Fisher Impulse AQ Limited — quick verdict
The Fisher Impulse AQ Limited is a premium-tier Pulse Induction metal detector from Fisher, aimed at beach, surf and shallow-water hunting, gold jewelry in wet salt sand, volcanic/black-sand beaches detecting. Standout: Adjustable pulse delay (7-11.5 us).
Overview
The Fisher Impulse AQ Limited is a premium-tier Pulse Induction metal detector from Fisher, aimed at beach, surf and shallow-water hunting, gold jewelry in wet salt sand, volcanic/black-sand beaches detecting. It runs at Pulse Induction. Weighing 4.2 lbs, plan for arm fatigue on long sessions. Below: every spec verified against the manufacturer's own pages, with sources.
Full Specifications
| Brand | Fisher |
| Technology | Pulse Induction |
| Frequencies | Pulse Induction |
| Weight | 4.2 lbs |
| Waterproof | Waterproof housing rated to 3 ft |
| Coil | 12.5-inch waterproof mono |
| Best for | Beach, surf and shallow-water hunting, gold jewelry in wet salt sand, volcanic/black-sand beaches |
| Price tier | Premium |
Verified against manufacturer pages, October 2026. Fields marked "not published" are absent from official sources — we never fill them from retailers.
How It Fits the Lineup
The Fisher Impulse AQ Limited sits in Fisher's lineup alongside Fisher F44, Fisher F75, Fisher Gold Bug 2, Fisher F22. It uses Pulse induction (PI) — firing powerful magnetic pulses and measuring how fast the field decays. PI ignores salt and heavy mineralization and goes very deep — but discriminates poorly, so you dig more trash. The choice for goldfields and extreme beach depth. Compare it against its intended competition in our guides to the best beach metal detectors, best gold prospecting detectors, and see how Fisher's range stacks up on the Fisher brand page.
Key Features
- Adjustable pulse delay (7-11.5 us)
- Volcanic Sand mode; All Metal, Tone and Mute modes
- Rechargeable NiMH battery (up to 3.5 hours)
Sources
Frequently Asked Questions
What is the Fisher Impulse AQ Limited best for?
The Fisher Impulse AQ Limited is best for beach, surf and shallow-water hunting, gold jewelry in wet salt sand, volcanic/black-sand beaches detecting. Key strengths: adjustable pulse delay (7-11.5 us).
What frequency does the Fisher Impulse AQ Limited use?
Pulse Induction
Is the Fisher Impulse AQ Limited waterproof?
Waterproof housing rated to 3 ft
How much does the Fisher Impulse AQ Limited weigh?
4.2 lbs
Where can I buy the Fisher Impulse AQ Limited?
Through authorized dealers and on Amazon — check current availability via the link below. DetectorLab may earn a commission (see disclosure).
Honest Limitations
The Fisher Impulse AQ Limited is a strong pick for beach, surf and shallow-water hunting, gold jewelry in wet salt sand, volcanic/black-sand beaches detecting, but no machine is universal. Check the waterproof line before any water use, confirm the weight against your stamina, and remember that ground conditions affect real-world performance more than any spec number.