https://cdn.seriousdetecting.com/wp-content/uploads/2019/04/seriousdetectinglogo.gif 0 0 Ewout Kozel https://cdn.seriousdetecting.com/wp-content/uploads/2019/04/seriousdetectinglogo.gif Ewout Kozel2016-07-15 10:12:442017-06-13 11:29:09Metal Detector Double-D Search Coils (DD) Explained
What are DD coils?
A Double-D coil has two overlapping wire windings in the shape of two D’s. The benefits of a Double-D coil are stability (especially in heavily mineralized ground), good depth, sensitivity and a very thorough search pattern requiring less overlap.
When used with GPX detectors, Double-D coils (unlike Mono loop coils) are able to discriminate between ferrous and non-ferrous targets when Iron Reject is activated. They are also more stable when used on wet salt beach sand and in electrically noisy environments.
When used with X-TERRA detectors, Double-D coils perform quieter than Concentric coils in mineralised ground and are therefore well suited for gold prospecting.