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Subsurface Instruments Magnetic Locator ML-3LY (Long)


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  • Model: ML-3LY
  • Manufactured by: Subsurface Instruments

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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 long is 55", making it the longest magnetic locator on the market. It allows you to make the biggest sweeps possible without compromising on accuracy, thanks to its two-sensor unit specifically designed to locate items more deeply. The ML-3 long provides ergonomic, lightweight, durable, one-handed operation option to traditional magnetic locators. It 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.

Easy and simple one-hand operation; built-in handle
Easy to learn; 3 keypad switches: on/off and volume, sensitivity up and sensitivity down
Volume built into the on/off key; just hold down the key while it cycles through the settings
Microprocessor remembers the volume and gain settings from the last time the unit was on
Non-metered (ML-1) and metered (ML-1M) versions are designed to look, feel and operate the same
ML-1M version with LCD shows positive or negative polarity and signal strength. Detect edges of covers, pipe joints.
ML-1M adds features without complexity. No learning curve between units.
Strong aluminum monotube construction from the tip through the end of the handle and ABS injection-molded electronics case provide the best structural integrity in a hand-held locator
Lightweight; only about two pounds including batteries
Uses 2 regular alkaline 9-volt batteries, parallel; the unit is shipped with two spare batteries
Soft pack carrying case included
Battery compartment separated from electronic components and circuit board. No exposing electronics to replace the batteries.
Weight 2.8 lbs. (1.3 kg)
Overall length 55 in. (139.7 cm)
Waterproof length 33 in. (83.8 cm)
Waterproof depth Sensor tube pressure tested to water depths up to 75 feet
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 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-3LY computer microprocessor retains volume and gain settings from last use.
  • Sturdy tube-through-construction ensures stability and long life.
  • The ML-3LY will operate up to 200 hours on C alkaline batteries.
  • The #ML-3LY measures 40 in (1 m)
  • Includes soft carrying/storage case.
  • Weighs 2.50 lb (1.14 kg)