SDM-4000: Magnetometer

Specifically designed for anomaly detection, the SDM-4000 is the perfect economical tool for locating ferrous metal objects, on bottom, or buried. This magnetometer is depth rated to 4000 ft and will operate with cable lengths up to 4000 ft. The depressor wing design uses the forward motion of the boat to keep the tow fish down. This saves on the amount of cable required to reach a certain depth.


  • Located ferrous metal objects
  • Depth rating up to 1200 m (4000 ft)
  • Light weight and easy-to-use

Acquisition Software

Included: Magplot v2  (Basic acquisition software)
Optional: DiveLog (Fully integrated survey software)



33 cm x 19 cm x 14 cm (14” x 7.5” x 5.5”) (including depressor wing)


2.08 kg (4.6 lbs)

Power In

6.5 – 15 VDC, 0.4 W

Operation Temp

-40 - 85 C (-40 - 185 F)

Depth Rating

1200 m (4000 ft)

Sensor Resolution

6.7 nT