+44 (0)1262 490234    sales@neptune-sonar.co.uk
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The D/26 spherical transducer is a versatile design providing omni-directional transmit and receive characteristics over a wide frequency band. 

The fully moulded construction, coupled with the inherent strength of the PZT ceramic sphere, achieves a robust, lightweight and corrosion free design making it the ideal choice as a high-power projector. 

The D/26 is available with or without acoustic calibration, traceable to National Standards.

Technical Specification

Resonant Frequency (Nominal)
  • 26 kHz
Beam Pattern
  • Omni ± 2 dB up to 35 kHz
Transmit Sensitivity
  • 148 dB re 1μPa/V @ 1m
Receive Sensitivity
  • -190 dB re 1V/μPa
Capacitance at 1 kHz (with 10m cable)
  • 42,000 pF
Transmit Voltage (Abs. Max)
  • 450 Vrms
Transmit Voltage / Duty Cycle (Max)
  • 450 Vrms @ 10%
  • 150 Vrms @ 100%

Mechanical Specification

Weight Air/Water (including 10m cable)
  • 1.9 kg / 0.5 kg
  • Not fitted as standard
  • (Optional BNC or Customer Specific)
Operating Temperature
  • -5 to +40 °C
Storage Temperature
  • -40 to +80 °C
Cable Type
  • Ø12mm Polyurethane Jacket, Screened Twisted Pair
Operating Depth
  • 2000m
  • (Optional 4000m – both may require an export license)
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