2010 Complete Electronic Version

Spherical TransducersMODEL D/140● OMNI-DIRECTIONAL RESPONSE● LOW NOISE PERFORMANCE● ACOUSTIC REFERENCE STANDARD● BROADBAND OPERATION● AIR GUN & BOOMER MONITOR● MARINE MAMMAL AUDIO SENSORThe D/140 is one of a group of spherical transducers exhibiting a combination of broadbandfrequency response, omni-directional beam pattern and high sensitivity.A versatile transducer with a wide range of receiving and transmitting applications the D/140is equally at home as a cost effective, general purpose hydrophone or as a precision acousticsensor.The all moulded construction coupled with the inherent strength of the PZT ceramic sphereachieves a lightweight, corrosion free and extremely robust design making it the ideal choice asa monitor hydrophone.The outer jacket of both the cable and moulded stalk are in a polyurethane material, enablingthe transducer to be potted directly into customised equipment pods or underwater connectors.The D/140 is available with or without acoustic calibration. All calibrations are traceable toNational Standards.35306ø20ø10ø12.5øAll dimensions in mm11© NEPTUNE SONAR LIMITEDContinued development necessitate specification changes without notice

MODEL D/140Spherical TransducersTechnical SpecificationResonant FrequencyBeam PatternReceive SensitivityTransmit SensitivityCapacitance at 1 kHzInput PowerOperating DepthOperating TemperatureStorage TemperatureCable TypeCable Length150 kHz (Nominal)Omni ± 2dB up to 160kHzSee GraphSee Graph3500pF100 Watts around resonance1500 Metres-5 to +40ºC-40 to +80ºCPolyurethane Ø6mm Low Noise Coaxial10 metres standardAdditional lengths supplied to orderReceive Graph-160-170Admittance Plot34dB re 1V/uPa-180-190-200-210-220-230-240Conductance mS21321Susceptance mS-250-2601 10 100 1000Frequency kHzTransmit Graph17016000120 125 130 135 140 145 150 155 160 165 170 175 180Frequency kHzBeam Pattern at 150 kHz0150140dB re 1uPa/V at 1m13012011010090-9090807060501 10 100 1000Frequency kHz5dB DivisionsData illustrated is taken from actual in-water measurements© NEPTUNE SONAR LIMITEDContinued development necessitate specification changes without notice12