Not available anymore!

Grailfinder - Exploration of tunnels and caves

All of our metal detectors and geophysical detecting instruments are part of the "FS - Future Series", a line of our latest technology to detect buried objects and underground structures. Beside the measuring instruments it includes our 3D software which assures a detailed analysis of the measured results.

Grailfinder: Geoelectric, Ground Scan, Magnetometer
The Grailfinder is a metal detector with integrated geoelectric.

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

Wireless data transmission
Wireless data transmission

Compliance with the CE policies
Compliance with the CE policies

Not available anymore!

The Grailfinder is a combined device including geo-electric and electromagnetic pulse method. It combines the functionalities of Rover C and Cavefinder, so that the device includes the following functionalities:

  • Acoustical magnetometer
  • Graphical ground scans (manual/automatic)
  • Automatic cavity measurement with easy "Yes/No" evaluation
  • Graphical control output to a computer

The Grailfinder includes a magnetometer to locate ferromagnetic metals like iron, nickel and cobalt which are situated near to the surface. With the standard probe or the optional available Super Sensor graphical measurements can be made and evaluated and analysed in the 3D software.

Because of the integrated microprocessor technology ground balance, depth measurement and data storage will be performed automatically by the device. The evaluation of the measured data takes place at the computer where the scanned area can be analyzed in a three-dimensional graphic with the help of the 3D software.

Detection of cavity and tunnels as well as metal location
Graphical representation of a hidden cavity.

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!

Grailfinder detects ancient cellar in France

Grailfinder detects ancient cellar in France

An ancient wine cellar has been located on an old french castle by using the geophysical instrument Grailfinder. This old cave which is estimated from the 15th century by experts and so has an unexpected high historical value, has been located in a depth of 21 meters. Planete Detection IDS has led this professional underground research and located the entrance of this void. By presence of the first french channel TF1 they demonstrated the metal detector Grailfinder, found the cellar and finally went down with the cameramen and discovered 4 big rooms. "It was just wonderful!" so IDS.


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   12 VDC
Processor   Motorola, 4 MHz
Data memory (internal)   about 1500 measured values

Data transmission (Bluetooth)

Technology   Bluetooth
Frequency   2.4 – 2.4835 GHz
Maximum Transfer Rate   1 Mbps
Receiving Sensitivity   -85 dBm
Maximum Range   approx. 100 m

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, Windows 10


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
3D software ( standard ) Yes1
Control chip Yes1
Control unit Yes1
Electrode with cable ( 20m ) Yes4
External power supply with charger and cable ( 12V ) Yes1
Headphones Yes1
Joystick Yes1
Probe Yes1
USB bluetooth dongle Yes1
User's manual Yes1
Waterproof and shock resistant Peli case Yes2
3D software ( "Visualizer 3D" ) Optional
Super sensor Optional

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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