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DH-LN100 
Low-Noise Integrated Digital Hydrophone

High-fidelity autonomous underwater acoustic sensing & data logger for faint marine signal recording
​ 6000 m Depth Rating | 10 Hz ~ 100 kHz | 24-bit | Ultra Low Self-Noise

DH-LN100 is a highly integrated self-contained underwater acoustic sensor and data recorder. It independently completes underwater acoustic signal capture, digitization and local storage. Featured with wide bandwidth, ultra-low self-noise, large dynamic range and high sampling precision, DH-LN100 can reliably capture faint signals including ocean ambient noise, high-frequency marine bioacoustics and offshore engineering noise. It maintains high-fidelity recording performance even in complex, noisy underwater environments.


It serves marine scientific research, ocean environmental monitoring, offshore energy exploration and underwater security. Widely adopted for deep-sea expeditions, marine ecological surveys and offshore wind farm noise assessment, it meets industry requirements for high-precision, reliable and time-continuous underwater acoustic data acquisition.​

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DH-LN100 Low-Noise Integrated Digital Hydrophone

DH-LN100 Digital Hydrophone  

Key Features

  • Ultra Low Noise LN Version 
    Low self-noise @1kHz: 31 dB re μPa²/Hz, optimized for marine mammal & faint bioacoustic recording
  • Wide Bandwidth 10 Hz ~ 100 kHz (-3dB) 
    Covers ambient low-frequency ocean noise up to high-frequency biological clicks
  • 24-bit ADC & 140 dB Dynamic Range 
    Captures both quiet background and strong impulsive noise without clipping
  • Deep-Sea Rated 6000 m 
    Pressure housing for abyssal deployment, compact 920g weight
  • Multiple Sampling Rates & Low Power 
    Selectable 64/128/256/512 ksps; ultra-low standby consumption for field missions

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Specifications

Item Specification
Working Bandwidth (-3 dB) 10 Hz ~ 100 kHz
Sampling Rate 512 / 256 / 128 / 64 ksps, software selectable
ADC Resolution 24 bit
Self-noise @1 kHz 31 dB (re: μPa²/Hz)
Sensitivity @1 kHz -174 dB (re: 1 V/μPa)
Dynamic Range 140 dB
Onboard Storage Default 512 GB, Max 1 TB
Interface 100Base Ethernet / RS485
Supply Voltage DC 10 V ~ 18 V
Typical Power Consumption 0.891 W @512 ksps
0.756 W @256 ksps
0.714 W @128 ksps
0.655 W @64 ksps
Standby Power ≤0.0004 W
Max Continuous Recording Time 32 h (4200 mAh battery, expandable)
Weight 920 g
Max Working Depth 6000 m

Applications


  • Marine Bioacoustics Research 
  • Ocean Ambient Noise Monitoring 
  • Offshore Wind Farm Noise Measurement 
  • Deep-sea Scientific Expeditions 
  • Subsea Engineering Noise Survey 
  • Underwater Security & Acoustic Detection 

Horizontal / Vertical Directivity Curve

Horizontal-Directivity-Plot_Vertical-Directivity-Plot_DH-LN100-Low-Noise-Integrated-Digital-Hydrophone

Dimension Drawing

 Dimension-Drawing_DH-LN100-Low-Noise-Integrated-Digital-Hydrophone

Documents


DH-LN100 Digital Hydrophone Datasheet