Transducer Product Catalogue

Transcription

1 Transducer Product Catalogue Hydrophones Neptune Sonar Ltd Kelk Lake Kelk, Driffield East Yorkshire United Kingdom YO25 8HG Telephone: +44 () Facsmile: +44 () Website: Projectors Sidescans Echosounders Transponders Communications

2 CATALOGUE INDEX Introduction Introduction to Neptune Sonar Ltd, it s products and facilities. Spherical Hydrophones Industry standards for measuring marine mammal, air gun, boomer and general underwater sound. Miniature Hydrophones Miniature high frequency laboratory standards. Hydrophone with Pre-Amplifier Remote monitoring where higher sensitivities are required. Shock Gauge Page The Company 3 Catalogue Guide 3 World-wide Distributor 3 Open-Water Acoustic Calibration Facility 4 Piezo-Composite Technology 5 6 Frequency Model Page 1 Hz 9 khz D/ Hz 1 khz D/ Hz 17 khz D/ Frequency Model Page 1 Hz 18 khz B/ khz 3 khz D/ Frequency Model Page 35 Hz 11 khz D/7/H Hz 19 khz D/14/H 19 2 Frequency Model Page U/W Explosive shock monitoring. T Spherical Projectors Where high power, omni-directional broad-band signals and wide band noise are required. Low Frequency Transducers Long range, high power sound sources for active sonar and sea-bed penetration. Communication Transducers Toroidal and Hemispherical beam patterns for range tracking, acoustic release systems and transponder/data communication. Frequency Model Page 6 khz 2 khz D/ khz 3 khz D/ khz 4 khz D/ khz 52 khz D/ Frequency Model Page 1 khz 4 khz T khz 6 khz T khz 8.5 khz T khz 8 khz T Frequency Model Page 7 khz 16 khz T khz 19 khz T khz 25 khz T khz 3 khz T khz 3 khz T khz 65 khz T khz 75 khz T khz 75 khz T

3 CATALOGUE INDEX Spherical Projectors Omni-directional, wide-band Projector Transducers with 3dB wide-band matching. Single Beam Transducers These transducers are useful where single directional beam patterns are required. Originally intended for hull mounted echo-sounders many of the designs can be operated at depth in towed bodies. Applications include commercial fishing and navigation. Dual Beam Transducers Dual beam transducers are adaptable to a wide range of seabed depths and target resolutions. Over-side, hull and external mounting are available in a choice of frequencies. Dual Frequency Transducers Available in three housing shapes for over-side, hull or external mounting, these transducer have applications in surveying, geophysical and fish stock assessments. SideScan Tranducers This section features a number of side-scan transducers that are direct replacements for the most popular systems already established in the commercial market. Frequency Model Page (3dB) 9 khz 19 khz D/11/BB (3dB) 11 khz 26 khz D/17/BB (3dB) 21 khz 44 khz D/26/BB 59 6 Frequency Model Page 16, 2, 21, 3, 6 khz 142 Series , 28, 3, 33, 38, 5 khz 147 Series , 28, 3, 33, 38, 5 khz 172 Series , 28,3, 33, 38, 5 khz 32 Series , 2, 21, 3, 6 khz 39 Series , 28, 3, 33, 38, 5 khz 395 Series khz T Frequency Model Page 24, 28, 3, 33, 38 khz 153 Series khz T khz T khz T khz T Frequency Model Page 33 & 21 khz T & 21 khz T & 2 khz T , 28,3, 33, 38, 5 khz 16, 2, 21, 3, 6 khz 24, 28,3, 33, 38, 5 khz 16, 2, 21, 3, 6 khz 24, 28,3, 33, 38, 5 khz 16, 2, 21, 3, 6 khz Frequency 76 Series Series Series Model Page 1 / 4 khz T / 1 khz T khz T / 5 khz T khz T khz T khz T khz T

4 Introduction The Company A leading company in underwater transducer technology, Neptune Sonar offers one of the world s largest and most comprehensive range of Undersea Defence and Commercial transducers. Specified by many of the leading OEM companies our transducers feature in a wide range of commercial equipment, ranging from Echo Sounders and Side Scan Sonar to Sea Floor Mapping and Positioning Systems. Neptune's military transducers have been supplied to Navies and Defence Establishments around the world and are key components in Intercept, L/F Active, Submarine Tracking and Communication Systems. Based in the UK our main research and manufacturing operation is located on a 25-acre site in East Yorkshire. With a 6, 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. As an ISO91 company the on site calibration facility ensures that our production transducers are supplied to the highest quality standards using a monitored programme of free-field acoustic testing on a continuous basis. Catalogue Guide For further information please contact: Neptune Sonar Ltd Tel: +44 () info@neptune-sonar.co.uk This catalogue provides technical specifications for a selection of popular transducers from Neptune s range of over 1 different designs. The catalogue is arranged in sections with the transducers grouped by their normal application. The header on each page carries the description of the application and the transducer model number. Where transducers are described as a Series they are available in a choice of different frequency options. The index pages 1 and 2 are sub-divided into the different applications and lists the usual frequency range against the model. World-wide Distributor GSE Rentals have been appointed as our world wide distributor for the most popular transducers in the Neptune range. They will maintain stocks of these popular models and will be able to offer a rapid "off-the-shelf" service. Customers should refer to the individual data sheets to identify the transducer models currently stocked. Alternatively they may request GSE to extend their stock range to include additional types. GSE Rentals Ltd, Aberdeen Tel: +44 () Fax: +44 () E Mail: info@gserentals.co.uk 3

