Made in Germany   Made in Germany   Detection Technologies since 1998

We don't manufacture this product anymore.
We recommend the eXp 4500 - Professional as replacement.

eXp 4000 - metal detector and 3d ground scanner

The Earth Imagers 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 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.

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.

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 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 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 some relevant discoveries, which have been located. If you also made a discovery or know somebody who made a fantastic find with our metal detectors, just write us an email or use our online form!

A happy owner of an OKM eXp 4000 3D ground scanner detected some amazing, ancient, well preserved gold figures and seal stamps in 1,5 m depth.

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?

Mexico is well known for its hidden treasures. Besides the famous ruins of Tenochtitla, an ancient aztec-city, or Chichen-Itza, a historic mayan-city, there are a lot of gold and silver treasures buried deep under the Mexican ground. The search for the lost treasures was a big adventure for one of our customers too, which was worth the trouble. The treasure hunter detected an ancient treasure chest with valuable contents by using the eXp 4000 ground scanner and 3d metal detector. The coin treasure which was hidden in the chest has been detected in a depth of about 1.5 meters. A highlight for every treasure hunter.

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.

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.

  eXp 4000 - Brochure (English)

File: eXp4000_EN.pdf
Size: 503.58 KB

  eXp 4000 - Prospekt (Deutsch)

File: eXp4000_DE.pdf
Size: 655.81 KB

  eXp 4000 - User's Manual (english)
  eXp 4000 - Benutzerhandbuch (deutsch)

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
3D software ( "Visualizer 3D" ) with data cableYes1Yes1Yes1
Control unitYes1Yes1Yes1
GPR-antenna ( 25cm )Yes1Yes1Yes1
Power Pack incl. charger and travel adapterYes1Yes2Yes1
Telescopic rod assemblyYes1Yes1Yes1
User's manualYes1Yes1Yes1
Waterproof and shock resistant Peli caseYes1Yes1Yes2
Antenna for tunnel detectionOptionalOptionalYes1
DDV, Disc Detector Visualization SystemOptionalYes1Yes1
GPR-antenna ( 100cm )OptionalOptionalYes1
GPR-antenna ( 50cm )OptionalOptionalYes1
GPR-antenna ( 75cm )OptionalOptionalYes1
Super sensorOptionalYes1Yes1

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 %
Dimensions (H x W x D)
430 x 150 x 260 mm
about 3 kg
9,6 - 14,4 VDC, 22 W maximum
Safety class
Operating time (delivered power supply full charged, 25°C)
approx. 3 hours
300mcd backlight, 6.4" diagonal, 640 x 480 Pixel TFT, Color
600 MHz, INTEL i586-compatible
Working memory
256 MB RAM
Data memory
256 MB
audible, visual

Data transmission (USB)

Maximum Transfer Rate
19200 Baud

Computer, minimum requirements

CD-ROM drive
minimum 4x
Interface (Data transmission)
Free disk space
minimum 50 MB
Working memory (RAM)
minimum 256 MB
Graphic card
minimum 128 MB, OpenGL-compatible
minimum 1.2 GHz
Operating system
Windows Vista, Windows 7, Windows 8, Windows 10

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