Metal detectors work by generating an electromagnetic field (transmitter coil) and analyzing its disturbances (receiver coil). When metal enters the field, it creates eddy currents that alter the return signal.
Core Technology Explained
- Electromagnetic Field Principle
- Transmitter coil generates a magnetic field
- Metal objects create eddy currents that distort the field
- Receiver coil detects these distortions
- Signal Processing
- Advanced algorithms analyze:
- Conductivity (identifies metal type)
- Phase shift (determines depth)
- Advanced algorithms analyze:
Detection Technologies Compared
Type | Best For | Depth Range |
---|---|---|
VLF | Gold nuggets, coin shooting | 0.5-1.5m |
PI | Saltwater beaches, relics | 1-4m+ |
Multi-IQ | All-terrain versatility | 0.3-2m |
Scientific Applications
- Archaeology: Non-invasive site surveying
- Security: Concealed weapon detection (airports)
- Industrial: Rebar location in concrete
Pro Performance Tips
✔ Frequency Selection:
- 3-10 kHz → Deep gold
- 15-100 kHz → Shallow coins
✔ Ground Balance:
- Manual (expert mode)
- Automatic (beginner friendly)
Black Dog Tech Innovations
- HoundSense AI: Learns your hunting patterns
- GeoFilter Mode: Ignores common junk metals
Did You Know?
The first metal detector (1881) found a bullet in President Garfield!
Visual Guide Recommendations:
- Infographic: “Signal Path from Coil to Display”
- Video: Side-by-side comparison of VLF vs PI
Want deeper technical specs? Ask about:
- Phase shift calculations
- Soil mineralization charts
- Military-grade waterproofing tests
Perfect for:
- Product education pages
- STEM blog content
- Trade show displays
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