5 Open-Water Acoustic Calibration Facility The largest privately owned acoustic calibration laboratory of its type in the UK it is equipped with the most technically advanced instrumentation and software designed to provide engineers and scientists with the capability of performing accurate underwater acoustic measurements on a wide range of underwater equipment. Manufacturers and end-users alike will find the facility invaluable whether calibrating a single hydrophone or establishing the underwater performance of a complex sonar system. The measurement laboratory is constructed on a Floating platform 17 by 1 metres and connected to the shore by a 4 metre long by 2 metre wide gang-way. The ease of access provided by this walkway offers significant benefits over the use of boats, simplifying the movement and deployment of heavy equipment and reducing health and safety risks. The calibration laboratory has a fully automated test equipment design for measuring: Complex Impedance Beam Patterns Transmit Sensitivity Receive Sensitivity Source Levels Phase For further information please contact: Neptune Sonar Ltd Tel: +44 () info@neptune-sonar.co.uk The Laboratory includes: Fully traceable to national standards. Range of reference hydrophones and projectors. Average water depth 1m. Moon pool size 4.9 x 2.3 metres. Cranes and handling equipment. Laboratory and storage area. Shore based support facilities. Power supply 2 amp 3 phase 5Hz supply. Quiet rural location. Submersible GRP acoustic pressure vessel. Wide choice of local accommodation. 4

6 Piezo-Composite Technology Neptune Sonar have a long history of producing reliable and cost effective transducer designs and now offer increased design flexibility with the addition of piezo-composite technology to our existing manufacturing capabilities. Piezo-composite is a modified form of standard PZT where diced ceramic pillars are encapsulated into a polymer matrix to form a homogenised acoustic material with adjustable properties. These materials are inherently broadband with good sensitivity and acoustic coupling efficiencies. The unique properties of composites offer greater range in transducer performance and can be readily formed into 3 dimensional shapes. Neptune Sonar uses the dice and fill technique in the manufacture of composite ceramic. This provides the ability to optimise ceramic geometry to best suit the application. Curved Arrays Spherical Projectors Linear Arrays Geometry Shading APPLICATIONS: Broadband Hydrophones Efficient Broadband Transmitters Multi-Beam Transmit and Receive Arrays Mine-hunting Sea Floor Mapping ROV Scanning Arrays Acoustic Communications 5

7 Piezo-Composite Technology Dicing Amplitude Gain The accumulation of lateral displacement within solid ceramic (d31) restricts the amplitude in the thickness mode (d33). Conversely in 1-3 composite the relatively small lateral displacements can to be taken up within the compliant polymer matrix surrounding each pillar. Hence there is more displacement energy available in the thickness mode. d 33 d 33 Filling d 31 Monolithic Composite Sensitivity Gain By reducing the area of ceramic for a given aperture (volume fraction) it is possible to increase the strain energy within each pillar compared to its solid ceramic counterpart. The less ceramic and the more compliant the matrix material is, more strain energy is exerted on the pillars. Gains in excess of 5dB are not uncommon. Grinding Transmission Efficiency Gain Due to the reduction in ceramic content within the composite the resultant acoustic impedance is more closely matched to that of water at 1.5 Mrayl. Hence there are less internal reflection losses than in solid ceramic (assuming no matching layers). Monolithic Composite Acoustic Impedance 25 Mrayls 6.5 Mrayls Coupling Coefficient (Kt) Electroding - + Forming Transducer Characteristic Comparison Unwanted frequency modes can be reduced to near zero values in composites by the internal damping properties of the polymer matrix. The multiple resonant frequencies that are normally seen in monolithic ceramic require electrical and or acoustic filtering to achieve equivalent performances. For linear and curved phased arrays, particularly, there are advantages that can be gained to offset the additional manufacturing costs of composite. Principally, there is improved electro-acoustic uniformity with less crosstalk between channels and a reduction in the number of individual components per transducer array. Advantages Uni-modal frequency response across operational band Design simplicity Frequency independent stave geometry Aperture design flexibility Improved curved array performance Smooth radius of curvature High sensitivity / high pulse amplitude Good signal to noise ratio Broad bandwidth Q = 4 to 5 (typical) Increased range resolution Short pulse lengths possible Improved phase uniformity at resonance Good angular resolution Improved coupling efficiency Good acoustic match to water Readily formed into 3 dimensional shapes eg Cylindrical and spherical Disadvantages Reduction in capacitance Percentage loss of ceramic area Higher manufacturing costs More processing required Thermally insulating Power and duty cycle limited Performance compromises at higher depth rating Material compliance issues 6

8 Spherical Transducers MODEL D/6 OMNI-DIRECTIONAL RESPONSE LOW NOISE PERFORMANCE ACOUSTIC REFERENCE STANDARD BROADBAND OPERATION AIR GUN & BOOMER MONITOR MARINE MAMMAL AUDIO SENSOR The D/6 transducer offers a combination of broadband frequency response, omni-directional beam pattern and high sensitivity. A versatile transducer with a wide range of transmitting and receiving applications the D/6 is equally at home as a cost effective, general purpose hydrophone or as a precision, acoustic sensor in a scientific measurement system. The all moulded construction coupled with the inherent strength of the PZT ceramic sphere achieves a lightweight, corrosion free and extremely robust design making it the ideal choice as a monitor hydrophone for air gun, boomer and other harsh environments where high levels of shock are experienced. Electrical connection to the transducer is by a low noise coaxial cable. The outer jacket of the cable is in an extruded polyurethane material, that easily facilitates the potting of the transducer into underwater equipment pods or connectors. The D/6 is available with or without acoustic calibration. All calibrations are traceable to National Standards ø 42ø 1ø 14ø R15 All dimensions in mm 7

9 MODEL D/6 Spherical Transducers Technical Specification Resonant Frequency Beam Pattern Receive Sensitivity Transmit Sensitivity Capacitance at 1 khz Input Power Operating Depth 6 khz (Nominal) Omni ± 1 db up to 7 khz See Graph See Graph 98 pf 225 Watts around resonance 15 Metres Operating Temperature -5 to +4 ºC Storage Temperature -4 to +8 ºC Cable Type Cable Length Polyurethane Ø6mm Low Noise Coaxial 1 metres standard Additional lengths supplied to order Receive Graph Admittance Plot db re 1V/uPa Conductance ms Susceptance ms Transmit Graph Beam Pattern at 6 khz db re 1uPa/V at 1m dB Divisions Data illustrated is taken from actual in-water measurements 8

