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Hydrophone DG1330



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Digital Hydrophone DG1330 - a digital omnidirectional hydrophone, a professional tool specifically designed and produced for the KM3Net Neutrino project


• Filter frequency is 700 Hz, to reject the low frequency ambient sea-noise (which follows a 1/f shape, and flattens at about 5 kHz)
• Not-filtered version can be also used for acoustic noise monitoring and marine bioacoustics
• Channels (2) with different gain
• Very low self noise on both channels
• Wide frequency range
• High sensitivity, high dynamic range
• 24 bit, up to 216 kHz sample rate
• External 25 MHz digital clock input or internal clock
• AES/EBU interface
• Customizable

Digital Hydrophone DG1330

The digital hydrophone DG1330 is a cutting-edge device designed by Co.l.mar specifically for integration into the world’s largest underwater observatory, the KM3NeT project and installed on ARCA/ORCA neutrino telescopes.

This hydrophone has been customized to seamlessly interface with INFN electronics, ensuring optimal performance within the project’s sophisticated infrastructure. Our hydrophone, chosen by INFN, is designed for recording acoustic signals up to depths of 3500m, with a lifespan exceeding 20 years.
Its external POMC jacket, devoid of metallic com-ponents, mitigates galvanic corrosion risks, facilitating prolonged deployments. Featuring an internal stainless steel core, it ensures resistance against hydrostatic pressure, making it ideal for ultra-deep applications.
Following the success and demand generated by the KM3NeT project, this advanced hydrophone is now available for civilian use in stand alone version. It comes equipped with its own receiver featuring two analog outputs with varying gains, offering flexibility in signal processing. Additionally, it boasts a USB output for convenient signal acquisition directly to a laptop or computer.

Another feature of this system is its versatility in power supply. The entire setup, comprising the hydrophone and receiver, can be efficiently powered using a standard mobile battery charger, enhancing its usability and portability for a wide range of applications in underwater monitoring and research.

Technical specifications

• Working band: 5-90.000 Hz

• High pass filter on preamplifier : 700 Hz (on demand)

• CH1 output sensitivity: -156dB re 1V / uPa @ 5kHz

• CH2 output sensitivity: -176 dB re 1V / uPa @ 5kHz

• Directivity : Spherical – Omnidirectional

• Max working depth : 3500 m

• Gain @5kHz: 46 dB (CH1), 26dB (CH2)

• Equivalent input acoustic noise @5kHz: 34 dB re 1uPa / sqrtHz

• Input impedance: 10 MOhm

• Supply voltage range: 9 – 18 Vdc

• Current consumption: 100 mA @ 12 Vdc

• Output: AES3 protocol

• Weight in air: 1600 g with 4m cable

• Body construction: POMC (stainless steel inner core)

• Dimensions: 330 x 52 mm 

Accessories and optional configurations

• Custom cable lengths and connectors

Digital Hydrophone DG1330 Download

Product sheet – Hydrophone DG1330