Schonstedt Locators

Magnetic Locators GA-52Cx

Holland Equipment, Utah

Unmatched sensitivity allows you to find what you're looking for quickly, without the risk of passing over your target.

Our locators last 100% to 250% longer than others,
making your investment a solid one.

85% of the Surveyor market can’t be wrong.

Quality Is Our Hallmark
Schonstedt's underground magnetic locators have been setting the standards for reliability and dependability for over 30 years. They are designed to withstand the rigors of daily on-site usage and a wide range of environmental conditions. In fact, the Model GA-52Cx is so rugged and dependable it's backed by a 7-year warranty.

Specifications & Features


  • Seven Year Warranty
  • Enhanced target definition
  • Unsurpassed detection range
  • Piezoelectric speaker
  • Clear, sharp, detection signal pinpoints the target
  • Five individual sensitivity settings
  • No response to aluminum, brass, or copper
  • Ease of operation reduces search time
  • With experience, user can distinguish between small pieces of scrap iron and actual targets
  • 40-hours operation (intermittent usage) on two economical 9-volt batteries
  • Modular construction
  • High performance components
  • Weights approximately 2 1/2 lbs
  • Weather protected controls
  • Rugged lightweight case
  • Patented HeliFlux® sensors

Both the GA-52Cx and the GA-72Cd are standard with a custom case designed to withstand the rigors of field use.


Input Power

Two alkaline 9-volt batteries

Battery Life

40 hours (intermittent usage)


Approximately 40 Hz audio tone on speaker.
Tone frequency increases or decreases with gradient-field intensity.


Approximately 2.5lb. (1.13 kg.)

Operating Temp

-13° to 140°F (-25° to 60°C)

Overall Length

42.3 in. (107.4 cm)

Waterproof Length

34.5 in. (87.6 cm)

Nominal Sensor Spacing

20 in. (50.8 cm)


Modular, all solid state

(We reserve the right to change specifications)

The GA-52Cx Locator detects the magnetic field of iron and steel objects and energized power lines. Both provide audio detection signals that peak in frequency when the locator's tip is held directly over the target.

No. 1 Around the World
in Performance and Reliability.

Only two Controls
Designed for one-hand operations, the On/Off-Sensitivity and Volume controls are located on the underside of the cover on both locators. This provides easy access, protects the knobs and contributes to their overall ruggedness and dependability.


Check out our other locators too:

Magnetic Locator GA-92XTi & GA-92XTd

A Magnetic Locator that will single handedly
change the way you work in the field

GA-92XT in hip holster

  • One hand operation
  • Operates in both retracted and extended modes
  • Fingertip control of volume and sensitivity
  • Quick change battery compartment
  • Battery indicator on both models

…and best of all, it’s a SCHONSTEDT
Rugged, reliable and a 7-year warranty

Schonstedt XT - Extends for greater sensitivity, Retracts for easier carrying. Read more...

Time to make a move to the new Schonstedt XT, the greatest innovation in magnetic locating since the celebrated "yellow stick". In its holster, the XT leaves both hands free on the way to the job site, then gives you the freedom to do your best work with one hand tied behind your back.


Magnetic Locators GA-72Cd

Unmatched sensitivity allows you to find what you're looking for quickly, without the risk of passing over your target.

Our locators last 100% to 250% longer than others, making your investment a solid one.

Audio signal and 3-digit LCD readout


Magnetic Locator Comparison Chart







Major features

Most Popular
Least Expensive
Most Sensitive

Most Rugged
Most Popular for UXO and Demining Applications

Most Portable
Comes with Holster
Most Ergonomic

Most Portable
Comes with Holster
Most Ergonomic

Magnetic Locator like GA-52Cx
Includes dual frequency Pipe and Cable Locator






























Sensitivity controls

5 levels

4 levels





Locating Tips: Magnetic

Magnetic Locators and Circuits
Magnetic locators such as the GA-52Cx and GA-72Cd can be used to determine if a circuit is active, such as an automobile rear window defogger grid, or a radiant heat panel. Set the sensitivity of the locator on high, and place the instrument sensor (the tip) near the window grid, ceiling panel, etc. Listen for a change in the output tone when the circuit is activated by its on/off control.

Searching Near a Fence
Searching in the vicinity of a chain link fence requires a reduced sensitivity setting and also some control over the orientation of the locator. As illustrated in Figure 13, position the locator horizontally, with its long axis perpendicular to the fence. This ensures that the upper sensor is kept away from the fence.

Perform the search by slowly moving the locator forward along the fence while also moving it in to the right and to the left. This technique allows you to search an area several feet wide as you move forward. Listen for an abrupt drop in the signal, (as shown by the null in Figure 14.) that will occur when the lower sensor, located 1-5/8 inches from the end of the locator, is directly over the stake. Any variation in the position of the locator will produce an abrupt rise in the frequency of the signal.

Locating Tips: Figure 13
Figure 13

Locating Tips: Figure 14
Figure 14

Energized Power Lines
A burbling sound on the GA-52Cx or GA-72Cd indicates the presence of an energized power line.

Determining Target Depth by Triangulation with the MAC-51Bx
The receiver can be used for the traditional triangulation method to determine the approximate depth of a target as illustrated in below. However, when using this method it is necessary to take into account the fact that the center of the cable-sensor is located 11 inches up the receiver tube from the black tip. When the position of the target has been determined by the null, mark the spot (#1) on the ground. Hold the receiver tip on the ground at this spot, slant the instrument at a 45o angle and slowly move directly back, to one side, from the target until a second null is obtained. Now mark a spot (#2) on the ground that is directly below a point 11 inches up the receiver tube from the black tip. Measure the distance between spot #1 and spot #2. This measurement indicates the approximate depth of the target.

You should always take a depth reading on both sides of the line. If the measured distances between spots #1 and #2 on both sides of the line are not the same, there is a good chance that a nearby line is causing the two measurements to be different. Move further along the line and repeat the depth reading procedure until the measurements are the same on both sides of the line. Once two very similar measurements are obtained, the calculated depth of the cable will always be within 4 to 6 inches of its actual depth.

Locating Tips: Triangulation

GA-72Cd Audio Response
Tired of the continuous tone of the locator? Remove the cover and move the slide switch to the other position. The locator sound will now change in volume as the presence of the target becomes stronger (instead of changing frequency).

Location of Audio Output Switch




Holland Equipment Co.     2870 West 2100 South - SLC, UT 84119 - (801) 972-1601 - (800) 234-8611 - FAX (801) 972-6730