Fisher 8-Inch Open Coil with Tube for Impulse AQ (Waterproof Pulse Induction)

The Fisher 8-inch open coil is a waterproof pulse induction search coil built for the Fisher Impulse AQ metal detector. Impulse AQ owners hunting saltwater beaches, volcanic sand, and mineralized ground gain wider coverage across open areas. The open-frame geometry sheds sand and debris while keeping pulse induction's immunity to saltwater interference, and the included 27-inch tube assembly makes for a field-ready installation right out of the box.

What's Included with the Fisher 8-inch Coil

• Fisher 8-inch open coil for the Impulse AQ
• 27-inch coil rod/tube assembly
• Mounting hardware

Why Impulse AQ Owners Reach for the 8-inch Coil

• Wider sweep coverage reduces the number of passes needed to clear open beach zones and shallow-water hunting areas.
• Deeper target reach on coins, jewelry, and relics in saltwater and volcanic sand, where VLF detectors bog down in ground noise.
• Open-frame construction lets sand and debris pass through, cutting drag in surf zones and wet sand.
• Waterproof design matches the Impulse AQ's submersible rating for fresh and saltwater hunting.
• OEM build quality for long-term reliability and consistent pulse induction performance. See every option in our Open-frame search coils collection.

Wider Coverage in Saltwater and Volcanic Sand Environments

Beach Hunting in Wet Sand and Surf Zones

The 8-inch diameter covers substantial ground per sweep, cutting search time on open beaches and shallow-water zones. The open-frame geometry sheds sand and water through the swing, reducing physical drag when you're working the surf line or wet sand at low tide. Pulse induction ignores saltwater mineralization, so the wider coil holds a stable threshold and target separation even fully submerged. Run the Impulse AQ's sensitivity at your preferred setting without the ground-balance drift that plagues VLF detectors in saltwater. For more on beach technique, see our metal detecting tips and FAQs.

h2>Pairs With the Fisher Impulse AQ

This 8-inch coil is a coverage upgrade for the Fisher Impulse AQ Limited pulse induction detector, which ships with its standard coil. Add the 8-inch open coil when you want to clear open beach faster, or browse the complete Fisher Impulse AQ detector, coils, and accessories lineup to build out your saltwater kit.

Specifications

• Compatibility: Fisher Impulse AQ
• Coil Size: 8 inches
• Coil Type: Open frame
• Coil Rod/Tube Length: 27 inches
• Waterproof: Yes (matches Impulse AQ submersible rating)
• Included: Coil, 27-inch tube, mounting hardware
• Country of Manufacture: USA (Texas)
• Warranty: Fisher manufacturer warranty

Why Buy from Serious Detecting

Serious Detecting is an authorized Fisher dealer, so your 8-inch Impulse AQ coil ships with Fisher's manufacturer warranty and access to Fisher's specialized technical support team in the United States. Our team has field experience with the Fisher Impulse AQ metal detector in saltwater and mineralized ground, and we can answer installation and performance questions before you order. Every order over $99 ships free, and our 30-day return policy and price-match guarantee back your purchase. We stock a full range of coils and Fisher metal detectors for detectorists working challenging ground.