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eXp 4000 - metal detector and 3d ground scanner

The Earth Imager are the stars of our "FS - Future Serie". They can represent graphical measuring results without using any additional computer. Because of the high amount of optional accessories they are extendable individually. Every customer can purchase only that what he needs for his purposes.

The eXp 4000 metal detector is a powerful 3d ground scanner for treasure hunting and archaeology.
The eXp 4000 metal detector is a powerful 3d ground scanner for treasure hunting and archaeology.
The eXp 4000 ground scanner is lightweight and easy to use for even novice treasure hunters.
The eXp 4000 ground scanner is lightweight and easy to use for even novice treasure hunters.
The eXp 4000 ground scanner has been intensively tested by the Kellyco Test Team in Florida, USA.
The eXp 4000 ground scanner has been intensively tested by the Kellyco Test Team in Florida, USA.
The operator of the eXp 4000 metal detector conducts graphical 3d scans in an old ghost town.
The operator of the eXp 4000 metal detector conducts graphical 3d scans in an old ghost town.

Made in Germany
Made in Germany

Tested and certified by one of theleading technical experts in GermanyView Certificate
Tested and certified by one of the
leading technical experts in Germany

View Certificate

Data transmission via USB
Data transmission via USB

Compliance with the CE policies
Compliance with the CE policies

The eXp 4000 metal detector is by far the most successful geophysical instrument of all our 3d ground scanners. This 3d metal detector is mostly used by treasure hunters, archaeologists and anyone who is looking for gold or hidden treasures underground. The many treasure finds worldwide has proven that the eXp 4000 really fulfills all of the requirements which are needed to be successful. By using the eXp 4000 ground scanner many buried items can be located at depths beyond most other metal detectors.

Characteristics and applications of the eXp 4000 ground scanner

Lightweight portability, packed in a shock protective Peli transportation case so it can be taken everywhere, also in areas difficult to access. The easy handling makes it suitable for everybody. You don't have to be a metal detecting expert to use this treasure detector.

The eXp 4000 ground scanner is specially designed for the following applications:

  • Archaeological surveys, metal detection, treasure hunting and gold prospection
  • locating the exact position of buried treasures and artifacts
  • 3d metal detecting including size and depth
  • detecting gold and other items of great value
  • finding ancient artifacts, hidden treasures, gold, silver, bronze, hoards of coins, treasure deposits, chests
  • tunnel and cavern locating

The eXp 4000 metal detector has been used successfully by our customers for the following jobs:

  • Detection of hidden historic artifacts, coins and valuable figures in North Africa (Maghreb countries)
  • Detection of ancients coins in Syria
  • Localization of underground tunnel and bunker systems with hidden treasures on the Philippines
  • Detection of relics and ancient artifacts from the former Persian Empire in Iran and around
  • Bottle detection in Suriname
  • Detection of bronze statues, antic plates and artifacts in Balkan area
  • Ghost town hunting and prospecting in USA, Mexico and Canada
  • Detection of large quantities of ancient coins and lost guerrilla gold in Greece
  • Localization of underground bunker systems from WWI in Belgium

Due to specialized antennas the eXp 4000 ground scanner can also be used in mineralized areas for treasure hunting.

The comprehensive equipment of the eXp 4000 metal detector is only one point that makes it a unique treasure hunting unit. Every single probe was optimized for its own purpose. So you can work with the following antennas:

  • GPR-Antenna ( 25 cm, 50 cm, 75 cm, 100 cm )
  • Antenna for metal discrimination ( DDV system )
  • Antenna for tunnel detection
  • Super Sensor for high resolution ground scans
  • FS-Thermoscan for 3D infrared images

The measurement unit of the eXp 4000 includes a PC-module with which data is displayed immediately on the full color screen. During the scanning procedure a laptop computer is not required, you can see the results directly on the screen. Advanced technology allows measurements in brilliant resolutions. Measured data is stored in the 256 MB memory and can be transferred later to a computer. Transferring measured values to a computer allows the operator to evaluate and compare all stored data. In doing this the operator can determine depth, size and position of targets using the professional Visualizer 3D software.

