Nokta SX35 13.5x12.5" Waterproof DD Search Coil for Simplex Series and FindX Pro

The SX35 13.5 x 12.5 inch coil is compatible with the Nokta Simplex LITE, Simplex BT, and Simplex ULTRA detectors. The SX35 is designed to work with all three Simplex models and integrates with the Simplex ground balancing system across all variants. The coil's DD configuration provides effective performance with each detector in the series. Explore the full Nokta lineup to compare Simplex models and their accessory ecosystems.

The SX35 provides increased depth on coin-sized targets compared to the standard coil due to its larger 13.5 x 12.5 inch size. The larger coil penetrates deeper into mineralized soil, though depth gain may diminish in highly mineralized ground or wet saltwater sand where ground noise limits sensitivity. Larger targets like cache boxes or relic clusters see greater depth increases in favorable conditions. The actual depth improvement varies based on soil conditions, target size, and mineralization levels in your hunting area.

The SX35 is fully submersible for underwater detecting and handles both saltwater surf zones and freshwater rivers without issue. You can wade into water and hunt wet sand during low tide with confidence. The DD configuration provides effective ground balancing in mineralized beach environments, reducing false positives. Rinse the coil and connector with fresh water after saltwater hunts to prevent long-term corrosion on the cable and mounting hardware.

The larger coil adds noticeable swing weight compared to the standard Simplex coil. Detectorists accustomed to compact coils may experience fatigue during extended hunts, especially when hunting in a standing posture rather than a slow walk. The elliptical shape distributes weight better than round coils of equivalent area, and a padded arm cuff or counterweight shaft extension can offset the balance shift. Plan for shorter hunt sessions or alternate between the SX35 and a lighter coil during all-day outings.

The SX35 struggles in high-density trash sites where multiple objects are closely spaced. The 13.5 x 12.5 inch footprint sees multiple objects simultaneously, and the Simplex firmware cannot isolate individual signals when iron nails, pull tabs, and foil overlap within the coil's detection field. You'll hear blended tones and erratic target IDs rather than clean coin signals. In those environments, smaller coils deliver better target separation and reduce dig frustration. Check the search coils catalog for compact options.

The SX35 package includes the 13.5 x 12.5 inch DD search coil, a protective coil cover, and includes all necessary mounting hardware with bolts and washers. The coil cover is a wear skid that protects the coil底面 from rocks and abrasive sand during ground contact. The mounting hardware fits the Simplex lower shaft. The coil ships pre-wired and ready to connect to your Simplex detector's lower rod.

The SX35's elliptical 13.5 x 12.5 inch geometry offers better maneuverability around obstacles like fence posts, tree roots, and beach debris compared to a 13 inch round coil of similar detection area. The narrower 12.5 inch width fits between tight spaces while the 13.5 inch length maintains forward sweep coverage. The elliptical design navigates between obstacles better than round coils while maintaining excellent depth performance, making it ideal for beaches, parks, and fields with scattered obstructions.

The SX35 is optimized for larger targets rather than small gold jewelry. The larger coil size increases depth on medium to large targets but is not specifically designed for detecting very small items. For dedicated gold jewelry hunting in challenging conditions, smaller coils typically provide better pinpoint accuracy. Explore detector technologies to learn more about equipment optimized for different target types and hunting conditions.

The SX35 is designed specifically for Simplex series detectors and will not work with Nokta detectors outside the Simplex series like the Anfibio, Impact, or Legend. Each Nokta detector series has dedicated coil options engineered for that platform's electronics. The SX35 is compatible only with the Nokta Simplex LITE, Simplex BT, and Simplex ULTRA models. Browse metal detector search coils to find compatible upgrades for your specific Nokta model.

When switching to the SX35, you may need to adjust your ground balance settings in your hunting area, as the larger coil may read mineralization differently than the standard coil. You may need to reduce sensitivity in mineralized ground to compensate for increased ground noise the larger coil can amplify. Discrimination and tone settings typically transfer from your standard coil profile. Experiment with settings in your specific hunting environment to optimize performance with the larger coil.

The SX35 13.5 x 12.5 inch coil is compatible with the Nokta FindX Pro in addition to all Simplex series detectors. The wired connection and mounting hardware included in the package fit the FindX Pro control box without modification. This compatibility gives FindX Pro users the same ground coverage and depth advantages that Simplex operators gain when upgrading from their stock coil.

The SX35 is fully submersible and handles rain-soaked fields, wet grass, and puddles without issue. The waterproof rating matches the Simplex body rating, so you can hunt through weather conditions that would damage non-waterproof coils. The coil cover included in the package protects the housing from abrasion when dragging through mud and gravel.

The SX35 uses DD (Double-D) technology that transmits and receives signals in overlapping patterns, reducing false signals from mineralized ground. This configuration helps maintain stable operation in iron-rich farm fields and volcanic beach sand where concentric coils produce excessive ground noise. Run moderate sensitivity in hot soil, as the larger coil size amplifies ground mineralization compared to smaller coils, and explore more metal detecting tips in our resource library.

The SX35 adds noticeable swing weight compared to the standard Simplex coil due to its larger 13.5 x 12.5 inch footprint. The increased mass requires more arm and shoulder endurance during extended hunts, particularly during four-hour sessions in open fields. Detectorists new to large coils should plan shorter initial outings to build stamina before committing to full-day searches.

The SX35 detects deeper targets that fall below the stock coil's electromagnetic field range, particularly coin-sized objects in the 8 to 12 inch depth zone. The larger footprint also covers ground faster, reducing the chance of walking past targets in wide search patterns. In open parks and beaches, this combination of depth and coverage reveals silver coins and relics the standard coil would miss entirely.

The SX35 installs using the mounting hardware kit included in the package, which contains bolts and washers that secure the coil to the Simplex lower shaft. Align the coil ears with the shaft bracket, insert the bolt through both sides, and tighten until snug without over-torquing. Route the coil cable along the shaft and connect to the control box, then test the connection before heading to the field. Browse additional search coils for other detector platforms.

The SX35 does not require firmware updates on any Simplex series detector or the FindX Pro. The coil uses standard wired communication protocols that all compatible Simplex models recognize automatically upon connection. Simply attach the coil, power on the detector, and perform a ground balance in your hunting area to optimize performance for local soil conditions.

Serious Detecting is an authorized Nokta dealer offering genuine SX35 coils with full manufacturer warranty coverage. Every coil ships with free shipping, a 30-day return window, and a price-match guarantee. The team runs Nokta detectors in the field and answers compatibility questions from direct experience, ensuring you receive authentic products backed by factory support and knowledgeable customer service.