Nokta SX24 9.5x6" DD Coil - Enhanced Coverage for Findx Pro and Simplex Series

The Nokta SX24 9.5x6" DD coil is engineered for seamless compatibility with the entire Nokta Simplex series—including the Simplex LITE, Simplex BT, and Simplex ULTRA—as well as the FindX Pro detector. It features a straightforward, plug-and-play connector that mounts cleanly using the included hardware. No firmware updates or complicated calibration steps are required; simply hook up the coil, power on your detector, and you are ready to begin treasure hunting.

The main advantage of the SX24 coil is its modified semi-elliptical shape and Double-D configuration. Its 9.5x6" footprint offers an efficient blend of surface coverage and target separation. Compared to standard configurations, this design provides a distinct depth advantage, allowing you to pull targets from deep below the standard sweep zone. It covers open ground quickly while maintaining enough maneuverability to navigate around tight obstacles where larger round coils struggle.

The SX24 coil is is fully waterproof and completely submersible. It is built to perform reliably in harsh environments, making it an excellent choice for hunting on saltwater beaches, wet sand, and freshwater streams. The package also includes a form-fitting, protective coil cover that shields the underside from the constant scrapes and abrasions encountered when dragging the coil across rough gravel, rocks, or shell hash

The SX24 coil package includes the 9.5x6" DD search coil, a protective coil cover, and all mounting hardware needed for installation on Simplex-series detectors. The coil cover is a rubberized shield that prevents scratches and wear on the coil's bottom surface, and it's pre-installed on the coil when it ships. The mounting hardware includes the bolt and washers that secure the coil to the detector's lower shaft. You don't need any additional accessories or adapters to start using the coil; everything required for a complete installation is in the box.

The SX24's DD (Double-D) configuration offers superior ground-balancing performance in mineralized soil compared to concentric coils. The DD pattern cancels ground signals more effectively, which reduces false signals and chatter in iron-rich dirt, red clay, and wet saltwater sand. Concentric coils amplify mineralization noise because their circular field interacts with a larger volume of ground; the DD coil's overlapping windings create a narrower detection field that samples less ground per sweep. If you're hunting relic sites with hot rocks or beaches with black sand, the SX24 will run quieter and more stable than a concentric coil of the same size. For more on how coil geometry affects performance, see our guide to metal detector technologies.

The SX24 coil works for relic hunting in trashy sites, but its larger size means it's better suited to open relic ground with moderate trash density rather than iron-choked homesteads. The 9.5x6" footprint still fits between foundation stones and around fence posts, but if you're working a site with nail scatter every few inches, a smaller coil will give you better target separation. The depth advantage of the SX24 shines when you're hunting large relics like artillery shells, buttons, and buckles that sit 10-12 inches down in mineralized soil. We use this coil in Civil War camps and old farmsteads where the trash has been worked over and the remaining targets are deep. For dense iron, consider smaller coils in the 5-6 inch range.

The SX24 coil's weight is not specified in the manufacturer documentation, but the 9.5x6" semi-elliptical design is noticeably heavier than the stock Simplex coil due to its larger size and DD winding configuration. The added weight is most noticeable during long hunts when you're swinging the coil for several hours. Most detectorists find the weight manageable, and the depth and coverage gains outweigh the fatigue tradeoff. If arm fatigue is a concern, consider using a detector harness or adjusting your swing technique to reduce strain. The coil's balance point is close to the mounting bolt, which helps minimize tip-heavy feel.

The SX24 coil does not require firmware updates or special settings on Simplex-series detectors. The detector recognizes the coil automatically when you power on, and you can run your normal sensitivity, discrimination, and ground-balance settings without adjustment. Some detectorists increase sensitivity by one or two notches to take full advantage of the coil's depth capability, but this is optional and depends on ground conditions. The coil's DD configuration may let you run higher sensitivity in mineralized ground compared to the stock coil, since the DD pattern reduces ground noise. Start with your usual settings and adjust based on what you hear in the field. For guidance on optimizing Nokta detectors for different hunting scenarios, our team can walk you through field-tested configurations.