The eXp 4000 3d ground scanner has several characteristics that set it aside from other technologies:

  • lightweight portability
  • non-intrusive live ground surveying
  • quick and easy set up and operation
  • live color coded surveys
  • allows for impromptu and fast surveys
  • immediate on-site interpretation of target area
  • measured values showing extreme depth of survey
  • measured values showing location of targets within surveyed area
  • highly sensitive and accurate detecting device

Technical certificates and 2 years of warranty are standard for all OKM metal detectors. Extensive field tests ensure the high quality of all OKM ground scanners which leave our factory.

Customized packages of the eXp 4000 metal detector

The eXp 4000 metal detector has a wide range of optional components for various searching needs. We offer 3 customized packages: Basic Edition, Gold Edition and Professional Edition. You may also build your individual customized package for your specialized treasure hunting needs.

Basic Edition: The Basic Edition includes all of the basic components which are needed to operate the 3d ground scanner. It is configured for getting started in 3d metal detection. This means that the central components such as the control unit with monitor, the Power Pack with charger and travel adapter, the headphones and joystick, the Visualizer 3D software, usb cable, Peli transportation case, user manual and one 25 cm GPR antenna with telescopic rod assembly are included. With this basic package you are able to conduct 3d scans, find metal targets and voids and determine position, approx. size and depth.
Additional accessories can be purchased at any time to increase the field capabilities of your unit.

Gold Edition: The Gold Edition is a specialized ground scanner package for all gold prospectors and treasure hunters. It comes with all of the components of the Basic Edition and includes additional probes for gold and treasure detection. The high resolution Super Sensor and the DDV system (visual metal detector) are included. These add-ons enable the user to distinguish different types of metals and can concentrate on the precious targets and items of great value. Also included is an additional Power Pack giving you more time in the field to search for the buried gold.
Additional accessories can be purchased at any time to increase the field capabilities of your unit.

Professional Edition: The Professional Edition of the eXp 4000 metal detector is for professional searching needs and includes all available options. Various probes are included such as all of the horizontal GPR antennas of different sizes, the specialized antenna for tunnel and cavity detection as well as the FS-Thermoscan for infrared measurements.

Here we present you some discoveries, which has been located with this geophysical metal detecting instrument. If you also made a discovery or know somebody who made a fantastic finding with our metal detectors, just write us an email or use our online form!

eXp 4000 ground scanner detects historical artifact

eXp 4000 ground scanner detects historical artifact

A successful treasure hunter from Kermanshah in Iran informed us about his latest treasure find. With the OKM ground-scanner eXp 4000 he detected this historical figure made of bronze in 1,65 m depth. The artefact has a size of 5 cm x 3 cm x 4 cm and shows the head of an animal with bent horns. Unfortunately the treasure hunter was not able to give us more detailed information. Maybe you know what ancient artifact this is? Please contact us at info@okm-gmbh.de.


Iranian treasure hunter finds bronze artifacts in ancient grave

Iranian treasure hunter finds bronze artifacts in ancient grave

A treasure hunter from Iran sucessfully located an ancient grave with his 3d metal detector eXp 4000 from OKM. Inside the grave he discovered several bronze artifacts like figurines and ancient bells.


Ancient coins metal detected and unearthed in Syria

Ancient coins metal detected and unearthed in Syria

A large amount of more than 800 pieces of ancient coins has been detected by treasure hunters in Syria. They found the hoard by using the eXp 4000 metal detector and 3d ground scanner. This coin cache is very valuable and the value of each single coin is estimated from 150 - 8000 Euro.


Sassanian sword found by eXp 4000 in Iran

Sassanian sword found by eXp 4000 in Iran

This treasure find is a sword found by a customer from Kermanshah, a city in the west of Iran. The material is a mixture of iron/lead/copper/tin/gold/silver and antimony. This metal detector find belongs to the Sassanian Empire in the region.

