OKM Gepard GPR 3D Overview
A metal detector reacts to metal. The OKM Gepard GPR 3D is radar: it sends a signal into the ground and records the reflection, so it shows where the ground changes, whether that change is a wall, a void, a pipe or a buried object. OKM gives it two operating modes: 3D Ground Scan, which builds a 3D picture from a series of passes, and 2D Radargram, a cross-section view of the echoes along one line.
The Gepard uses two triangular, unshielded antennas, one sending and one receiving, on telescopic shafts. Each antenna weighs 1.5 kg (3.3 lb) and measures 1010 x 330 x 50 mm (about 40 x 13 x 2 inch); each shaft weighs 0.8 kg (1.8 lb) and carries its own 7.26 V, 2600 mAh battery. The control unit weighs about 1.6 kg (3.5 lb), runs about 4 hours, and sends its data over a USB-C cable to the supplied Android tablet. OKM rates the control unit, shafts and antennas IP20, lists them as not waterproof, and gives an operating range of -20 to 55 °C (-4 to 131 °F). OKM covers the Gepard with a 2-year guarantee.
Gepard GPR vs GeoSeeker: Which Should You Buy?
Both find things that are not metal, and they measure different things. The Gepard GPR records radar echoes, so it shows the shape and position of structures such as walls, cellars, tunnels, pipes and backfilled wells, in 3D or as a cross-section. The GeoSeeker reads the electrical resistivity of the ground through electrodes, so it shows water-bearing layers as low-resistance zones and cavities as high-resistance zones, to much greater depth. If your question is what structure is down there, we recommend the Gepard. If your question is where to drill for water, choose the GeoSeeker.
Gepard GPR 3D, Best For:
- Suspected tunnels, cellars, bunkers and backfilled wells
- Locating foundations, pipelines and cables before digging
- Large buried objects where the target may not be metal at all
Key Features in the Field
Changing the antenna length sets the transmission frequency between 60 and 300 MHz. In ground-penetrating radar, depth and detail trade against each other: lower frequencies generally reach deeper with less detail, and higher frequencies show more detail at shallower depth. OKM says the unit also makes automatic adjustments for specific soil types.
The tablet shows the data on screen as you go. The app can add a GPS position or a map to each scan, filter automatically and store notes, so scan positions are saved with the data. Scans then open in Visualizer 3D Studio Professional Edition, which comes on a USB flash drive in the kit.
OKM's depth figure is up to 40 m (131 ft), and OKM adds that customers have found objects down to that depth. OKM does not state soil or target conditions for it, so read it as a maximum. Our guide to how deep metal detectors go covers why one depth number never fits every site.
Where It Works Best and Its Limits
OKM lists underground walls and basements, cavities, graves, water levels and aquifers, pipelines and cables, backfilled wells and trenches, septic tanks, tunnels and bunkers, and buried chests and caches as detectable. The Gepard is a survey tool, and like any radar it takes practice to read a radargram correctly. Customers who mainly want to find coins, rings or relics are better served by a conventional metal detector, which does that faster and for a fraction of the cost. If the target is metal, an OKM 3D ground scanner such as the OKM Fusion series, the OKM Rover series or the OKM Evolution NTX gives a clearer answer. Our metal detector technologies guide explains how VLF and pulse induction detectors work, for comparison.
What Comes with the Gepard GPR 3D
OKM's standard Gepard kit holds the control unit, an Android tablet, two telescopic shafts, the sending and receiving antennas, Bluetooth headphones with charging cable, a charger, a travel adapter set, a waterproof and shock-resistant protector case, a quick start guide and a USB flash drive with Visualizer 3D Studio Professional Edition. OKM offers a pre-configured Windows notebook as an option, along with detector training, 3D software training, scan analysis and remote support. See the Gepard GPR 3D listing for what we supply.
Compare OKM Radar and Water Detectors
| Feature | Gepard GPR 3D | GeoSeeker |
|---|
| Method | Ground-penetrating radar, 60 to 300 MHz | Geoelectric resistivity |
| What it finds | Structures, cavities, pipes and large objects, metal or not | Groundwater, water-bearing gravel and cavities; no metal |
| Depth OKM gives | Up to 40 m (131 ft) | 5 to 250 m (16 to 820 ft) in Active Scan |
| Modes | 3D Ground Scan, 2D Radargram | Active Scan (Accurate), Active Scan (Quick), Passive Scan |
| Control and results | Supplied Android tablet, live display | Supplied Android tablet, 3D results |
| Software | Visualizer 3D Studio Professional Edition | Visualizer 3D Studio Professional Edition |
| Operating time | Control unit about 4 hours | Controller at least 16 hours; power box 8 to 100 hours by power level |
| Weight | Control unit about 1.6 kg (3.5 lb); each antenna 1.5 kg (3.3 lb) | Controller 0.6 kg (1.3 lb); power box 15.8 kg (34.8 lb) |
| Warranty | 2 years | 2 years |
Why Buy the OKM Gepard GPR 3D from Serious Detecting?
- Free Shipping on Orders Over $99: Your OKM Gepard GPR 3D ships at no extra cost across the continental US.
- Authorized OKM Dealer: Showroom in Ypsilanti, Michigan, full 2-year manufacturer warranty and product registration support.
- Help Before and After You Buy: Our staff answer setup, software, antenna and Gepard GPR 3D questions by phone or email.
OKMSale Price $27,809.00 Regular Price