10 Spherical Transducers MODEL D/7 OMNI-DIRECTIONAL RESPONSE LOW NOISE PERFORMANCE ACOUSTIC REFERENCE STANDARD BROADBAND OPERATION AIR GUN & BOOMER MONITOR MARINE MAMMAL AUDIO SENSOR With a combination of broadband frequency response, omni-directional beam pattern and high sensitivity the D/7 has become the most popular hydrophones in the Neptune range of "D" type spherical transducers. The all moulded construction and inherent strength of the PZT ceramic sphere achieves a robust, light weight, corrosion free design making it the ideal choice as a monitor hydrophone for air gun, boomer and other environments where high levels of shock are experienced. Electrical connection to the transducer is by a low noise coaxial cable. The extruded polyurethane outer jacket of the cable enables the design engineer to build the transducer into customised equipment packages and readily obtain a waterproof seal by simple moulding techniques. The D/7 is available with or without acoustic calibration. All calibrations are traceable to National Standards. This product is stocked by our world-wide distributor GSE Rentals Ltd, Aberdeen Tel: +44 () Fax: +44 () E Mail: info@gserentals.co.uk ø 34ø 1ø 13ø R1 All dimensions in mm 9

11 MODEL D/7 Spherical Transducers Technical Specification Resonant Frequency Beam Pattern Receive Sensitivity Transmit Sensitivity Capacitance at 1 khz Input Power Operating Depth 7 khz (Nominal) Omni ± 1 db up to 8 khz See Graph See Graph 93 pf 19 Watts around resonance 15 Metres Operating Temperature -5 to +4 ºC Storage Temperature -4 to +8 ºC Cable Type Cable Length Polyurethane Ø6mm Low Noise Coaxial 1 metres standard Additional lengths supplied to order Receive Graph Admittance Plot db re 1V/uPa Conductance ms Susceptance ms Transmit Graph Beam Pattern at 7 khz db re 1uPa/V at 1m dB Divisions Data illustrated is taken from actual in-water measurements 1

12 Hydrophone with Pre-Amplifier MODEL D/14/H INTEGRAL PRE-AMPLIFIER OMNI-DIRECTIONAL RESPONSE LOW NOISE PERFORMANCE BROADBAND OPERATION MARINE MAMMAL AUDIO SENSOR MAXIMUM CABLE LENGTH 5 MTS The D/14/H is a true spherical balanced element combined with a low noise differential pre-amplifier with gain options of 2, 3 and 4dB. The hydrophone is moulded in polyurethane. Two of the cores are used for supplying the 24 volt power with the other screened pair providing the differential output signal. The proximity of the amplifier to the hydrophone element allows the signals to be transmitted along long lengths of cable (up to 5 metres) without suffering any degradation. The differential output also improves the signal to noise ratio and extends the upper frequency cut-off. The gain of the amplifier can be adjusted to suit customers requirements with an additional 2dB from the optional Surface Receiver Unit which can be supplied separately. All dimensions in mm 11

13 MODEL D/14/H Hydrophone with Pre-Amplifier Technical Specification Resonant Frequency Usable Frequency Range Beam Pattern Receive Sensitivity Pre-Amplifier Gain (Pre-Set) Power Supply Signal Output Operating Depth 1 Hz to 19 khz Omni ± 2 db up to 18 khz See Graph 2, 3 or 4dB 12 to 28 Volts <1mA Differential 15 Metres Operating Temperature -5 to +4 ºC Storage Temperature -4 to +8 ºC Cable Type Cable Length Optional: Surface Receiver Unit 15 khz (Nominal) Polyurethane Outer Sheath Power 2 Cores Signal Twisted Screened Pair 1 metres standard Additional lengths supplied to order Input (Differential - Hydrophone) Output (Single Ended) Power Supply Input Gain Switch - db or additional 2dB Receive Graph with 2dB Gain -15 Beam Pattern at 15 khz db re 1V/uPa dB Divisions Data illustrated is taken from actual in-water measure- 12

14 Miniature Hydrophones MODEL B/2 WIDE BAND RESPONSE LOW NOISE PERFORMANCE ACOUSTIC REFERENCE STANDARD OMNI BEAM PATTERN HIGH PERFORMANCE DOUBLE-SCREENED CABLE The B/2 miniature hydrophone has been designed by Neptune to achieve the optimum combination of frequency, physical size and receive sensitivity. This has resulted in a hydrophone with a wide variety of applications ranging from marine mammal sound studies to the analysis of near field pressure patterns. The elimination of metal components from the construction prevents corrosion and reduces of the sound field distortion and scattering. With its all-moulded construction, the B/2 is completely waterproof down to a depth of 7 metres. Electrical connection is by a double screened, low noise coaxial cable with a polyurethane outer sheath. The versatility of the B/2 is further enhanced by selecting materials for the hydrophone stalk and outer cable sheath that enable the hydrophone to be bonded or moulded directly into waterproof housings. The B/2 is available as a calibrated or un-calibrated device with all calibrations traceable to National Standards. Acoustic Centre 9.ø 7.ø 4ø All dimensions in mm 13

15 MODEL B/2 Miniature Hydrophones Technical Specification Resonant Frequency Beam Pattern Circumferential Beam Pattern Horizontal 27 khz (Nominal) Omni ± 2 db at 1kHz 27º ± 3 db at 1kHz Receive Sensitivity Transmit Sensitivity Capacitance at 1 khz Operating Depth See Graph See Graph 38 pf 7 Metres Operating Temperature -5 to +4 ºC Storage Temperature -4 to +8 ºC Cable Type Cable Length Polyurethane Ø4mm Double Screened Low Noise Coaxial 1 metres standard Additional lengths supplied to order Receive Graph Admittance Plot db re 1V/uPa Conductance ms Susceptance ms Transmit Graph Beam Pattern at 1 khz db re 1uPa/V at 1m dB Divisions Data illustrated is taken from actual in-water measurements 14

