Minelab 10.5" Round DD Waterproof Search Coil for X-TERRA Detectors, 18.75 kHz

This high frequency (18.75 kHz) lightweight water resistant Double-D coil is more sensitive to small gold nuggets and fine jewellery and has excellent ground coverage. Being a Double-D makes it ideal in areas high in ground mineralisation.

X-TERRA Series Coils
X-TERRA detectors are capable of operating at one of three different frequencies; 3 kHz, 7.5 kHz or 18.75 kHz. The operating frequency is determined by the coil being used and affects the detector's performance. Generally, the lower the frequency, the deeper the detector can penetrate the ground.

At low frequencies sensitivity to small low conductive targets is reduced. The higher the frequency, the higher the sensitivity to small targets, however detection depth is reduced.

Operate the detector at 18.75 kHz (high frequency) to find small nuggets and fine jewellery. Operate the detector at 3 kHz or 7.5 kHz (lower frequencies) when searching for coins and relics.