide distributor:

GSE Rentals Ltd, Aberdeen
Tel: +44 (0) 1224 771247
Fax: +44 (0) 1224 723116
Email: info@gserentals.co.uk
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Technical Specification
Low Frequency Section
Frequency 24 kHz 28 kHz 30 kHz 33 kHz 38 kHz 50 kHz Khz
Beam Angle @ -3dB 23 19 18 16.5 14 11 Degrees
Source Level 167 168 168 167 166 171 dB re uPa/V @ 1m
Receive Sensitivity -164 -166 -167 -168 -169 -178 dB re V/uPa
Input Power 1000 1000 1000 1000 1000 1000 Watts
Bandwidth 2.8 3.5 3.0 3.5 3.5 5.0 kHz
Nominal Impedance 75 75 100 100 100 75 Ohms
High Frequency Section
Frequency 160 kHz 200 kHz 210 kHz 300 kHz 600 kHz - Khz
Beam Angle @ -3dB 12 8 7.5 7 5 - Degrees
Source Level 175 175 174 172 174 - dB re uPa/V @ 1m
Receive Sensitivity -187 -186 -187 -174 -204 - dB re V/uPa
Input Power 300 300 300 300 300 - Watts
Bandwidth 14 20 28 28 57 - kHz
Nominal Impedance 65 65 75 75 75 - Ohms
Transducer impedance can be adjusted to suit customers specification
Cable Length 10 metres standard
(Additional lengths supplied to order)
Cable Type Polyurethane Ø12mm 4 Core Screened
Storage Temperature -40 to +80°C
Operating Temperature -5 to +70°C
Ordering Information
77, low frequency, high frequency, cable length 
 
   
       
       
   

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