16 Miniature Hydrophones MODEL D/3 TRUE SPHERICAL RESPONSE LOW NOISE PERFORMANCE ACOUSTIC REFERENCE STANDARD HIGH PERFORMANCE RESPONSE UP TO 4 khz DOUBLE-SCREENED CABLE The D/3 miniature high frequency hydrophone is a versatile acoustic sensor with a wide range of underwater sound applications ranging from near field monitor systems to high frequency calibration. Available with or without a certified acoustic calibration the single piezo - ceramic element retains an excellent spherical beam pattern up to 35 khz. The robust construction of the D/3 enables it to operate at depths down to 7 metres. The sensor element is encapsulated in a tough polyurethane envelope moulded directly onto the cable. This construction achieves accurate alignment of the acoustic centre whilst providing good vibration isolation between the element and the mounting stalk. Electrical connection is by a double screened, low noise coaxial cable with a polyurethane outer sheath. The D/3 is available as a calibrated or un-calibrated device with all calibrations traceable to National Standards. Acoustic Centre 9.ø 7.ø 4ø All dimensions in mm 15

17 MODEL D/3 Miniature Hydrophones Technical Specification Resonant Frequency Beam Pattern Circumferential Beam Pattern Horizontal 3 khz (Nominal) Omni ± 2 db at 15kHz 27º ± 3 db at 15kHz Receive Sensitivity See Graph Transmit Sensitivity See Graph Capacitance at 1 khz 28 pf Operating Depth 7 Metres Operating Temperature -5 to +4 ºC Storage Temperature -4 to +8 ºC Cable Type Polyurethane Ø4mm Double Screened Low Noise Coaxial Cable Length 1 metres standard Additional lengths supplied to order Receive Graph Admittance Plot db re 1V/uPa Conductance ms Susceptance ms Transmit Graph Beam Pattern at 3 khz db re 1uPa/V at 1m dB Divisions Data illustrated is taken from actual in-water measurements 16

18 Hydrophone with Pre-Amplifier MODEL D/7/H INTEGRAL PRE-AMPLIFIER OMNI-DIRECTIONAL RESPONSE LOW NOISE PERFORMANCE BROADBAND OPERATION MARINE MAMMAL AUDIO SENSOR MAXIMUM CABLE LENGTH 5 MTS The D/7/H is a true spherical balanced element combined with a low noise differential pre-amplifier with gain options of 2, 3 and 4dB. The hydrophone is moulded in polyurethane. Two of the cores are used for supplying the 24 volt power with the other screened pair providing the differential output signal. The proximity of the amplifier to the hydrophone element allows the signals to be transmitted along long lengths of cable (up to 5 metres) without suffering any degradation. The differential output also improves the signal to noise ratio and extends the upper frequency cut-off. The gain of the amplifier can be adjusted to suit customers requirements with an additional 2dB from the optional Surface Receiver Unit which can be supplied separately. All dimensions in mm 17

19 MODEL D/7/H Hydrophone with Pre-Amplifier Technical Specification Resonant Frequency Usable Frequency Range Beam Pattern Receive Sensitivity Pre-Amplifier Gain (Pre-Set) Power Supply Signal Output Operating Depth 5 Hz to 12 khz Omni ± 2 db up to 1 khz See Graph 2, 3 or 4 db 12 to 28 Volts <1mA Differential 15 Metres Operating Temperature -5 to +4 ºC Storage Temperature -4 to +8 ºC Cable Type Cable Length Optional: Surface Receiver Unit 7 khz (Nominal) Polyurethane Outer Sheath Power 2 Cores Signal Twisted Screened Pair 1 metres standard Additional lengths supplied to order Input (Differential - Hydrophone) Output (Single Ended) Power Supply Input Gain Switch - db or additional 2dB Receive Graph with 2dB Gain -15 Beam Pattern at 7 khz db re 1V/uPa dB Divisions Data illustrated is taken from actual in-water measurements 18

20 Hydrophone with Pre-Amplifier MODEL D/14/H INTEGRAL PRE-AMPLIFIER OMNI-DIRECTIONAL RESPONSE LOW NOISE PERFORMANCE BROADBAND OPERATION MARINE MAMMAL AUDIO SENSOR MAXIMUM CABLE LENGTH 5 MTS The D/14/H is a true spherical balanced differential element combined with a low noise signal Differential conditioning amplifier with gain options of 2, 3 and 4dB. The hydrophone is moulded in polyurethane. Two of the cores are used for supplying the 24 volt power with the other screened pair providing the differential output signal. The proximity of the amplifier to the hydrophone element allows the signals to be transmitted along long lengths of cable (up to 5 metres) without suffering any degradation. The differential output also improves the signal to noise ratio and extends the upper frequency cut-off. The gain of the amplifier can be adjusted to suit customers requirements with an additional 2dB from the optional Surface Receiver Unit which can be supplied separately. All dimensions in mm 19

21 MODEL D/14/H Hydrophone with Pre-Amplifier Technical Specification Resonant Frequency Usable Frequency Range Beam Pattern Receive Sensitivity Pre-Amplifier Gain (Pre-Set) Power Supply Signal Output Operating Depth 1 Hz to 19 khz Omni ± 2 db up to 18 khz See Graph 2, 3 or 4dB 24 Volts <1mA Differential 15 Metres Operating Temperature -5 to +4 ºC Storage Temperature -4 to +8 ºC Cable Type Cable Length Optional: Surface Receiver Unit 15 khz (Nominal) Polyurethane Outer Sheath Power 2 Cores Signal Twisted Screened Pair 1 metres standard Additional lengths supplied to order Input (Differential - Hydrophone) Output (Single Ended) Power Supply Input Gain Switch - db or additional 2dB Receive Graph with 2dB Gain -15 Beam Pattern at 15 khz db re 1V/uPa dB Divisions Data illustrated is taken from actual in-water measure- 2

