Garrett GT-110 Metal Detector Owner's Manual

Model: GT-110

Introduction

This manual provides information on the Garrett GT-110 pinpointer metal detector, covering its features, operation, specifications, and maintenance.

Product Image: The Garrett GT-110 is an orange, handheld metal detector. It features a ruler molded into its exterior for measuring target depth in centimeters or inches.

Key Features

The GT-110 is equipped with the following features:

(1) ON/OFF, Retune, Adjust Button: Primary control for power and settings.
(2) Pinpointing Tip: Designed for precise target location.
(3) 360° Side-Scan Area: Allows detection from all sides of the pinpointer.
(4) Exclusive Scraping Blade: A rugged edge useful for sifting through dirt to uncover targets.
(5) LED Flashlight: Integrated light for visibility in low light conditions.
(6) Waterproof Speaker: Emits audio alerts for detected targets.
(7) Lanyard Attachment Loop: For securing the device with a lanyard.
(8) Sealed Battery Cover: Provides access to the battery compartment and ensures water resistance.
(9) Ruler: A molded ruler on the device body, marked in inches and centimeters.

Illustration Description: An illustration displays the GT-110 pinpointer with numbered callouts corresponding to the features listed above. A separate detail shows the ruler markings in both inches (IN) and centimeters (CM).

Operation

Powering On

To power on the GT-110, press and release the button (①) while holding the detector away from any metallic objects. You will hear two beeps, and the LED (⑤) will remain illuminated.

Powering Off

To power off, press and hold the button (①) for approximately half a second until a single beep (or a single vibration in Silent Mode) is heard.

Changing Settings

The GT-110 offers two detection modes: Audio-plus-Vibrate or Vibrate-only (Silent Mode). To enter the adjustment mode, press and hold the button (①) for 2 seconds. This is indicated by a single beep followed by a dual-tone beep and a flashing LED (or vibration pulses in Silent Mode). The first button press after entering adjustment mode shows the current setting. Repeatedly pressing the button cycles through the two settings:

1 beep: Maximum Sensitivity with Audio and Vibration (Default setting).
2 vibrations: Maximum Sensitivity with Vibrate-only (Silent Mode).

To exit adjustment mode, press and hold the button for 2 seconds (indicated by a dual-tone beep or dual vibration in Silent Mode), or wait 5 seconds for automatic exit.

Note: Settings are remembered when the unit is switched off and back on.

Advanced Operation and Tips

Fast Retune for Mineralized Ground

To tune out false signals from challenging environments such as saltwater, wet sand, or highly mineralized ground, hold the tip of the GT-110 to the ground and quickly press the button (①) for an instant retune. Repeat this process if necessary to further eliminate environmental responses.

The Fast Retune feature is designed to quickly tune out mineralized ground, saltwater, wet sand, and other difficult environmental conditions.

Precisely Pinpointing Large Targets

When a target is detected, slowly scan towards the object until the response increases to a full, constant alarm. Then, quickly press the button (①) to instantly retune and narrow the detection field. Continue scanning towards the object to find its precise location. Repeat the Fast Retune process as needed to further narrow the detection field.

Lost Pinpointer Alarm

If the GT-110 is left ON without any button presses for 5 minutes, it will begin emitting progressively faster warning chirps for 60 minutes. Pressing the power button will reset this alarm.

Auto-Off Feature

After one hour of warning chirps from the Lost Pinpointer Alarm, the GT-110 will automatically power off.

Scraping Blade

The rugged edge of the scraping blade is ideal for sifting through dirt while searching for a target. The GT-110's 360° side-scan detection capability means it will alarm when the blade is passed in close proximity to a metallic target.

Lanyard Attachment Clip

Use the lanyard attachment clip to secure the GT-110 to your belt, digging pouch, or your primary metal detector.

Holster

The included holster can be secured to any standard-size belt. It features a metal snap that will cause the pinpointer to alarm if it is put away while still powered on.

Maintenance and Usage

Ruler

The GT-110 has a ruler molded into its exterior to measure a target's depth in either centimeters or inches.

Low Battery Alarm

When the battery becomes low, the detector will sound an alternating dual-tone alarm. Replace the 9V battery as soon as possible.

Battery Replacement

To replace the battery, simply rotate the battery cover counterclockwise to remove it and clockwise to tighten it by hand. To properly install the 9V battery, match the larger battery terminal to the larger opening in the compartment. Remove the battery when the unit is to be stored for more than 30 days.

Operational Information

Operation is completely automatic. All metals will be detected, including ferrous and non-ferrous.
When a target is detected, the GT-110 will produce an audio and/or vibration alert. The rate of the pulsing audio and vibrations increases proportionately as the pinpointer is moved closer to a metallic target.
To avoid cancelling out a target, do not turn on the GT-110 while it is adjacent to the target.
Because the GT-110 is a static, non-motion detector, optimum operation is achieved when the unit is switched off between uses.
Avoid using the GT-110 as a digging or prying tool. It is designed for flat side-scanning and precise pinpointing with its tip. It is not intended to be used with excessive force.

Water Use and Cleaning

For water use, do not exceed 10 feet (3 meters) depth. Make sure the battery cap threads are free of sand, sediment, etc., and that the O-ring is periodically lubricated with silicone grease to maintain a tight seal.
To remove dried dirt, mud, or other debris from the unit, simply hand wash it with soap, water, and a soft cloth. Do not use any type of abrasive or chemical cleaners which could scratch or erode its surface.

Specifications

Specification	Details
Model Name	GT-110
Model Number	180503111
Operating Temperatures	-35°F (-37°C) to 158°F (70°C)
Operating Frequency	11.9 kHz
Waterproof Rating	10 foot (3 meter) maximum depth; IP 68
Tuning	Automatic or manual retune
Indicators	Proportional audio/vibration pulse rate
Controls	Power, Retune, Adjust switch
Dimensions	Length: 9" (23cm) Thickness: 1.6" (4.1 cm)
Weight	5.6 oz. (0.16 kg.)
Battery	Single 9V (6f22)
Battery Life	Carbon: 16 hours Alkaline: 30 hours

Manufacturer Information

The GT-110 is manufactured in the United States of America and in accordance with Garrett's ISO 9001 internationally certified Quality Management System and meets the following international standards.

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