Description
Fisher Gemini-3 Two-Box Metal Detector
Designed for professionals in utility work, geology, and treasure hunting, the Fisher Gemini-3 is a two-box metal detector built for locating large, deeply buried targets. Unlike conventional detectors, the Gemini-3 excels at tracing ore veins, detecting underground tanks, locating pipes and cables, and searching for long-buried cache sites.
Built for Large, Deep Targets
Deep Cache Locating
Built to locate large buried objects such as cache sites, drums, tanks, and other substantial metal targets at serious depth.
Ore Veins and Mineral Deposits
Useful for prospectors and geologists who need to trace ore veins or identify large underground mineralized structures.
Pipes, Cables, and Utilities
Inductive and conductive tracing options make the Gemini-3 useful for locating underground pipes, cables, and utility lines.
V.C.O. Audio Target Response
The Gemini-3 uses Voltage Controlled Oscillator audio target response. As the signal gets stronger, the pitch and volume increase, helping the operator pinpoint large targets more accurately.
This makes it easier to interpret signal strength when searching for large, deeply buried objects in the field.
Four Operating Modes
- Narrow Scan Inductive
- Wide Scan Inductive
- Inductive Trace
- Conductive Trace
These modes give the operator flexibility for searching open ground, tracing buried lines, and adapting to different target types and terrain.
Professional-Grade Purpose
The Gemini-3 is designed for deep-seeking and cache locating of large buried objects, ore veins, pipes, and utilities.
It is a strong fit for prospectors, geologists, treasure hunters, utility companies, and users who need a specialized detector for large targets at depth.
Rugged Field Design
The Gemini-3 features a rugged yet lightweight frame with an ergonomic handle and padded grip for extended use.
Its analog meter, audio response, sensitivity control, and moisture-resistant speaker cone are designed for dependable field operation.
Key Features
RF Induction Technology
Two-box RF induction system designed for large, deep metal targets rather than small coin-sized targets.
Analog Meter
Analog display provides signal-strength feedback while the V.C.O. audio helps with target pinpointing.
Manual Balance Control
Manual balance adjustment allows the operator to fine-tune performance for the conditions.
1/4" Headphone Jack
Standard headphone jack allows use of compatible headphones for clearer signal response in noisy areas.
AA Battery Powered
Uses standard AA batteries for the transmitter and receiver, making field replacement simple.
Not a Standard Coil Detector
The Gemini-3 is a two-box system, so it does not use a normal stock searchcoil like conventional metal detectors.
Fisher Gemini-3 Specifications
| Product | Fisher Gemini-3 Two-Box Metal Detector |
|---|---|
| Manufacturer | First Texas Products, LLC |
| Brand | Fisher Research Labs |
| Country of Origin | USA |
| Purpose | Deep-seeking and cache locating for large buried objects, ore veins, pipes, cables, and utilities |
| Technology | RF Induction / Voltage Controlled Oscillator audio response |
| Frequency | 81.92 kHz crystal controlled |
| Operating Modes | 4 modes: Narrow Scan Inductive, Wide Scan Inductive, Inductive Trace, Conductive Trace |
| Ground Balance | Manual via Balance knob |
| Discrimination | No |
| Target ID / Numeric ID | No |
| Audio | V.C.O.; pitch and volume increase with signal strength |
| Volume | Yes |
| Sensitivity | Yes, adjusted via knob |
| Depth Indicator | No dedicated depth indicator; analog meter indicates signal strength |
| Pinpoint | Yes, via V.C.O. response |
| Memory | No |
| Backlight | No |
| Display | Analog |
| Weatherproof | Moisture-resistant speaker cone; not fully waterproof |
| IP Rating | Not rated |
| Stock Searchcoil | Not applicable; two-box system |
| Headphone Jack | Yes, 1/4" |
| Weight | 7.5 lbs / 3.4 kg complete system |
| Battery Type | 8 AA batteries for transmitter and 8 AA batteries for receiver; alkaline recommended |
| Battery Life | Transmitter: approximately 25 hours; Receiver: approximately 30 hours |
| Warranty | 2 years |
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