Marine Magnetics SeaSPY

The most reliable magnetometer you’ll ever meet. Unfailing data, durable hardware and an easy going disposition make SeaSPY a mag you can count on.

  1. General Details

    The SeaSPY magnetometer product eliminates many of the inherent problems associated with other marine magnetomers such as orientation restrictions, sensor realignment, time and temperture drift and poor absolute accuracy. Marine Magnetic’s SeaSPY magnetometer measures the ambient magnetic field using a specialized branch of nuclear Magnetic Resonance technology, applied specifically to hydrogen nuclei. The SeaSPY sensor is unique in that it is entirely omnidirectional. The amount of signal produced by the sensor is completely independent of magnetic field direction. You never have to orient your sensor, because it is already optimized to work around the World.

    The SeaSPY Towfish includes high sensitivity omnidirectional Overhauser sensor, electronics module containing all of the driving electronics, leak detector, 4 lead weights and SeaLINK data acquisition and GPS logging software for Windows. Also included tow cable, communication transceiver, power supply, altimeter and pressure sensor.


    Key features

    • Digital System
    • High Sensitivity
    • Highest Absolute Accuracy
    • Maintenance Free Sensors, No Realignment and No Consumable Parts
    • Ultra low power consumption
    • Worldwide operation with no restrictions


    • Cable & Pipeline Survey
    • Shipwreck, Search and Salvage
    • Environmental Survey
    • Exploration Geophysics

    Technical specifications

    Absolute Accuracy 0.2nT
    Sensor Sensitivity 0.01nT
    Counter Sensitivity 0.001nT
    Timebase stability 1ppm, -45°C to +60°C
    Range 18,000nT to 120,000nT
    Gradient Tolerance Over 10,000 nT/m
    Sampling Range 4Hz – 0.1Hz
    Power Supply 15VDC-35VDC or 100-240VAC
    Operating Temperature -45°C to +60°C
    Temperature Sensor -45°C to +60°C, 0.1 step


    Description mm inch kg lbs
    Towfish Weight in Air 124 L x 12.7 D cm 49 L x 5 D in. 16 kg 35 lbs
    Towfish Weight in Water 2 kg 4.4 lbs
    Tow Cable Weight in Air 1(outer) x 16.5 (bending) cm 0.4 (outer) x 6.5 (bending) in. 125 g/m 84 lb / 1000 ft
    Floatation Cable Weight in Air 272 g/m 183 lbs/1000 ft
    Floatation Cable Weight in Water -20 g/m -13.5 lbs/1000 ft
  2. Order Enquiry

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