Made in Germany   Made in Germany   Detection Technologies since 1998

Comparison of OKM's water and cavity detectors

The name GeoSeeker stands for water detection as well as cavity detection. Both detectors are utilizing geoelectrical principles to measure the resistivity of the underground soil. According to the Schlumberger procedure four electrodes are placed into the ground to determine its resistivity.

OKM GeoSeeker Mini
OKM GeoSeeker Mini
Geoelectrical water and cavity detector for up to 100 m (328 ft) depth penetration.
OKM GeoSeeker
OKM GeoSeeker
Geoelectrical water and cavity detector for up to 250 m (820 ft) depth penetration.

Both, the OKM GeoSeeker as well as the OKM GeoSeeker Mini, are utilizing two electrodes to inject electrical power into the underground soil, whereas two additional electrodes are measuring the potential difference (fall of voltage) at specific scan points to calculate the final resistivity value.

GeoSeeker Feature Matrix

The following table compares the features of both detectors:

OKM GeoSeeker MiniOKM GeoSeeker
Maximum Depth100 m (328 ft)250 m (820 ft)
Total Weight14 kg35 kg
Data VisualizationData values on screen,
2D scan images
Data values on screen,
3D scan images
Active ScanYesYes
Passive ScanNoYes
Quick ScanNoYes
Maximum Voltage Output320 V390 V
Display / OperationEmbedded TouchscreenAndroid Tablet-PC (WiFi)
Operation Timeapprox. 8 hoursapprox. 16 hours
Power SupplyExternal OKM Power Pack
(12.7 V, 4.4 Ah)
Internal Lead Acid Battery
(2 x 12 V, 10 Ah)
Memory Capacity4 measurementsUnlimited,
depending on Android's free memory

Both geoelectrical detectors are able to detect underground objects and structures like:

  • underground water deposits
    • ground water
    • fresh water, drinking water
    • underground watercourse, water veins
  • hidden cavities
    • tunnels, galleries
    • caves, chambers, sepulchers, tombs
  • impervious layers and barriers

For additional questions concerning our water and cavity detectors you may contact your local distributor or our sales and support team.


  GeoSeeker - User's Manual (English)
  GeoSeeker Mini - User's Manual (English)

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
DescriptionGeoSeeker MiniGeoSeeker
Control unit with touch screenYes1No
ElectrodeYes4Yes4
Extension Cable ( 2 m )Yes2Yes2
Power Cable Drum ( Ø 290 mm )Yes2Yes2
Power Pack incl. charger and travel adapterYes1Yes1
User's manualYes1Yes1
Voltage Cable ( 10 m )Yes2No
AA battery 1.5 VNoYes8
Android Tablet PCNoYes1
Charger for ControllerNoYes1
Charger for Power BoxNoYes1
ControllerNoYes1
Holder for Tablet PCNoYes1
Power BoxNoYes1
Voltage Cable Drum ( Ø 120 mm )NoYes2

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