What is a DD coil?
A double D coil has two overlapping wire windings in the shape of two D’s, this sends out a signal centralised to the coil in a blade or chisel type pattern. The Double-D configuration provides good stability, great depth, superior ground balancing and an expanded search pattern that requires less overlap.
What is a metal detector coil made of?
The most common type of metal detector is a hand-held metal detector or coil-based detectors using oval-shaped disks with built-in copper coils. The search coil works as sensing probe and must be moved over the ground to detect potential metal targets buried underground.
Where are Detech coils made?
Welcome to Detech USA! Detech USA is proud to be a progressive website specializing in products created and developed by Detech of Bulgaria specifically for the metal detecting industry.
What are concentric coils?
The concentric coil puts out a snow cone-shaped field (shaped like a snow cone), the DD field is more like the “knife blade” of the concentric (shaped like an I). The DD coil separates much better and gets more even depth especially in mineralized ground.
What does notch mean on a metal detector?
NOTCH: Provides an adjustable rejection “window” to eliminate undesirable metals from detection. Move the rejection “window” with the DISC/NOTCH knob. AUTO NOTCH: Provides a pre-set rejection “window”, automatically eliminating most pull-tabs and trash items from detection.
What are the different types of metal detector coils?
Some of the basic coil types: The most common description for metal detector coils are: concentric, elliptical, and Double D. Concentric Coil. A concentric coil is probably the most commonly used coil.
What is a pulse induction metal detector?
This type of detector technology is different. Instead of using two, separate coils, a Pulse Induction metal detector uses one coil that both transmits and receives electrical currents. These currents are released in pulses with anywhere between 100 to several hundred pulses in a second.
What type of metal detector should I buy?
If you had to pick one type of metal detector, a safe bet would be the multi-frequency metal detector. Metal detector technology, frequency, user settings, and searchcoil diameter and physics all affect how a metal detector can and will perform.
Are Double-D search coils more effective than concentric coils?
Even though the Double-D search coil seems to have more advantages over the concentric coil, its performance, as performance of a search coil of any type, depends on the operating frequency of a metal detector. For example, the gold nugget detectors operate on high frequencies up to 70 kHz to detect the smallest grains of gold.
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