MHK ISDB/Instruments/Loggerhead DSG-ST Ocean Acoustic Datalogger

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Also made by Loggerhead Instruments

• Remora-ST Glider Acoustic Datalogger

Loggerhead DSG-ST Ocean Acoustic Datalogger

Manufacturer: Loggerhead Instruments

Measurement Category: Acoustic Noise, Animal Monitoring

Operating Environment: Underwater

Version(s): PVC Housing: 250 m depthAl housing: 3000 m depth

Communication Protocol: Internal Logging, USB

Operating Mode: Stand Alone

Power Supply Type: Battery

Power Specification: Battery: 24 alkaline D-cells.

Spec Sheet: http://loggerhead.com/collections/all/products/dsg-ocean-acoustic-datalogger

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Description

DSG-ST Ocean is a low-power underwater acoustic recorder that records to high capacity SD memory cards. The DSG-ST uses lossless X3 data compression to increase recording duration three-fold.

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Instrument Measurements

• Sound Pressure Level (Sound Pressure)
• Presence (Animal Detection)
• Vocalization (Animal Detection)
• Vocalization (Animal Identification)

Measurement Specifications
Max sample rate 288 kHz - highest resolvable frequency is 144 kHz.

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Optional Sensors

No optional sensors provided. Please add sensors.

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Guides and Manuals

Product Web Page: http://loggerhead.com/collections/all/products/dsg-ocean-acoustic-datalogger

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Notes, Considerations & Recommendations

No notes have been provided. If you have worked with this instrument, please contribute your notes.

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User Experience

Contribute your experience

 

Loggerhead DSG-ST Ocean Acoustic Datalogger: User Experience Report

Application: Loggerhead DSG with HTI96-min hydrophone.
Stationary measurements at potential MEC site (currents > 3 m/s) and on drifters in waves and estuarties. Deployments on moorings and near-bed tripods for 1 week – 6 months. Duty cycles 1-100% (memory limited in the past due to smaller SD cards) with continuous sampling at 80 kHz.

Strengths: The device was highly configurable, reliable, and easy to work with. With modern SD memory the duty cycle is largely limited by battery capacity. Customer service was fantastic.

Weaknesses: Although newer versions are different, older models do not provide a way of ensuring the device is operating once the housing has been closed. In previous models it was not possible to synchronize the clock so timestamps were only good to within a couple of seconds.

Ease of Use: The software and firmware are easy to use and the manual is good.

User Recommendations: The continuous sampling rate was limited to 80 kHz, which was more than sufficient for my applications but may not be for others. Numerous changes have been made to the firmware etc since I last worked with the instrument. Some of the shortcomings may have since been addressed with these changes (syncing clock). For example, external LEDs on the hydrophone now indicate power to the instrument without opening the pressure housing.

Submitted On: 06/21/2016