22 Shock Gauge Transducer MODEL T11 STANDARD USED FOR UK MOD FAST TRANSIENT RESPONSE REFERENCE STANDARD HIGH OPERATIONAL ENDURANCE LOW COST The T11 is a miniature transducer designed to measure underwater explosive shock levels and pressure transients in fluids. Used by defence organisations throughout the world, it has become the standard reference hydrophone for the UK Ministry of Defence test ranges. The hydrophone is based upon a piezoelectric tourmaline crystal connected to a miniature low noise coaxial cable. The crystal and a small length of cable are coated in a special waterproof compound designed to provide a high level of insulation and a fast transient response. With a rise time of less than 4µsec and a dynamic pressure range of -275 MPa this transducer is intended to measure pressure levels and profiles from underwater explosions. A 15mm diameter underwater compression fitting is provided to seal the cable into the customer s instrumentation housing. Certified transducer calibration based upon a dead-weight tester can be provided on request. Rubber Sleeve ø 9 Gauge Head Sealing Arrangement Identification Sleeve Connector All dimensions in mm 21

23 MODEL T11 Shock Gauge Transducer Technical Specification Measurement Pressure Range Nominal Charge Sensitivity Insulation Resistance 275 Mpa 4, psi.7 pc / Kpa.5 pc / psi 1 5 M Ohms Connector Type Microdot 1/32 Cable Type Cable Length Operating Temperature to +5 ºC Miniature, Low Noise Coaxial Storage Temperature -2 to +8 ºC 3 metres standard Additional lengths supplied to order Data illustrated is taken from actual in-water measurements 22

24 Spherical Projectors MODEL D/11 OMNI-DIRECTIONAL RESPONSE EFFICIENT TRANSMITTER OCTAVE BANDWIDTH OPTION BROADBAND OPERATION HIGH POWER PROJECTOR DEEP WATER CAPABILITY The D/11 spherical transducer provides highly efficient, omni-directional receive and transmit beam patterns. With a resonant frequency of 11 khz and a useful operating bandwidth from 6 khz to 2kHz the design is particularly suitable as a broadband noise source or for long range voice and data communications systems. The transducer is extremely robust and able to withstand severe levels of underwater explosive shock. Electrical connection to the transducer is by a twisted pair screened cable. The outer jacket of the cable is extruded polyurethane that enables the transducer to be built into customised equipment packages and readily obtain a waterproof design by simple moulding techniques. The D/11 is available with or without acoustic calibration. All calibrations are traceable to National Standards. Wideband Version A broadband version of this transducer is available (see page 55 & 56 Model D/11/BB). Utilising an internal passive matching network to achieve a 3dB bandwidth from 8 khz to 19 khz. 25ø 45ø 12ø 165ø All dimensions in mm 23

25 MODEL D/11 Spherical Projectors Technical Specification Resonant Frequency Beam Pattern Receive Sensitivity Transmit Sensitivity Capacitance at 1 khz Input Power Operating Depth 11 khz (Nominal) Omni ± 1 db up to 18 khz See Graph See Graph 86, pf 3 Watts around resonance 2 Metres Operating Temperature -5 to +4 ºC Storage Temperature -4 to +8 ºC Cable Type Cable Length Polyurethane Ø12mm 2 Core Screened 1 metres standard Additional lengths supplied to order Receive Graph Admittance Plot db re 1V/uPa Conductance ms Susceptance ms Transmit Graph Beam Pattern at 11 khz db re 1uPa/V at 1m dB Divisions Data illustrated is taken from actual in-water measurements 24

26 Spherical Projectors MODEL D/17 OMNI-DIRECTIONAL RESPONSE EFFICIENT TRANSMITTER OCTAVE BANDWIDTH OPTION BROADBAND OPERATION HIGH POWER PROJECTOR DEEP WATER CAPABILITY The D/17 spherical transducer is a versatile design providing an omni-directional transmit and receive beam pattern. With a useful operating bandwidth from 1 khz to 3 khz and capable of achieving source levels of 21dB around resonance it is particularly suitable as a high power noise source or communications transducer. The transducer is extremely robust and able to withstand severe levels of underwater explosive shock. Electrical connection to the transducer is by a screened twisted pair cable. The outer jacket of the cable is a tough polyurethane material that enables the transducer to be moulded directly into underwater equipment pods or connectors. As with all Neptune transducers, the D/17 is available with the option of a full acoustic calibration. All calibrations are traceable to National Standards. Wideband Version A broadband version of this transducer is available (see page 57 & 58 Model D/17/BB). Utilising an internal passive matching network to achieve a 3dB bandwidth from 11 khz to 26 khz. 2ø 35ø 12ø 11ø All dimensions in mm 25

27 MODEL D/17 Spherical Projectors Technical Specification Resonant Frequency Beam Pattern Receive Sensitivity Transmit Sensitivity Capacitance at 1 khz Input Power Operating Depth 17 khz (Nominal) Omni ± 1 db up to 3 khz See Graph See Graph 6, pf 2 Watts around resonance 2 Metres Operating Temperature -5 to +4 ºC Storage Temperature -4 to +8 ºC Cable Type Cable Length Polyurethane Ø12mm 2 Core Screened 1 metres standard Additional lengths supplied to order Receive Graph Admittance Plot db re 1V/uPa Conductance ms Susceptance ms Transmit Graph Beam Pattern at 17 khz db re 1uPa/V at 1m dB Divisions Data illustrated is taken from actual in-water measurements 26

