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

Communications » T218

Request Quote



The T218 is one of a group of transducers available from Neptune that have been designed for use in transponder beacons, tracking systems, acoustic release mechanisms and data communication systems. 

A versatile transducer the T218 combines efficient broadband transmission and reception with an hemispherical beam pattern. 

The over moulded construction achieves a design that is compact, lightweight and robust. 

The T218 is available with or without acoustic calibration, traceable to National Standards.

Technical Specification

Resonant Frequency (Nominal)
  • 22 kHz
Useful Frequency Range
  • 16 kHz to 30 kHz
Beam Pattern
  • Conical (See Graph)
Transmit Sensitivity
  • 155 dB re 1μPa/V @ 1m
Receive Sensitivity
  • -178 dB re 1V/μPa
Capacitance at 1 kHz (with 10m cable)
  • 25,000 pF
Transmit Voltage (Abs. Max)
  • 600 Vrms
Transmit Voltage / Duty Cycle (Max)
  • 600 Vrms @ 10%
  • 190 Vrms @ 100%

Mechanical Specification

Cable Type
  • Ø9mm Polyurethane Jacket, Screened Twisted Pair
Operating Depth
  • 6000m
Cable Length
  • 1m standard
  • (Additional lengths supplied to order)
Weight Air/Water (including 10m cable)
  • 2.1 kg / 1.1 kg
  • Not fitted as standard
  • (Optional Customer Specific)
Operating Temperature
  • -5 to +40 °C
Storage Temperature
  • -40 to +80 °C

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
Find us on LinkedInContact us

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