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The Chelsea Technologies Group manufacture a range of underwater acoustic transducers which are used as underwater acoustic sources over a wide frequency range. Click the blue balls below to find out more about some of our projectors / transmitters:
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Click to find out more about our range of HydrophonesHydrophones

Click to find out more about our range of Echo SoundersEcho Sounders

Click to find out more about Sidescan SonarsSidescan Sonar  

Click to find out more about our Custom Design CapabilityCustom Design Capability

Click to learn more about our Calibration ServiceCalibration Service

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300Hz-17.5Hz Broadband Acoustic Projector

SonoFlex - 850 Hz-4 kHz SonoFlex is a range of low frequency flexural disc transducers

SonoTube 6,000 - 4-12kHz SonoTube 6,000 is a range of broadband projector / receivers

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CTG1273 - Medium Frequency Wideband Projector CTG1273 - Medium Frequency Wideband Projector 

CTG1253 OmniSource Spherical Projector CTG1253 - OmniSource Spherical Projector   

CTG0615 - Dual Projector  CTG0615 - Dual Projector   

CTG0811-0259 - Tuned High Power Broadband ProjectorCTG0811-0259 - Tuned High Power Broadband Projector

CTG0811-0260 - Tuned High Power Broadband ProjectorCTG0811-0260 - Tuned High Power Broadband Projector

CTG811-0261 - Tuned High Power Broadband ProjectorCTG0811-0261 - Tuned High Power Broadband Projector

SonoFlex - 850 Hz-2400 Hz SonoFlex is a range of low frequency flexural disc transducersSonoFlex - 850 Hz-2400 Hz SonoFlex is a range of low frequency flexural disc transducers

CTG1330 Enhanced Performance Communications TransducerCTG1330 Communications   8-16kHz SonoTube 10,000 is a range of versatile projector / receivers

CTG0052 Communications - A new range of enhanced performance communications transducers 7kHz-20kHz CTG0052 Communications - A new range of enhanced performance communications transducers 7kHz-20kHz 

If you cannot find the exact acoustic source transducer you are looking for please send details of your requirement to sales@chelsea.co.uk.

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Medium Frequency Wideband Projector (CTG1273)

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The CTG1273 is a versatile, wideband, medium frequency projector. The projector is supplied in a robust housing with space for either a wideband tuning network or transformer. 

Typical Applications

  • Acoustic reference standard

  • Wideband medium frequency projector

Advantages

  • Broadband operation

  • Wideband medium frequency projector
  • Robust

Options

Model Number (standard) CTG1273-0011 (Inc 10dB Transformer) CTG1273-0001.
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12.5 kHz Broadband Projector (CTG1273)

Datasheet - 12.5 kHz Broadband Projector (CTG1273)
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Order Number

CTG1273

Nominal Resonant Frequency

12.5 kHz

Bandwidth

4.55 kHz

Transmit Sensitivity

148 dB re 1µPa/V@1m @ 12 kHz

Receive Sensitivity

-183 dB re 1V/µPa  @12kHz

Horizontal Beam Pattern

Omni directional± 1 dB

Vertical Beam Pattern

Omni - Hemi± 1 dB

Capacitance

63 nF

Maximum Input Voltage

600 Vrms

Maximum Input Power

1459 W

 

203 dB re 1µPa @1m

Dimensions

348/248 mm  length/diameter

Operating Depth

300 m

Cable/ Connector/ Mounting

CS/Subconn LPBH4M/ 
Specify cable, connector and calibration requirements

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OmniSource Spherical Transducer (CTG1253)


OmniSource is the Chelsea Technologies Group's range of industry standard, high quality, high performance spherical projector / receiver transducers. The transducers share many features with the OmniSense range of spherical hydrophones, however these acoustic transducers are optimised for transmit functions

OmniSource 56,000 - Spherical Transducer 

 

Datasheet -  Omnisource Spherical Projector (CTG1253)


.Typical Applications  

  • High power noise source

  • Communications systems

  • Marine mammal audio sensor

  • Air gun & boomer monitor

 

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 Advantages 

  • Broadband operation

  • Low noise performance

  • Omni-directional response

  • Deep water capability

  • Efficient transmitter

  • Robust  

Advantages 

High quality broadband tuning is available with many of these acoustic transducers, as are robust housings incorporating both transducer and tuning. The CTG1253 is just one of a complete range of spherical projector transducers.
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Order Number

CTG1253

Nominal Resonant Frequency

56 kHz

Bandwidth

10 kHz

Transmit Sensitivity

149 dB re 1µPa/V@1m @56kHz

Receive Sensitivity

-196.4 dB re 1V/µPa

Voltage Output

1.5 x10-10 Vrms for 1µPa

Horizontal Beam Pattern

Omni directional ± 1 dB

Capacitance

11 nF

Maximum Input Voltage

1000 Vrms

Maximum Input Power

64 W

Maximum Acoustic Power

189 dB re 1µPa @1m

Dimensions

38 mm diameter

Operating Depth

500 m

Cable/ Connector/ Mounting

3m CS - Specify cable, connector and calibration requirements

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Dual Projector (CTG0615)

This dual projector transducer provides an excellent solution to the problems of working over extreme bandwidths. Both 26kHz and 55kHz spherical projector transducers are enclosed in a compact and manageable package. 

