OKM Gepard GPR 3D Metal Detector with Ground Penetrating Radar

The OKM Gepard GPR 3D is a ground penetrating radar for locating underground objects and structures such as pipelines, cables, conduits, cavities, tunnels, bunkers and foundations. Its omnidirectional, unshielded antennas transmit from 60 MHz to 300 MHz, the radar sends a signal into the ground and waits for the reflection, and an Android tablet shows the results as you survey. OKM gives a maximum depth of up to 40 m (131 ft). One person can run the system.

What is in the box with the OKM Gepard GPR

OKM's standard contents for the Gepard GPR 3D

• Gepard GPR 3D control unit
• Android tablet
• Two telescopic shafts
• Sending antenna for Gepard GPR 3D
• Receiving antenna for Gepard GPR 3D
• USB flash drive with OKM Visualizer 3D Studio Professional Edition
• Power pack
• Bluetooth headphones with charging cable
• Charger with charging cable
• Travel adapter set
• Waterproof and shock-resistant protector case
• Quick start guide

What the Gepard looks for

OKM lists these as detectable objects and structures:

• Underground walls, basements and concrete reinforcements
• Hidden cavities, graves and sepulchers
• Water level, underground rivers and aquifers
• Buried pipelines, conduits and cable harnesses
• Backfilled wells, galleries, trenches and dugouts
• Septic tanks, distribution boxes and drainage pipes
• Tunnels, bunkers and shelters
• Buried chests, statues and caches

Survey setup and the Android app

The telescopic antennas set the transmission frequency between 60 and 300 MHz, and the Gepard makes a number of automatic adjustments for the soil type, so you mainly set the depth resolution and start surveying. Measurement data goes to the Android tablet over a USB-C cable and appears on screen right away. The app can add a GPS position or Google Maps to each scan, filter the data automatically to make objects and structures easier to pick out, and store notes for later.

Who the OKM Gepard GPR suits

What interests us about the Gepard is that it uses ground penetrating radar rather than conventional VLF metal detection or magnetic scanning. It sends radar pulses into the ground and measures the reflections, which suits customers who specifically need a radar system for buried foundations, voids and changes in subsurface materials.

What the radar shows

Picture an older property where a buried foundation may exist. Changes in underground materials reflect the radar signal, and those reflections can point to possible structures or other anomalies. The Gepard does not identify what caused a reflection, and interpreting radargrams takes training.

Soil decides how deep the Gepard reads

GPR performance depends heavily on ground conductivity. Dry, relatively resistive ground generally allows better penetration. Wet clay and highly conductive soils can cut penetration sharply. OKM quotes depths of up to 40 m (131 ft); we treat that as a maximum, not a guaranteed detection depth. Usable depth depends on soil conditions, antenna setup, target size and the resolution you need.

One mistake to avoid with the Gepard GPR

Assuming GPR produces photographs of underground objects. It measures radar reflections. A related mistake is expecting it to identify gold; radar does not determine what an object is made of.

Our recommendation on the OKM Gepard GPR

We recommend the Gepard to customers who specifically need ground penetrating radar. Its strongest point is radar based subsurface investigation rather than conventional metal detection.

Permission and protected sites

We would get the landowner's permission before any survey and check the laws that protect historic sites, archaeological sites and burials where you plan to scan. A ground scanner can show where something is different underground; it does not tell you whether you may dig there.

OKM Gepard GPR specifications

OKM covers the Gepard GPR with a 2-year warranty. Serious Detecting is an authorized OKM dealer, and we can help you set up the tablet and software before your first survey.

Every OKM detector and ground scanner we carry is in our OKM collection, and our 3D imaging metal detectors collection compares ground scanners across brands.