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Dunham & Morrow MAG PRO II - Gradiometer

MAG PRO II - Magnetic Gradiometer
Manufacturer: Dunham & Morrow
Manufacturer part number: MAG PRO II

Mag Pro II Magnetic Gradiometer or Precision Magnetic Locator The only field-portable Magnetic Gradiometer with laboratory accuracy.

Now, increased performance with four sensitivity settings!


The instrument of choice for any serious magnetic search is the Dunham & Morrow Mag Pro II. First introduced in August of 2010, this latest update of the Mag Pro II design increases the instrument's sensitivity by a factor of ten making it an ideal locator for a multitude of uses. The Mag Pro II can now be used to locate smaller and deeper ferrous targets, targets that were previously undetectable. With the Mag Pro II, you can survey a field, a meadow or a shallow-water bog in a matter of minutes and precisely locate any ferrous target such as a knife, a gun, a survey marker, a buried storage tank, or a 55-gallon drum, to name a few. Shock-mounted sensors maintain proper sensor alignment even when exposed to harsh physical abuse. The sensors are waterproof from the bottom of the electronics housing to the sensor tip so you can even perform magnetic surveys of shallow lakes and rivers. We suggest that you perform a general survey of the area of interest on the 20 milligauss range and then increase the instrument sensitivity as needed for a more comprehensive magnetic survey of the same area.

Made in the USA, and the only user-friendly, precision single-axis magnetic field gradiometer on the market, the Mag Pro II's top-mounted LCD panel meter displays the magnitude of the magnetic field in milligauss. In addition, the instrument produces an output that is directly proportional to the magnitude of the external magnetic field gradient. The new Mag Pro II now has a fourth range. In addition to the
2,000, the 200 and the 20 milligauss ranges, we have now added a 2.0 milligauss range. The Mag Pro II is unique in its ability to measure the DC magnetic field gradient of any ferrous target but it also has another unique ability; the ability to measure low frequency, AC magnetic fields.


Lightweight and user-friendly, the state-of-the-art, Mag Pro II Magnetic Gradiometer packs all of its sophisticated electronics in an incredibly light 2-lb package. Shock-mounted sensors maintain proper sensor alignment, even when exposed to normal physical abuse.


The instrument's full scale Sensitivity can be set to 2, 20, 200 or 2,000 milligauss. With the separate Power/Volume and Sensitivity controls,  you won't lose favorite or preset settings every time the Mag Pro II is turned off.

The Mag Pro II typically provides an impressive 40+ hours of operation from a set of standard alkaline batteries. The Low-Battery indicator eliminates those unwanted surprises by providing ample warning of fading batteries 2 to 3 hours before they fail, a real convenience in the field. 


Mag Pro II Specifications

Meter: 3½ digit, LCD (0 to ± 1,999)   Temperature range: (32 - 90) F (0 - 33) C
Full Scale Ranges: 2000 milligauss 200 mg 20 mg 2 mg   Audio Output:


Variable frequency audio output proportional to the differential magnetic field
Low Battery Indicator: RED flashing LED   Dimensions: 42½ x 3¾ x ¾ (108 cm x 9.5 cm x 4.4 cm)
Operating time:


40 hrs, 4-AA alkaline batteries. (80 hrs with lithium batteries)   Weight: 2.0 lbs. (0.9 kg)


36" (91.4 cm) base of electronics to tip of sensor              

Range Full Scale Milligauss

Resolution (LSB) Milligauss

Resolution (LSB) NanoTesla

2000 1 100
200 0.1 10
20 <0.01 1.0
 2 0.001 0.1



Lifetime Warranty

Mag Pro II Magnetic Gradiometers are warranted by Dunham & Morrow to be free from defects in material and workmanship. This warranty is extended to the owner of the product and is valid for the lifetime of the product; a period that extends no less than 25 years from the date of purchase. The batteries and meter are specifically excluded from this warranty as is exposure of the internal electronics to salt water or battery acid corrosion.

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Warranty Lifetime
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