Fisher Research Labs F22 Weatherproof All-Purpose Metal Detector with 9" Concentric Elliptical Waterproof Searchcoil, 7.69 kHz. Operating Frequency

The F22 is a fully weatherproof, easy to use turn-on-and-go metal detector. It has superfast retune speed with excellent target separation and easy to use Discrimination, Sensitivity, Notch and Pinpoint features. Fe-Tone adjustable iron audio allows you to set the volume of ferrous targets lower than the volume of non-ferrous targets for increased clarity on desirable targets. Easily identify buried targets with the 9-Segment Target Categories and a 0-99 numeric Target-ID enhanced with 4-Tone Audio-ID System. Custom made to allow users to set their own tones. Go ahead, get it wet! The F22 can handle almost any environment!

This detector comes with a waterproof searchcoil. The searchcoil can be completely submerged into water. The control housing is weatherproof but cannot be submerged in water.

Buried Utility Lines
This hobby metal detector is not designed to locate buried pipes or cables. First Texas Products manufactures a complete line of pipe and cable locators for this application. These are sophisticated instruments with functionality different from your hobby metal detector.

Severe Soil Conditions
While this detector has proprietary circuitry to cancel out minerals naturally occurring in most soil types, it cannot penetrate the most severe soils and it is not intended for use on wet sand saltwater beaches. However, it is well-suited for detecting on dry sand. Saltwater is highly conductive and requires a more sophisticated type of detector. First Texas Products offers such types of detectors. Other highly mineralized soils, such as those found in some gold prospecting sites, may also limit this detector's capability. If the detector tends to overload it could indicate you are in an area containing such severe soils.

Target-ID
The detector's Target-ID system calculates and displays the most probably identification. Target-ID is affected by soil conditions, the searchcoil's distance from the target, the length of time the target has been buried and the target's proximity to other dissimilar targets. Very large metal objects can overload the detector and may be classified inaccurately.

Reduce Sensitivity
The primary purpose of the Sensitivity control is to allow the operator to reduce the sensitivity of the detector. All detectorists desire to find objects at maximum depth. However, in today's environment there is a never-ending variety of devices emitting EMI (Electromagnetic Interference) that can interfere with this detector. There will be environments where the detector cannot operate at maximum sensitivity.

This is not a defect. If you find yourself in such an environment, reduce the sensitivity of the detector. Some environments may have so much EMI it is impossible to detect there. Both overhead power lines and buried power lines can interfere with this detector. Power line capacity may be quite different during certain times of the day. For instance, peak hours of electrical use that can occur around 6 p.m. can lead to a lot of EMI. If you experience power line interference, try returning to a given area at a different time of day.