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GREAT 2S user manual


We are the first great detectors company in the world in the field of manufacturing and selling gold prospecting devices, burials, and precious treasures.

We started our work in 2012 in the manufacture and sale of hardware products specialized in the search for minerals, gold, and groundwater, so we became one of the first to manufacture and sell the best devices in the world. 

This experience is the result of our love to be the best and highest professional
we work with.

We are not the only ones in this field, but we excel in our products and our
work, we are a Great Detector Company, we work through direct sales and agents located all over the world, we manufacture and sell all the original Turkish Great detectors products in the world, and we are the only exclusive agents in the world for these products, our company is headquartered In Turkey in Istanbul, you can contact us through the information provided at the boom of the web or through the web page to contact us.



Device Overview2


Package Contents4


Select Language & Device6

Connecting to device7

System Selecting8

3D Ground Scan9

Diagram Analysis12

Scanned Files13

3D Scan Controllers14


Package Content



To start using the device follow the below steps: 

  1. Put and connect the tablet holder on the device. 
  2. Connect the USB cable of the device to the OTG cable 
  3. Connect the micro USB side of the OTG to the Android device.
  4. Turn the device on using the ON/OFF Buon on the device

when all the above steps are done; select the GRT app from the list of available apps on your Android device.


Select Language & Device

After opening the application, wait for the below screen to end and redirect to the
the first page of the application.

Language and device model selection page
On this page, the user can use the left-right keys to change the language of
the application. Each me you click on the left or right keys, the program language changes directly.

At the boom of this page, there is a list of GRT manufacturing devices that the user can select from the list of the devices that he owns. After selecting the language and selecting the correct device, click on the connect button.

Connecting to Device

Note: If you have just connected the device to an Android device, you will see a message that Android asks for a USB connection on permission. Click OK to accept, then click the Connect again and wait for the connection to be established.

Note: If the user selects a device different from the device connected to the
Android device, a message will show that “Your device does not match the chosen device” and the program will not be transferred to the next steps and will remain on the same page.

Note: If you have just connected the device to an Android device, you will see a message that Android asks for a USB connection permission. Click OK to accept, then click the Connect again and wait for the connection to be established.

System Selecting

System selection page After the previous steps, you will see the page below, which includes all the active systems for your device.

Note: The number of active systems depends on the device model. Below are the systems which is active for GRT 2S Detectors


3D Ground                      Discrimination

3D Ground Scan

The 3D ground scan system in the GRT device uses the latest technology to
send and receive signals in the device direction and using a 3D analyzer is able
to draw a 3D diagram of possible objects in the underground.

How to use

After completing the connections, opening the application and selecting 3D
scan system, you will see a page where you have to set the soil type, number of
steps, number of scan lines, and type of moving direction before searching.

Set the above setting and press Start to open the scan page

Then stand in the desired location and place the device perpendicular to the
ground at a distance of 5 to 10 cm from the ground. Depending on the Android
screen, press the scan button on the device once with each step (with mini-
mum, one second between each pressing). And wait for the result of each scan
to appear on the screen.

Note: If you do not see a change in the display after pressing the scan button,
Press the scan button again without taking the next step.

Continue until you reach the end of the line, then move on to the next line and
start the scan again.

Note: For better and exact results, you have to press on start exactly every 30 cm
per each step.


Note: If you have selected the zigzag mode, you must do the scan in a zigzag
pattern, and if you have selected the parallel mode, the scan must be done in
parallel pattern.



If you reach the end of the finish line, the device will no longer accept data. And
It means the scan is complete.

Note: The end point depends on the setting which the user chossed before starting scanning...


Diagram analysis


Scanned files

All scanned diagrams will be saved automatically after closing the 3D scan

To re-view the file (s), the user can click on the file icon on the right side of the scan screen, a list will open with includes all previously scanned files.

Note: By long click on each file in the file list, a message will appear that allows the user to delete the file.


