Multi-purpose Above/Below Surface Expendable Sonde

MASED (‘May-Z-D’) is one of Boston Engineering’s low-cost, modular, configurable, family of versatile maritime sondes/profilers that collect critical data such as conductivity, temperature, and depth (CTD) and meet multiple research, commercial, and defense needs.

MASED addresses rapid intensification and other critical research applications by taking multiple, targeted profiles in the ocean’s critical areas


  • Expendable or recoverable
  • Multiple, untethered dives followed by resurfacing (“profiles”)
  • Onboard power (rechargeable optional)
  • Low-cost, replaceable conductivity, temperature, depth sensors standard (other sensors possible)
  • Automatic satellite communications
  • Hand, vessel, or air-droppable
  • AVAPS sized & launched
  • Allows colocation of AVAPS atmospheric and ocean data
  • Flexible, robust expanding antenna mast for robust comms
MASED sonde launches from an aircraft

Technology Highlights

  • 16.5 in. long x 2.75 in. diameter with air drop kit attached (shown) – AVAPs size
  • 2.6 lbs. dry weight (wet wt.: neutral)
  • Self-releasing & detaching parachute
  • Operational depth rating: 200m (deeper profiles possible)
  • Standard number of profiles: 5+ *use dependent
  • Standby time: Weeks
  • Iridium communications
  • Easy to use/launch,
  • Programmable profiles
  • Standard sensors:
    • Conductivity, Temperature, Depth
    • GPS
    • IMU
  • Ask about other comms & sensors

Prototypes available.  Product ready for sale 2022/23.


Michael Rufo
Vice President for Research and Development
Tel:  781-314-0723

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