Teknetics Omega 8500 Metal Detector with 10" Waterproof Concentric Search Coil

The Teknetics Omega 8500 Metal Detector is a versatile VLF detector designed for coin hunting, relic hunting, jewelry hunting, and general-purpose treasure detecting.

Operating at 7.69 kHz, the Omega 8500 combines detailed digital Target ID with advanced ground information, Ground Grab® computerized ground balancing, manual ground balance, adjustable discrimination, notch control, customizable audio, and dedicated static pinpointing.

This configuration includes a 10" waterproof concentric search coil, giving detectorists a useful balance of ground coverage, precise target response, and maneuverability for parks, yards, fields, old home sites, and other everyday detecting locations.

The Omega 8500 also provides unusually detailed control over gain, threshold, audio, ground conditions, and filtering, making it a strong choice for users who want more adjustability than a basic detector without moving into an overly complicated platform.

Key Features

• 7.69 kHz VLF Operating Frequency – Provides versatile performance for coins, jewelry, relics, and general treasure hunting.

• 10" Waterproof Concentric Search Coil – Offers a balanced combination of ground coverage, target response, and maneuverability.

• Discrimination and All Metal Modes – Choose between selective target rejection and a more responsive All Metal search.

• Ground Grab® Computerized Ground Balance – Quickly matches the detector to current soil conditions.

• Manual Ground Balance – Allows experienced users to fine-tune ground settings when needed.

• Ground Grab Offset – Lets you intentionally bias automatic ground balance above or below the measured ground phase.

• Digital Target Identification – Provides detailed numerical target information to help evaluate objects before digging.

• Multiple Target Category System – Displays a primary Target ID along with additional target-category information in Discrimination mode.

• Adjustable Discrimination – Set discrimination from 0–80 to reduce responses from unwanted targets.

• Selectable Notch Control – Accept or reject individual target categories without relying only on linear discrimination.

• Five Discrimination Tone Configurations – Customize the detector's audio response around your hunting preferences.

• Adjustable Category Volume – Reduce the volume of individual target categories while keeping other target responses strong.

• Independent Gain and Threshold Controls – Fine-tune signal amplification and response threshold separately.

• Four Deep Settings – Choose different filtering characteristics for trashy ground, general hunting, deeper targets, or electrical interference.

• Frequency Shift – Helps reduce electromagnetic interference from nearby detectors and electronic sources.

• Static Pinpoint Mode – Accurately locate a target without requiring continuous coil motion.

• Depth Readout in Pinpoint – Displays approximate target depth in inches for coin-sized objects.

• Fe3O4 Ground Mineralization Meter – Shows the amount of magnetic mineralization in the soil.

• Ground Phase Display – Provides numerical information about the type of ground mineralization.

• Ground Error Indicator – Shows whether the current ground balance setting is above or below the actual ground conditions.

• Adjustable Backlight – Five brightness levels plus off for low-light detecting.

• Nonvolatile Memory – Stores most user settings after the detector is switched off.

• 20–25 Hour Battery Life – Runs on one standard 9V alkaline battery.

Who Is the Teknetics Omega 8500 Best For?

The Omega 8500 is an excellent choice for detectorists who want advanced ground and target information while keeping operation relatively straightforward.

It is particularly well suited for:

• Coin shooting

• Jewelry hunting

• Relic hunting

• Parks and public areas

• Residential yards

• Old home sites

• Fields and open ground

• Mineralized soil

• Trashy detecting locations

• Experienced hobbyists who want more control over audio and ground settings

• Beginners ready to move beyond entry-level detector controls

Its combination of automatic and manual ground balancing, advanced target information, flexible discrimination, and adjustable audio makes it adaptable to a wide range of hunting conditions.

7.69 kHz VLF Performance

The Omega 8500 operates at 7.69 kHz, a versatile single-frequency VLF platform well suited to general treasure hunting.

This frequency provides balanced performance across many common targets, including:

• Coins

• Rings

• Jewelry

• Relics

• Tokens

• Brass objects

• Copper targets

• General metallic artifacts

This makes the Omega 8500 a practical detector for users who regularly search several different types of locations instead of specializing in one target category.