Screen reset

 Use this icon to reset the diagram on the screen on the top view

 Diagram Setting

user can use this option to change the appearance of the 3D diagram or its
color. Clicking on this icon will open a sliding window that has the following

Red compress:

By increasing and decreasing the red slider bar, you can increase or decrease the intensity of the red color density in the chart.

 Blue compress:

By increasing and decreasing the blue slider bar, you can increase or decrease the intensity of the blue color density in the chart.



By clicking on this option, the above color settings can be reset to the default.

3D Screen Controllers

 Grid mode:

By clicking on this option, the shape of the graph changes from a surface mode
to a network mode. Clicking again on this option will change the shape of the
chart to flat again.


       Solid Mode                    Grid Mode

Colors Filter: Using these three color buttons, you can remove or re-add the desired color from the diagram. This option is used to better detect the desired colors in complex scans.



       Blue Color Filtered                  Red Color Filtered


Point Locating

Using these options, you can point to a specific feature and check the depth of
that point.
X + and X-: to control the location of the line perpendicular on the surface.
Y + and Y-: Used to control the location of the horizontal line on the surface

Z + and Z-: Used to control the location of vertical and horizontal lines on surfaces for depth measuring depth.


Use this icon to open a view with includes four different parameters on the

Value: shows each scan value while scanning.
1. Deep: shows the deep of the located point on the diagram.
2. Level: shows the level value (cm)
3. Step: shows the step value (cm)

Use this icon to exit 3D scan screen


This system determines whether the burial is valuable or worthless by sending
and receiving pulses through the device sensor and analyzing the received
pulses. It is recommended to use this system when excavating the burial through a 3D scanning system and to ensure the value of the burial before excavation.

How to use
After discovering the tomb and determining its approximate point by the 3D
scanning system, enter this system through the main menu on the Android
device. By selecting this item, a black and empty window will open that Notices
“press on start”.

Press and hold the Scan Button

Position the device perpendicular to the desired point and press the Scan
button on the device (press and hold). Then start moving slowly and in one
direction. A graph is displayed on the screen of the Android device, which can
be analyzed to determine the buried value. Below are examples of different diagrams.

Note: The Distance between the probe head and the surface of the earth must
be 5 to 10 cm

                                 example graph for ferrous metals


                       example graph for non-ferrous metals


                                example graph for cavity


Detector Online Training

With your new detector, you will receive a Quick Start Guide, a valuable resource designed to guide you through the essential steps of operating your new device seamlessly. This user-friendly guide is tailored to ensure that even beginners can quickly grasp the fundamental functions and features.

For those seeking a more profound understanding, a comprehensive manual accompanies your purchase. This detailed manual delves into the intricacies of your detector, providing a wealth of information for users eager to explore advanced settings and capabilities.

However, the pinnacle of expertise in harnessing your detector's full potential lies in professional training. While guides and manuals offer a solid foundation, professional training takes your knowledge to the next level. Through hands-on instruction and insights from seasoned experts, you'll gain a deeper understanding of your detector's nuances and unlock its optimal performance.

During the individual training, our detector Expert addresses your wishes and questions, provides you tips and tricks and helps you to improve your chances of success with your detector.

  • Theoretical introduction
  • Overview of the functionality and operating modes of your detector
  • Using the detector on the test field
  • Tips and tricks for advanced users
  • Improving your measurement procedure
  • Evaluation of the scans on the detector display
  • Answers to your questions

In addition to a general introduction to the functionality and operating modes of your detector, the detector Expert explains how to use the detector efficiently in the field. In doing so, he can correct small errors during the measurement and advise you on special features of your search projects.

You will learn how to check your measurements and further improve your scanning technique independently. You can also draw initial conclusions about potential target objects in the underground.

  • Service & Support: for entry-level, experienced and professional detectorists
  • Schedule: After you add the paid training, we will contact you to schedule your training with our expert.

Trainings are charged per hour! Additional costs may apply for training sessions. For special requests please contact us at