The Sassanid Empire was the last pre-Islamic Persian Empire, ruled by the Sasanian Dynasty from 224 to 651. The Sassanid Empire, which succeeded the Parthian Empire, was recognized as one of the two main powers in Western Asia and Europe, alongside the Roman Empire and later the Byzantine Empire, for a period of more than 400 years.

The detected sword has a weight of about 1650 g and a length of 45 cm. The target has been detected by the earth imager eXp 4000 in the depth about 185 cm in clay soil.


Hidden tomb discovered under church

Hidden tomb discovered under church

An amateur actress uncovered the entrance to a 500-year-old secret chamber, which had been hidden for centuries, when she accidentally stamped her shoe through one of the floor tiles at St. Mary's Church, in Redgrave, Suffolk. Just weeks before, a geophysicist had used state-of-the-art ground scan detectors (eXp 4000, Rover C II) to locate the long-forgotten vault. There was just one last thing to do ... finding the entrance.


New historical findings in Syria

New historical findings in Syria

Once again customers from the Middle East area informed us about new finds with their treasure detector eXp 4000. The precious ancient artifacts has been excavated in Syria. These very special targets were hidden about 1,20 m underground. The measurements in eXp 4000's Ground Scan mode has been confirmed before digging with the DDV system (visual metal detector system with metal discrimination).


Treasure finds from Balkan area with eXp 4000

Treasure finds from Balkan area with eXp 4000

Since 1 year the owner of the OKM ground scanner eXp 4000 from the Balkan area is using his locating equipment with many success. He sent us some photos of his findings. Based on his historic knowledge he explored many interesting sites where possible antique treasures could be located. He scanned these areas with the 3d metal detector eXp 4000 and was able to locate many ancient items.


Ancient coins found with eXp 4000 in Greece

Ancient coins found with eXp 4000 in Greece

A treasure hunter from Greece, who is using eXp 4000, found several ancient coins within an old grave. The treasure contains about 54 coins in three different sizes and motifs. Unfortunately the treasure hunter could not give any details on the age or regional provenance of the coins.


16 kg coins detected with OKM metal detector in Maghreb area

16 kg coins detected with OKM metal detector in Maghreb area

One of our customers from Maghreb in North Africa reported about his successful treasure hunt. He was using the 3d metal detector and ground scanner eXp 3000, the predecessor of the earth imager eXp 4000, when he located some anomalies inside the underground. The customer was searching in very uneven ground and therefor he used the 25 cm GPR probe of his geophysical phase reader to obtain accurate detecting results.


Bottles and spanish silver coins found in Suriname

Bottles and spanish silver coins found in Suriname

A small team of treasure hunters from the US has been made a wonderful discovery on the coast of Suriname. By using the metal detector and treasure hunting detector eXp 4000 they located a lot of glass bottles. Furthermore they discovered a spanish sword as well as silver coins.


Ancient door beaters found by metal detector eXp 4000

Ancient door beaters found by metal detector eXp 4000

These ancient door beaters has been detected with eXp 4000 in the Middle East area. The beaters, made of pure gold, were used in ancient times on wooden doors. The targets were buried single in the ground and has been located at a depth of 140 cm. The gold rings were dug up without any patina visible on the surface and are well preserved.


Dugout from World War I detected

Dugout from World War I detected

Geophysical investigations with the metal detectors Future I-160 and eXp 4000 over an unimpressive field in Belgium unearthed astonishing discoveries. For 90 years it was hidden deep under the surface of the Belgium ground but now the underground bunker system is explored by british scientists. This is the start of an exciting time travel back into the time of World War I ...


Unexpected discovery in Saudi Arabia

Unexpected discovery in Saudi Arabia

A customer from Saudi Arabia informed us about his beautiful discovery. The treasure has been located by the metal detecting instrument eXp 3000 - the former model of eXp 4000. The treasure seeker informed us about the following discoveries, which has been made: a gold statue, a Nofretete statue and a Pharao statue. There are still lots of hidden treasures which wait to be discovered in Saudi Arabia and other Middle East countries.


