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D/140/H

D/140/H
  • INTEGRAL PRE-AMPLIFIER
  • OMNI-DIRECTIONAL RESPONSE
  • LOW NOISE PERFORMANCE
  • BROADBAND OPERATION
  • MARINE MAMMAL AUDIO SENSOR
  • MAXIMUM CABLE LENGTH 250 M

The D/140/H is a true spherical balanced element combined with a low noise differential pre-amplifier. 

Signals can be transmitted along cable lengths up to 250m, without any degradation. The preamplifier gain options of 20, 30 and 40 dB (pre-set during manufacture) are to suit customer requirements. 

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

The D/140/H is available with or without acoustic calibration which is traceable to National Standards.

Technical Specification

Resonant Frequency (Nominal)
  • 150 kHz
Useful Frequency Range
  • 10 Hz to 200 kHz
Beam Pattern Horizontal
  • Omni ±2 dB at 160kHz
Beam Pattern Vertical
  • 240° ±3 dB at 160kHz
Receive Sensitivity
  • Gain is pre-set and cannot be adjusted.
  • -178 dB re 1V/μPa with 20dB gain
  • -168 dB re 1V/μPa with 30dB gain
  • -158 dB re 1V/μPa with 40dB gain
Power Supply
  • +20 to +30 Volts dc @ < 100mA
  • 25mA quiescent, 100mA (Max)
Noise
  • <3nV/√Hz RTI
Output
  • Differential, 100Ω Impedance

Mechanical Specification

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)
  • 0.76 kg / 0.18 kg
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)

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