The CTG0615 dual projector transducer provides an excellent solution to the problems of working over extreme bandwidths

A feed from the high frequency projector through the low frequency one allows both to operate from a single cable, without any disruption to the beam pattern. This device is a unique solution to all manner of source needs over an impressive frequency range.  
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Datasheet -  Dual Projector (CTG0615)

Options
Connectors available to customer requirements.

 

Advantages  

  • Extreme bandwidth

  • Low noise performance

  • Omni-directional response 

  • Deep water capability 

  • Single cable

Typical Applications  

  • Acoustic reference standard

  • Solution to all manor of source needs

Order Number

CTG0615

Nominal Resonant Frequency

26 / 55 kHz

Bandwidth

8000 / 8750 Hz

Transmit Sensitivity

149 dB re 1µPa/V@1m @  26 &  55kHz

Receive Sensitivity

-192/-194 dB re 1V/µPa @32kHz/66kHz

Horizontal Beam Pattern

Omni directional± 1 dB

Vertical Beam Pattern

+45/90deg

Capacitance

40 / 9 nF

Maximum Input Power

20 W

Maximum Acoustic Level

184 dB re 1µPa

Dimensions

240 / 76 mm  length/diameter /

Operating Depth

500 m

Cable/ Connector/ Mounting

2m/CS /Threaded
Customer Specify cable, connector & calibration requirements

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Tuned High Power Broadband Projector (CTG811-0259)

The CTG0811-0259 spherical projector is a high performance medium frequency, wideband device. Like the other broadband spherical projectors in the family, this transducer comes complete with an integral tuning network to provide an impressive broad band, high power output performance.

The transducer is supplied with convenient mounting points and a durable polymer finish. Connection is made via a simple bulkhead connector.
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30kHz Broadband Projector (CTG811-0259)

Datasheet -  30kHz Broadband Projector (CTG811-0259)

Typical Applications

  • High power projector

  • Medium frequency wideband projector 

Advantages

  • Broadband operation

  • High power
  • Low noise performance
  • Omni-directional response 

Options

The transducer is one of a family of ‘integral tuning’ projectors with centre frequencies from 8kHz to 150kHz.

Order Number

CTG0811-0259

Nominal Resonant Frequency

30 kHz

Bandwidth

-

Transmit Sensitivity

145 dB re 1µPa/V@1m @ 50kHz

Source Level 

190 

Receive Sensitivity

-189 dB re 1V/µPa @30kHz

Horizontal Beam Pattern

Omni directional ± 1 dB

Vertical Beam Pattern

Omni – Hemi ± 1 dB

Capacitance

-

Maximum Input Voltage

600 Vrms

Maximum Input Power

-

Maximum Acoustic Level

-

Tuning

YES Matching

Dimensions

230/97 mm  length/diameter

Operating Depth

600 m

Cable/ Connector/ Mounting

Subconn LPBH4M
Customer specify cable, connector and calibration requirements

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Tuned High Power Broadband Projector 
(CTG 811-0260)

The CTG0811-0260 is an exceptional wideband projector. The secret to the flat response lies in the integral tuning circuit (mounted in the anodized aluminium housing).

This projector is suitable for a wide range of applications and can be provided with a variety of connector options.

Typical Applications  

  • Acoustic reference standard

  • Wideband projector 

Advantages

  • Broadband operation

  • Low noise performance
  • Omni-directional response 

50-100kHz Broadband Projector (CTG811-0260)

Datasheet -  50-100kHz Broadband Projector (CTG811-0260) 
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Order Number

CTG0811-0260

Nominal Resonant Frequency

-

Bandwidth

- 

Transmit Sensitivity

150 dB re 1µPa/V@1m @ 54 kHz

Source Level 

190 

Receive Sensitivity

-192 dB re 1V/µPa  @93kHz

Useable Frequency Range 

50-100 

Horizontal Beam Pattern

Omni directional ± 1 dB

Vertical Beam Pattern

Omni – Hemi ± 1 dB

Capacitance

-

Maximum Input Voltage

600 Vrms

Maximum Input Power

-

Maximum Acoustic Level

-

Tuning

YES Matching

Dimensions

180/104 mm  length/diameter

Operating Depth

600 m

Cable/ Connector/ Mounting

Subconn LPBH5M
Customer specify cable, connector and calibration requirements

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Tuned High Power Broadband Projector (CTG811-0261) 
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The CTG811-0261 is an exceptionally flat, wideband projector. The secret to the flat response lies in the integral tuning circuit (mounted in the anodised aluminum housing). This projector is suitable for a wide range of applications and can be provided with a variety of connector options.

Typical Applications  

  • Acoustics reference standard

  • Wideband projector

Advantages

  • Flat wideband response

  • Low noise performance

  • Omni-directional response

100-200kHz Broadband Projector (CTG811-0261)

Datasheet - 100-200kHz Broadband Projector (CTG811-0261)

Order Number

CTG0811-0261

Nominal Resonant Frequency