Gold prospector detects ancient gold coins using Earth Imager eXp 4000

Gold prospector detects ancient gold coins using Earth Imager eXp 4000

A greek gold prospector, metal detecting with Earth Imager eXp 4000, found several gold coins. He told us about his finding during a visit in our company. He located the treasure in approx. 2 meters depth. These ancient coins are very precious, as confirmed by archeologists.


eXp 3000 discovered bullions of the guerillas

eXp 3000 discovered bullions of the guerillas

In november 2005 some of our customers found a wooden chest filled up with gold bars. Those bullions were buried during the World War II by greek guerillas. The treasure hunters and archeologists used different metal detectors and geophysical instruments like the Earth Imager eXp 3000, the predecessor of eXp 4000.


Earth Imager eXp 3000 detects ancient dagger

Earth Imager eXp 3000 detects ancient dagger

This ancient dagger from the early middle age was found in a depth of 60 cm. After unsuccessful searches with different other metal detectors the dagger has been detected with the basic equipment of the Earth Imager eXp 3000. Only the iron blade kept well preserved over all the long time the object was buried in the ground. There is only a small piece left which belongs to the wooden handle of the dagger. The exact place of this discovery is undisclosed.


The following technical indications are medial values. During operation small variations are quite possible.

Control unit

Operating temperature   0 ░C - 70 ░C
Storage temperature   -20 ░C - 60 ░C
Air humidity   5 % - 75 %
Waterproof   No
Dimensions (H x W x D)   430 x 150 x 260 mm
Weight   about 3 kg
Voltage   9,6 - 14,4 VDC, 22 W maximum
Safety class   IP40
Operating time (delivered power supply full charged, 25░C)   approx. 3 hours
Display   300mcd backlight, 6.4" diagonal, 640 x 480 Pixel TFT, Color
Processor   600 MHz, INTEL i586-compatible
Working memory   256 MB RAM
Data memory   256 MB
Feedback   audible, visual

Data transmission (USB)

Technology   USB
Maximum Transfer Rate   19200 Baud

Computer, minimum requirements

CD-ROM drive   minimum 4x
Interface (Data transmission)   USB
Free disk space   minimum 50 MB
Working memory (RAM)   minimum 256 MB
Graphic card   minimum 128 MB, OpenGL-compatible
Processor   minimum 1.2 GHz
Operating system   Windows XP, Windows Vista, Windows 7, Windows 8


In the following table you can see the complete delivery contents and all optional accessories.
The used symbols have the following signification:

x times includedx   = x times included   not included   = not included   optional available, only for additional charge   = optional available, only for additional charge

Description Basic Gold Pro
3D software ( "Visualizer 3D" ) with data cable Yes1 Yes1 Yes1
Control unit Yes1 Yes1 Yes1
GPR-antenna ( 25cm ) Yes1 Yes1 Yes1
Headphones Yes1 Yes1 Yes1
Joystick Yes1 Yes1 Yes1
Power Pack incl. charger and travel adapter Yes1 Yes2 Yes1
Telescopic rod assembly Yes1 Yes1 Yes1
User's manual Yes1 Yes1 Yes1
Waterproof and shock resistant Peli case Yes1 Yes1 Yes2
Antenna for tunnel detection Optional Optional Yes1
DDV, Disc Detector Visualization System Optional Yes1 Yes1
FS-Thermoscan Optional Optional Yes1
GPR-antenna ( 100cm ) Optional Optional Yes1
GPR-antenna ( 50cm ) Optional Optional Yes1
GPR-antenna ( 75cm ) Optional Optional Yes1
Super sensor Optional Yes1 Yes1

Are you looking for gold? We have the right metal detector for you!
Call us!


Phone: +49 (0)3447 4993000       E-Mail: info@okm-gmbh.de

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