Perfect Add-Ons
Frequently Asked Questions
Can the Fisher F22 be submerged underwater?
No, the Fisher F22 is weatherproof with an IP54 rating but is not designed for full submersion underwater. Only the search coil is waterproof.
What is the iron discrimination capability of the Fisher F22?
The Fisher F22 can discriminate against iron using its iron identifier icon and Fe-Tone® audio adjustments, effectively ignoring unwanted iron targets while detecting other metals.
What is the target-ID range on the Fisher F22?
The Fisher F22 features a numeric target-ID range from 1 to 99, indicating the conductivity of detected objects, with higher numbers representing more conductive metals.
How many audio tones does the Fisher F22 produce for different targets?
The Fisher F22 produces four distinct audio tones (bass, low, medium, high) corresponding to the conductivity and type of detected metal.
Does the Fisher F22 have a depth indicator?
Yes, the Fisher F22 includes a 3-segment depth indicator for coin-sized objects, showing the approximate depth of detected targets.
Can the Fisher F22 detect gold?
Yes, the Fisher F22 can detect gold, particularly in the "Gold" target range on the display, although it is more sensitive to small gold items at shallow depths due to its 7.69 kHz frequency.
Replacement Parts
Depth Detection Factors
The detection depth of a metal detector is primarily influenced by the size of the search coil. Typically, a coil will detect coin-sized objects at a depth roughly equivalent to the coil's diameter. For example, a 4" coil is likely to detect coin-sized objects up to 4" deep, whereas an 8" coil may detect similar objects at a depth of up to 8". However, detection depth can be significantly affected by several variables, including electromagnetic interference (EMI), detector sensitivity settings, and soil mineralization.
Soil conditions play a crucial role in depth detection. Here are three common soil types that can impact performance:
Highly Mineralized Soil: Rich in iron and other conductive minerals, this type of soil can cause false signals and reduce the detector's depth capability. The detector may struggle to differentiate between the soil and metal objects, leading to decreased accuracy.
Wet or Saline Soil: Soils with high moisture content or salinity, such as those found near coastal areas, can enhance conductivity, causing the detector to register numerous false signals. This interference may mask deeper targets and limit the effective detection depth.
Compact Clay Soil: Dense and compacted clay can create a challenging environment for metal detection. Its dense nature can impede electromagnetic signals, reducing the detector's sensitivity to deeper targets. Additionally, the moisture-retaining properties of clay may cause additional signal distortion.
Understanding these factors and adjusting the detector's settings accordingly can help optimize detection depth and accuracy across various conditions.