28 Spherical Projectors MODEL D/26 OMNI-DIRECTIONAL RESPONSE HIGH POWER PROJECTOR EFFICIENT TRANSMITTER BROADBAND OPERATION OCTAVE BANDWIDTH OPTION DEEP WATER CAPABILITY The D/26 spherical transducer is a versatile design providing omni-directional transmit and receive characteristics over a frequency band of 2 khz to 4 khz. The all 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. Electrical connection to the transducer is by a screened twisted pair cable with an extruded polyurethane outer jacket. This enables the systems engineer to configure the transducer directly into customised equipment packages using simple moulding techniques. The D/26 is available with or without acoustic calibration. All calibrations are traceable to National Standards. Wideband Version A broadband version of this transducer is available (see page 59 & 6 Model D/26/BB). Utilising an internal passive matching network to achieve a 3dB bandwidth from 21 khz to 44 khz. 2ø 32ø 7ø All dimensions in mm 27

29 MODEL D/26 Spherical Projectors Technical Specification Resonant Frequency Beam Pattern Receive Sensitivity Transmit Sensitivity Capacitance at 1 khz Input Power Operating Depth 26 khz (Nominal) Omni ± 1 db up to 35 khz See Graph See Graph 42, pf 85 Watts around resonance 2 Metres Operating Temperature -5 to +4 ºC Storage Temperature -4 to +8 ºC Cable Type Cable Length Polyurethane Ø12mm 2 Core Screened 1 metres standard Additional lengths supplied to order Receive Graph Admittance Plot db re 1V/uPa Conductance ms Susceptance ms Transmit Graph Beam Pattern at 26 khz db re 1uPa/V at 1m dB Divisions Data illustrated is taken from actual in-water measurements 28

30 Spherical Projectors MODEL D/45 OMNI-DIRECTIONAL RESPONSE HIGH POWER PROJECTOR EFFICIENT TRANSMITTER BROADBAND OPERATION DEEP WATER CAPABILITY The D/45 spherical transducer is a versatile design providing omni-directional transmit and receive characteristics over a wide frequency range. The all 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. Electrical connection to the transducer is by a screened twisted pair cable with an extruded polyurethane outer jacket. This enables the systems engineer to configure the transducer directly into customised equipment packages using simple moulding techniques. The D/45 is available with or without acoustic calibration. All calibrations are traceable to National Standards. All dimensions in mm 29

31 MODEL D/45 Spherical Projectors Technical Specification Resonant Frequency Beam Pattern Receive Sensitivity Transmit Sensitivity Capacitance at 1 khz Input Power Operating Depth 45 khz (Nominal) Omni ± 1 db up to 55 khz See Graph See Graph 22, pf 725 Watts around resonance 2 Metres Operating Temperature -5 to +4 ºC Storage Temperature -4 to +8 ºC Cable Type Cable Length Polyurethane Ø9mm Twin Screened 1 metres standard Additional lengths supplied to order Receive Graph -15 Admittance Plot 7 8 db re 1V/uPa Conductance ms Susceptance ms Transmit Graph Beam Pattern at 45 khz db re 1uPa/V at 1m dB Divisions Data illustrated is taken from actual in-water measurements 3

32 Low Frequency Projectors MODEL T KHZ FREE FLOODED RING BROADBAND HIGH POWER OMNI-DIRECTIONAL BEAM PATTERN UNLIMITED DEPTH LONG RANGE TRANSMISSION The T161 is one of a new range of high power, low frequency transducers recently developed by Neptune Sonar. Based upon the standard Free Flooded Ring (FFR) concept, the transducer utilises the latest technology to achieve a highly efficient projector capable of operating down to full ocean depth. FFR transducers can be configured to produce different beam patterns and output powers. 432ø 115 Mounting in 6 places M1 x 3 equi-spaced on a 39 P.C.D All dimensions in mm 31

33 MODEL T161 Low Frequency Projectors Technical Specification Resonant Frequency Operating Band Transmit Sensitivity Horizontal Beam Pattern Vertical Beam Pattern Input Power Max Operating Depth Cable Length Cable Type 1.8 khz 1 khz to 4 khz See Graph Omni ± 2 db up to 4 khz Toroidal (See Graphs) 2 1% Duty Cycle Unlimited 3 Metres (Additional lengths supplied to order) Polyurathane Ø6mm Single Conductors Storage Temperature -4 to +8 ºC Operating Temperature -5 to +7 ºC Admittance Plot Conductance ms Susceptance ms Transmit Graph Beam Pattern Vertical at 2 khz db re 1uPa/V at 1m dB Divisions Data illustrated is taken from actual in-water measurements 32

34 Low Frequency Projectors MODEL T16 3 KHZ FREE FLOODED RING BROADBAND HIGH POWER OMNI-DIRECTIONAL BEAM PATTERN UNLIMITED DEPTH LONG RANGE TRANSMISSION The T16 is one of a new range of high power, low frequency transducers recently developed by Neptune Sonar. Based upon the standard Free Flooded Ring (FFR) concept, the transducer utilises the latest technology to achieve a highly efficient projector capable of operating down to full ocean depth. FFR transducers can be configured to produce different beam patterns and output powers. 16 Mounting in 6 places M8 x 24 equi-spaced on a 2 P.C.D. 235ø All dimensions in mm 33

35 MODEL T16 Low Frequency Projectors Technical Specification Resonant Frequency Operating Band Transmit Sensitivity Horizontal Beam Pattern Vertical Beam Pattern Input Power Max Operating Depth Cable Length Cable Type 2.5 khz 2 khz to 8 khz See Graph Omni ± 2 db up to 6 khz Toroidal (See Graphs) 2 1% Duty Cycle Unlimited Storage Temperature -4 to +8 ºC Operating Temperature -5 to +7 ºC 3 Metres (Additional lengths supplied to order) Polyurathane Ø6mm Single Conductors Receive Graph Admittance Plot db re 1V/uPa Conductance ms Susceptance ms Transmit Graph Beam Pattern Vertical at 3 khz db re 1uPa/V at 1m dB Divisions Data illustrated is taken from actual in-water measurements 34

