Nokta SP35 13.5 x 12.5 inch DD Search Coil for Simplex+

The SP35 13.5" x 12.5" coil is compatible exclusively with the Nokta Simplex+ metal detector. The coil is designed for Simplex+ compatibility and will not physically attach to other Nokta models like the Legend, Anfibio, or Impact. The integrated cable features a compatible connector that works only with the Simplex+ control box. This coil maintains the same waterproof rating as your Simplex+ detector and includes all necessary mounting hardware for secure attachment to the lower shaft. If you own a different Nokta detector, browse our full selection of metal detector search coils: dd, concentric, monoloop & sef upgrades to find compatible options for your model.

To use the Nokta SP35 DD coil, your Nokta Simplex+ metal detector must be updated to software version 2.76 or higher. If your machine is running older factory firmware, the detector will not recognize the new hardware. Updating your device is simple: connect your control box to a computer using your USB charging cable and download the latest update package directly from the official manufacturer portal before heading out into the field.

The SP35 coil is fully waterproof and maintains the Nokta Simplex+ detector's submersible rating, so you can hunt in surf, shallow rivers, creeks, and freshwater lakes without risk of water intrusion. The waterproof construction allows you to use the coil in wet conditions with confidence, whether you're wading in freshwater streams or hunting along saltwater beaches. As a general best practice for any waterproof detector equipment, rinsing the coil and connector with fresh water after saltwater exposure helps maintain optimal performance and extends the life of electrical connections. The SP35's sealed design ensures reliable operation in all the wet hunting environments where the Simplex+ excels.

No, the Nokta SP35 searchcoil is engineered exclusively for the 1st Generation Nokta Simplex+ and Simplex+ WHP detectors. It features a specific pin configuration and internal calibration intended only for those legacy units. If you own a newer model from the Next Generation series, you will need to browse our specialized collection of Metal Detector Search Coils to find the compatible SX35 variant, which is tailored specifically for the Lite, BT, and Ultra control systems.

Because the SP35 expands your footprint to 13.5" x 12.5", it provides a significant boost in absolute target depth on medium-to-large objects like relics and deep coin caches. While exact depth varies based on soil mineralization and settings, field tests show a notable increase in clean signals on deep targets that standard 11-inch coils miss entirely. It also scales up your ground coverage, enabling you to sweep wide-open spaces like beaches and pastures far more efficiently.

The SP35 ships with all necessary mounting hardware, including the lower shaft bolt, washers, and lock nut required to attach the coil to your Simplex+ detector's lower shaft. Installation is straightforward: you remove the stock coil by loosening the existing bolt, slide the SP35's mounting bracket onto the lower shaft, align the holes, insert the new bolt, and tighten the lock nut until snug. The integrated cable routes up the shaft and connects to the Simplex+ control box. The cable features a coiled design to prevent snagging during use. If you've swapped a coil on any detector before, the process is identical and requires only basic hand tools.