Nokta IM19 7.5 x 4 inch Waterproof DD Coil for Impact Metal Detector

The Nokta IM19 7.5x4 coil is engineered and designed specifically for the Nokta Impact metal detector. The coil's connector configuration and mounting footprint are optimized to match the Impact setup directly. To ensure performance and system stability, it should be used as a direct plug-and-play upgrade or replacement explicitly for the Impact model.

The Nokta IM19 coil is fully waterproof making it ideal for beach detecting, shallow water wading, and hunting in rainy or muddy conditions. While the sealed search coil can be completely submerged in water or surf zones, operators should always check their specific detector user manual regarding the water-resistance limits of the main control box housing on the metal detector.

The Double-D (DD) configuration provides superior ground balancing capabilities, especially when working through highly mineralized soil or challenging beach environments. The DD design reduces ground noise and interference, resulting in cleaner target signals. This allows detectorists to achieve clearer target separation when hunting for coins and relics in trash-heavy or iron-scattered sites.

The IM19's elliptical 7.5x4-inch footprint allows maneuvering between playground equipment, fence posts, foundation corners, and other obstacles. The narrow 4-inch width isolates individual targets in trash-dense zones by reducing the number of objects inside the detection field during each swing. When you sweep the IM19 over a nail bed with a coin nearby, the smaller footprint separates the coin's signal from the surrounding iron, giving you a repeatable target ID instead of an averaged mixed signal. The 7.5-inch length maintains reasonable ground coverage, so you don't sacrifice too much search speed for the added maneuverability.

The Nokta IM19 coil provides effective depth on coin-sized targets in moderate soil conditions. Actual depth performance varies with soil mineralization, target orientation, and the Impact's sensitivity setting. In highly mineralized ground or saltwater wet sand, expect reduced depth compared to neutral soil. The IM19 is optimized for target separation and small-target sensitivity rather than maximum depth, so if your primary goal is deep silver in open fields, a larger coil may be preferable. For trashy parks, relic sites with iron scatter, and beach hunting where target separation matters, the IM19's performance profile fits the task.

The Nokta IM19 coil ships with a protective coil cover and all necessary mounting hardware in the package. The protective coil cover shields the coil's bottom surface from abrasion when you sweep over rocks, gravel, pavement, and roots. Using the cover extends coil life and prevents scratches that can eventually compromise the waterproof seal. The mounting hardware needed to attach the IM19 to the Impact's lower rod is included, so you can install the coil without additional parts. Keep the cover installed during field use and remove it only for cleaning or inspection.

The IM19 coil's waterproof construction and DD configuration make it effective for saltwater surf-zone detecting when used with the Nokta Impact. The DD field pattern reduces ground noise from conductive wet sand and salt mineralization, allowing stable threshold and target ID at moderate sensitivity settings. The IM19 handles the transition from dry sand to wet sand without constant ground-balance adjustments, and the narrow profile cuts through shell debris and seaweed to isolate rings and coins. The coil can be fully submerged in surf. Consult your Impact manual for control box specifications regarding water exposure.

The IM19 coil excels in scenarios where target separation and maneuverability are priorities. Trashy urban parks with high concentrations of aluminum pull-tabs, bottle caps, and foil wrappers benefit from the IM19's narrow footprint, which isolates individual coins from surrounding junk. Relic sites with dense iron scatter, colonial homesites, Civil War camps, old farmsteads, favor the DD configuration's ability to reject broad iron signals while preserving response to small high-conductors like buttons and bullets. Beach hunters working the wet-sand zone and shallow surf gain from the IM19's waterproof rating and reduced salt interference.