36 Low Frequency Projectors MODEL T17 4 KHZ FREE FLOODED RING BROADBAND HIGH POWER OMNI-DIRECTIONAL BEAM PATTERN UNLIMITED DEPTH LONG RANGE TRANSMISSION The T17 is one of a range of Free Flooding Ring transducers recently introduced by Neptune. Utilising the latest ceramic technology the FFR concept is ideally suited for high power, broadband, low frequency sound generation. Another advantage of the design is its ability to operate down to full ocean depth at maximum efficiency. FFR transducers can be configured to produce different beam patterns and are available in a range of frequencies. 16 Mounting in 6 places M6 x 2 equi-spaced on a 158 P.C.D. 191ø All dimensions in mm 35

37 MODEL T17 Low Frequency Projectors Technical Specification Resonant Frequency Operating Band Transmit Sensitivity Horizontal Beam Pattern Vertical Beam Pattern Input Power Max Operating Depth Cable Length Cable Type 4 khz 3 khz to 9.5 khz See Graph Omni ± 2 db up to 9 khz Toroidal (See Graphs) 15 1% Duty Cycle Unlimited Storage Temperature -4 to +8 ºC Operating Temperature -5 to +7 ºC 3 Metres (Additional lengths supplied to order) Polyurathane Ø6mm Single Conductors Receive Graph Admittance Plot db re 1V/uPa Conductance ms Susceptance ms Transmit Graph Beam Pattern Vertical at 4 khz db re 1uPa/V at 1m dB Divisions Data illustrated is taken from actual in-water measurements 36

38 Low Frequency Transducers MODEL T KHZ BROADBAND PROJECTOR HIGH POWER DIRECTIONAL BEAM PATTERN HIGH PERFORMANCE LONG RANGE TRANSMISSION LOW COST The T335 is a single piston transducer offering a high power, broad band performance at an affordable price. With a nominal operating frequency range from 2 khz to 8 khz transducers can be configured to form half lambda spaced arrays. The robust design is tolerant of both dynamic and static pressure making it particularly suitable for Military applications. The T335 is fitted with a standard internal tuning network to achieve the transmit response Illustrated overleaf. Alternative tuning arrangements providing different responses can be fitted upon request. The standard connector is an in-line Subconn type IL2M, alternative connectors are available. All dimensions in mm 37

39 MODEL T335 Low Frequency Projectors Technical Specification Resonant Frequency 3. khz Useful Frequency Band 2 khz to 8 khz Beam Pattern 9 Degrees Nominal Impedance 22 Ohms Input Power Max 75 Watts Receive Sensitivity See Graph Transmit Sensitivity See Graph Operating Depth 6 Metres Cable / Connector Type Sub-Conn IL2 M Cable Length 2mm Standard Operating Temperature -5 to +4 ºC Storage Temperature -4 to +8 ºC Receive Graph Admittance Plot Receive Sensitivity (db re 1V/uPa) Frequency (khz) Conductance (ms) Frequency (khz) Susceptance (ms) Transmit Graph Beam Pattern at 3 khz Vertical Transmit Sensivity (db re 1uPa/V at 1m) Transmit Sensivity (db re 1uPa/V at 1m) Frequency (khz) Frequency (khz) -9 5dB Divisions 9 Data illustrated is taken from actual in-water measurements 38

40 Communication Transducers MODEL T313 HEMISPHERICAL BEAM PATTERN BROADBAND OPERATION HIGH PERFORMANCE LONG RANGE TRANSMISSION LOW COST Designed for use in transponder beacons, data communication, acoustic release mechanisms and long range base line systems, the T313 is a versatile transducer combining broad-band transmission and reception over a hemispherical beam pattern. Over-moulded design onto an anodised aluminium base is lightweight and mechanically robust. All dimensions in mm 39

41 MODEL T313 Communication Transducers Technical Specification Resonant Frequency Useful Frequency Band Vertical Beam Pattern 8. / 13. khz 7 khz to 16 khz Hemispherical Horizontal Beam Pattern Input Power Max Operating Depth Connection Type Cable Type Cable Length Omni ± 2 db up to 16 khz 38 Watts Unlimited Operating Temperature -5 to +4 ºC Storage Temperature -4 to +8 ºC Cable/Pentrator or (Optional metal to glass contacts pins) Polyurethane Ø7mm 2 Core Screened 3 Metres Standard Additional Lengths supplied to order Receive Graph Admittance Plot db re 1V/uPa Conductance ms Susceptance ms db re 1uPa/V at 1m Transmit Graph Beam Pattern at 12 khz -9 5dB Divisions 9 Data illustrated is taken from actual in-water measurements 4

42 Communication Transducers MODEL T279 HEMISPHERICAL BEAM PATTERN BROAD BAND TRANSMISSION DEEP WATER CAPABILITY TRANSPONDER RANGE TRACKING COMMUNICATIONS The T279 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 T279 combines efficient broadband transmission and reception with an almost hemispherical beam pattern. The all moulded construction achieves a design that is compact and robust. All dimensions in mm 41

43 MODEL T279 Communication Transducers Technical Specification Resonant Frequency Useful Frequency Band Horizontal Beam Pattern Vertical Beam Pattern Impedance at Resonance Input Power Max Operating Depth Base Material Cable Type Cable Length 15 khz (Nominal) 12 khz to 19 khz Omni ± 2 db up to 2 khz Hemispherical 32 Ohms 15 Watts pulsed 6 Metres Storage Temperature -4 to +8 ºC Operating Temperature -5 to +7 ºC Anodised Aluminium or 316L Stainless Steel Polyurethane Ø9mm 2 Core Screened 3 Metres Standard Additional lengths supplied to order Receive Graph Admittance Plot db re 1V/uPa Conductance ms Susceptance ms Transmit Graph Beam Pattern Vertical at 15 khz db re 1uPa/V at 1m dB Divisions Data illustrated is taken from actual in-water measurements 42

