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D/70/H

D/70/H
  • INTEGRAL PRE-AMPLIFIER
  • MAXIMUM CABLE LENGTH 500M
  • OMNI-DIRECTIONAL RESPONSE
  • LOW NOISE PERFORMANCE
  • BROADBAND OPERATION
  • MARINE MAMMAL AUDIO SENSOR

The D/70/H is a true spherical balanced element combined with a low noise differential pre-amplifier. 

Signals can be transmitted along cable lengths up to 500m, without any degradation. The preamplifier gain options of 20, 30 and 40 dB (are pre-set during manufacture) to suit the customer requirements. 

A differential to single ended ‘Surface Receiver’ (Type T400) which includes additional filter and gain settings, can be supplied separately. 

The D/70/H is available with or without acoustic calibration which is traceable to National Standards.

Technical Specification

Resonant Frequency (Nominal)
  • 70 kHz
Useful Frequency Range
  • 5 Hz to 100 kHz
Beam Pattern Horizontal
  • Omni ±2 dB at 80kHz
Beam Pattern Vertical
  • 240° ±3 dB at 80kHz
Receive Sensitivity
  • -173 dB re 1V/μPa with 20dB gain
  • -163 dB re 1V/μPa with 30dB gain
  • -153 dB re 1V/μPa with 40dB gain
  • (Gain is preset and cannot be adjusted)
Power Supply
  • +20 to +30 Volts dc @ <100mA
  • 25mA quiescent, 100mA
  • (Max)
Noise
  • <3nV/√Hz RTI
Output
  • Differential, 100Ω Impedance

Mechanical Specification

Connector
  • Not fitted as standard
  • (Souriau type if used with T400 Surface Receiver)
Operating Temperature
  • -5 to +40 °C
Storage Temperature
  • -40 to +80 °C
Cable Type
  • Polyurethane Ø8mm Twisted Pair (power) and Screened Twisted Pair
  • (signal)
Operating Depth
  • 900m Standard
  • (Optional 1500m - may require an export license)
Cable Length
  • 10 metres standard
  • (Additional lengths supplied to order)
Weight Air/Water (including 10m cable)
  • 0.80 kg / 0.22 kg

Our Company

Formed in 1990, Neptune Sonar is now a 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.

Neptune Sonar Limited
Kelk Lake
Kelk
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