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The Fisher Gemini-3 is unable to detect small objects as a coin, but is able to detect large metal masses.
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The detection depth that can reach the Fisher GEMINI-3 metal detector varies from multiple factors that can affect your search:
Mineralization of the soil
Dimension of the object
How long the object is under ground.
The Fisher GEMINI-3 is designed to detect the variations in the conductivity of the soil on which the search is conducted.
A positive response indicates the presence of a metallic or mineral object, then this is more conductive than the surrounding ground.
The Fisher GEMINI-3 metal detector consists of a transmitter and a receiver connected by an aluminum rod.
The transmitter function is to send a radio frequency (RF) signal to a conducting object and generate an electromagnetic field around this object.
The function of the receiver is to locate the object by detecting the electromagnetic field around and responding with audio and visual signals.
Operating frequency: 82 kHz
Search Methods: All Metal: Inductive or Conductive Trace
Transmitter: Power (Power On / Off), Battery Test (Battery Test).
Receiver: Power (Power On / Off), Battery Test, Sensitivity (Sensitivity Adjustment)
Meter: Provides a visual indication of the receiver's signal for balancing and amplification
VCO audio response
Connector for connecting the plate (not included) to the transmitter, for searching in Conductive Trace mode
Power supply: 16 x AA
Typical autonomy is about 50 hours
Speaker on the receiver
Low battery signal
Weight: 3 Kg approx
Compatible for transportation
User manual in Italian and English
Warranty 5 years