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Subsurface Instruments Magnetic Locator ML-3SY (Short)


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  • Model: ML-3
  • Manufactured by: Subsurface Instruments
  • Ship Lead Days: 10

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The ML-3 is a much-anticipated and welcome addition to the ML family of magnetic locators from SSI! ML-3 magnetic locators represent the best in innovation at work for the water/sewer industry, surveying industry and military.

That's because the ML-3 reflects many of the items on our customers' technological wish lists. The ML-3 short is 40" to meet surveyors' personal preference, providing an ergonomic, lightweight, durable, one-handed operation option to traditional magnetic locators. The ML-3 offers unparalleled durability, as all components are housed inside the aircraft-grade aluminum monotube units.

But don't let its looks fool you. It's waterproof up to 75 feet - a first for the industry - so it can be used in difficult weather and submerged under water. A new feature allows the ML-3 to provide readings that can be heard under water. Plus, its auto-zero feature allows the user to "cancel" ambient magnetics or magnetic gradient in the soil or water. And it's digitally tuned, so it offers unparalleled accuracy in detecting ferromagnetic objects at depths up to eight feet.

Low battery indication with flashing LCD when batteries need replacing
Varying pitch audio signal mode using a moving coil speaker for enhanced audio output
Waterproof sensor tube pressured tested to water depths of up to 75 feet
Easy-to-use, one-handed operation with four-button keypad:

On/off button: Turns unit on or off.
Zero button: Automatically calibrates unit to ambient magnetic conditions
Gain up button: Increases the locating sensitivity of the unit
Gain down button: Decreases the locating sensitivity of the unit
Includes soft case with carrying straps and inside pocket for batteries and manual
Rugged construction for field conditions
Detection of buried ferrous metal objects at depths up to 8 feet
Hand gun: One to two feet
175mm projectile: four to five feet
55-gallon drum: Six to 10 feet
Detection of ferrous metal objects and weapons on persons
Over 5,000 ML1M units in Afghanistan used for detection of improved explosive devices (IEDs) and unexploded ordinances (UXOs)
Underwater search and detection of:

Submerged vehicles
UXOs and mines
Salvageable wrecks
Pipes and cables
Weight 1.8 lb. (.8 kg)
Overall length 40 in. (101.6 cm)
Waterproof length 24 in. (61.0 cm)
Audio Speaker pitch increases in frequency proportional to gradient field intensity
Visual LCD display with bar graph indicating polarity and relative strength of signal. Also provides low battery indication.
Input power Three standard 9-volt alkaline batteries
Long battery life Approximately 60 hours
Operation temperatures -13 to 140 F (-25 to 60 C)
Exterior sensor tube Aircraft grade aluminum
Sensor operating frequency 16.5 KHz
Warranty 7 years
Features include 'Zero Adjust' that compensates for a magnetic gradient in the soil.
  • The single narrow LCD monitor is built into the keypad and features a bar graph that expands according to signal strength. A '+' or '-' illuminates above the graph to indicate polarity.
  • The SSI ML-3SY computer microprocessor retains volume and gain settings from last use.
  • Sturdy tube-through-construction ensures stability and long life.
  • The ML-3SY will operate between 80 and 100 hours on AA alkaline batteries.
  • The #ML-3SY measures 40 in (1 m)
  • Includes soft carrying/storage case.
  • Weighs 1.95 lb (0.89 kg)