+44 (0)1262 490234    sales@neptune-sonar.co.uk

Echo-sounders » Dual Frequency Transducers » Model 340 Series

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Model 340 Series

Model 340 Series

The 340 SERIES is a high performance over- moulded, dual frequency transducer featuring both high and low frequency sections combined in a single unit. 

Compatible with a wide range of echo-sounders the piston elements are configured to achieve optimum echo-sounder performance. 

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

The polyurethane housing provides a mechanically robust, corrosion free transducer, suitable for hull or over-side mounting. 

The 340 SERIES is available with or without acoustic calibration, traceable to National Standards. Transducer impedance can be adjusted to suit customers specification.

Technical Specification

Resonant Frequency (Nominal)
  • 33/210 (Other frequency options available, download datasheet)
Beam Pattern
  • 33 kHz Degrees Conical @ 16.5x25
  • 210 kHz Degrees Conical @ 7.5
  • 3.5 kHz @ 33 kHz
  • 15 kHz @ 210 kHz
Transmit Sensitivity
  • 168 dB re 1μPa/V 1m @ 33 kHz
  • 170 dB re 1μPa/V 1m @ 210 kHz
Receive Sensitivity
  • -175 dB re 1V/μPa @ 33 kHz
  • -193 dB re 1V/μPa @ 210 kHz
Nominal Impedance
  • 100 Ohms
  • 100 Ohms
Transmit Voltage / Duty Cycle (Max)
  • 325 Vrms at 10% @ 33 kHz
  • 175 Vrms at 10% @ 210 kHz

Mechanical Specification

Weight Air/Water (including 10m cable)
  • 6.4 kg / 1.1 kg
  • Not fitted as standard
  • (Optional Customer Specific)
Operating Temperature
  • -5 to +40 °C
Storage Temperature
  • -40 to +80 °C
Cable Type
  • Ø12mm Polyurethane Jacket, Screened 4 Core
Operating Depth
  • 300m Standard
Cable Length
  • 10 metres standard
  • (Additional lengths supplied to order)

Our Company

Formed in 1990, Neptune Sonar is now the leading company in underwater transducer technology, offering one of the world's largest and most comprehensive range of undersea defence and commercial transducers.

Based in the UK, our research and manufacturing operation is located on a 25-acre site in East Yorkshire. With a 60,000 square metre trials lake and a floating calibration laboratory, the site provides an extensive range of facilities supporting every aspect of acoustic transducer development from modelling and design to final product acceptance.

We also provide PZT components from our Zeus Piezoceramics facility in Hessle, East Yorkshire.

Neptune Sonar Limited
Kelk Lake
East Yorkshire
YO25 8HG

T: 01262 490234
E: sales@neptune-sonar.co.uk
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We design, manufacture and test acoustic sensors and electronics for...

  • Naval Defense
  • Maritime Security
  • Offshore Oil & Gas
  • Hydrographic Survey Industry
  • Oceanographic Science
  • Environmental Sectors
  • Aquaculture