44 Communication Transducers MODEL T KHZ CYLINDRICAL TRANSDUCER BROAD BAND TRANSMISSION TRANSPONDER RANGE TRACKING COMMUNICATIONS The Type T235 is one of a series of underwater transducers available from Neptune that are designed for use in transponders, beacons, acoustic release mechanisms and data communication systems. This versatile transducer combines efficient broad band transmission and reception suited to submarine range tracking applications on underwater trials ranges. This transducer has also been successfully selected for a recent system development for a mammal acoustic deterrent device. The nylon base incorporates threaded fastenings and an 'O' ring seal allowing simple and direct mounting onto equipment or pressure housings. Electrical connection is via a twisted screen pair cable. All dimensions in mm 43

45 MODEL T235 Communication Transducers Technical Specification Resonant Frequency Useful Frequency Band Horizontal Beam Pattern Vertical Beam Pattern Impedance at Resonance Input Power Max Operating Depth Base Material Cable Type Cable Length 17kHz (Nominal) 1 khz to 25 khz Omni ± 2 db up to 25 khz Toroidal 18 Ohms 5 Watts pulsed 15 Metres Nylon or Anodised Aluminium Storage Temperature -4 to +8 ºC Operating Temperature -5 to +7 ºC Polyurethane Ø7mm 2 Core Screened 3 Metres Standard Additional Lengths supplied to order Receive Graph Admittance Plot db re 1V/uPa Conductance ms.4 2 Susceptance ms Transmit Graph Beam Pattern Vertical at 17 khz db re 1uPa/V at 1m dB Divisions Data illustrated is taken from actual in-water measurements 44

46 Communication Transducers MODEL T KHZ CYLINDRICAL TRANSDUCER BROAD BAND TRANSMISSION TRANSPONDER RANGE TRACKING COMMUNICATIONS The Type T257 is one of a series of underwater transducers available from Neptune that are designed for use in transponders, beacons, acoustic release mechanisms and data communication systems. This versatile transducer combines efficient broad band transmission and reception suited to submarine range tracking applications on underwater trials ranges. The nylon base incorporates threaded fastenings and an 'O' ring seal allowing simple and direct mounting onto equipment or pressure housings. Electrical connection is via a twisted screen pair cable. All dimensions in mm 45

47 MODEL T257 Communication Transducers Technical Specification Resonant Frequency Useful Frequency Band Horizontal Beam Pattern Vertical Beam Pattern Impedance at Resonance Input Power Max Operating Depth Base Material Cable Type Cable Length 25 khz (Nominal) 14 khz to 3 khz Omni ± 2 db up to 3 khz Hemispherical 25 Ohms 4 Watts pulsed 2 Metres Nylon or Anodised Aluminium Storage Temperature -4 to +8 ºC Operating Temperature -5 to +7 ºC Polyurethane Ø7mm 2 Core Screened 3 Metres Standard Additional Lengths supplied to order Receive Graph Admittance Plot db re 1V/uPa Conductance ms Susceptance ms Transmit Graph Beam Pattern Vertical at 25 khz db re 1uPa/V at 1m dB Divisions Data illustrated is taken from actual in-water measurements 46

48 Communication Transducers MODEL T218 HEMISPHERICAL BEAM PATTERN BROAD BAND TRANSMISSION DEEP WATER CAPABILITY TRANSPONDER RANGE TRACKING COMMUNICATIONS 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 almost hemispherical beam pattern. The all moulded construction achieves a design that is compact, lightweight and robust. All dimensions in mm 47

49 MODEL T218 Communication Transducers Technical Specification Resonant Frequency Useful Frequency Band Horizontal Beam Pattern Vertical Beam Pattern Impedance at Resonance Input Power Max Operating Depth Base Material Cable Type Cable Length 22 khz (Nominal) 16 khz to 3 khz Omni ± 2 db up to 35 khz Hemispherical 32 Ohms 12 Watts pulsed 6 Metres Anodised Aluminium Storage Temperature -4 to +8 ºC Operating Temperature -5 to +7 ºC Polyurethane Ø9mm 2 Core Screened 3 Metres Standard Additional lengths supplied to order Receive Graph Admittance Plot db re 1V/uPa Conductance ms Susceptance ms Transmit Graph Beam Pattern Vertical at 22 khz db re 1uPa/V at 1m dB Divisions Data illustrated is taken from actual in-water measurements 48

50 Communication Transducers MODEL T24 HEMISPHERICAL BEAM PATTERN BROAD BAND TRANSMISSION DEEP WATER CAPABILITY TRANSPONDER RANGE TRACKING COMMUNICATIONS Cable 4ø Twisted Screened Pair M12 x 1 Thread Mounting Groove for O'Ring Seal The T24 is one of a series 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 T24 combines efficient broadband transmission and reception with an almost hemispherical beam pattern. This transducer has been successfully used to track and position ROVs down to depths of 15 metres. The anodised aluminium base incorporates a threaded fastening and 'O' ring seal allowing simple and direct mounting onto equipment or pressure housings, washer and nut provided. Electrical connection is via a twisted screen pair cable. All dimensions in mm 49

51 MODEL T24 Communication Transducers Technical Specification Resonant Frequency Useful Frequency Band Horizontal Beam Pattern Vertical Beam Pattern Impedance at Resonance Input Power Max Operating Depth Base Material Cable Type Cable Length 54 khz (Nominal) 45 khz to 65 khz Omni ± 2 db up to 6 khz Hemispherical 22 Ohms 25 Watts pulsed 15 Metres Anodised Aluminium Storage Temperature -4 to +8 ºC Operating Temperature -5 to +7 ºC Polyurethane Ø4mm 2 Core Screened 3 Metres Standard Additional lengths supplied to order Receive Graph -16 Admittance Plot db re 1V/uPa Conductance ms Susceptance ms Transmit Graph Beam Pattern Vertical at 54 khz db re 1uPa/V at 1m dB Division Data illustrated is taken from actual in-water measurements 5