10" Waterproof Concentric Search Coil

This package includes the 10-inch concentric search coil.

A concentric coil provides a symmetrical detection field and predictable target response, making it useful for general detecting and accurate target location.

The 10-inch size provides a good balance between:

• Ground coverage

• Target separation

• Maneuverability

• Depth potential

• Pinpointing precision

The search coil is waterproof, allowing it to be used in wet grass and shallow water.

Keep the detector's control housing dry when hunting around water.

Discrimination and All Metal Modes

The Omega 8500 provides two primary search modes.

Discrimination Mode

Discrimination Mode allows the detector to classify targets visually and audibly while rejecting selected unwanted metals.

This mode requires coil motion and provides detailed target information for coin, jewelry, and relic hunting.

All Metal Mode

All Metal Mode provides a VCO-style audio response and lets the detector report all detected metals without conventional discrimination.

Gain and threshold can be adjusted independently, giving experienced users considerable control over weak target responses.

Ground Grab® Computerized Ground Balance

Naturally occurring minerals in the soil can interfere with a detector and reduce target accuracy.

The Omega 8500 includes Ground Grab® computerized ground balancing.

By pumping the search coil over a clean patch of soil while holding the Ground Grab control, the detector measures the ground phase and automatically adjusts its internal ground setting.

This helps reduce false responses and improve detector stability.

Manual Ground Balance

The Omega 8500 also allows the ground balance setting to be adjusted manually.

This is useful when:

• Soil mineralization changes rapidly

• Automatic Ground Grab needs fine-tuning

• Searching heavily mineralized ground

• An experienced detectorist wants more precise control over ground response

The detector also provides a Ground Error display, showing whether the current setting is above or below the measured ground phase.

Ground Mineralization Information

One of the Omega 8500's more advanced features is the amount of ground information available on the display.

Fe3O4 Meter

A four-segment Fe3O4 bar graph indicates the amount of magnetic mineralization in the ground.

Ground Phase

The Ground Phase value gives additional information about the type of mineralization beneath the search coil.

Ground Error

The Ground Error display compares the detector's internal ground balance setting against the actual ground phase.

Together, these tools help experienced detectorists better understand difficult soil conditions.

Digital Target Identification

The Omega 8500 provides detailed numerical Target ID information to help determine what may be beneath the search coil.

Typical values documented by Teknetics include:

• 10–39: Iron

• 56–57: Nickel

• 60–62: Older pull tab

• 62–65: Newer pull tab

• 66–72: Screw cap

• 76–78: Zinc penny

• 82–83: Dime or copper cent

• 86–87: Quarter

• 90–91: Half dollar

• 94–95: Silver dollar

Target ID should always be considered an estimate because depth, target orientation, soil conditions, corrosion, and nearby objects can change the displayed value.

Multiple Target Category System

In Discrimination Mode, the Omega 8500 can calculate several pieces of target information during a single coil pass.

The detector identifies a primary target response while also presenting additional category information.

This can be useful when:

• Multiple targets are close together

• A target has an irregular shape

• A signal is weak or deep

• Trash is located near a desirable target

Adjustable Discrimination

The Omega 8500 provides a 0–80 discrimination range.

Increasing discrimination eliminates progressively higher target categories from detection.

This gives users flexibility to configure the detector differently depending on the site.

For example, a park coin hunter may use more discrimination than a relic hunter searching an old property.

Selectable Notch Discrimination

Notch allows specific target categories to be independently accepted or rejected.

Available notch categories include:

• Foil

• Nickel

• Pull Tab

• Screw Cap

• Zinc

• Dime

• Quarter

This provides more precise control than linear discrimination alone.

Advanced Audio Control

The Omega 8500 provides several ways to customize target audio.

Discrimination Tone Options

Five preset tone configurations are available in Discrimination Mode.

These allow you to alter the way different target categories sound.

All Metal VCO Audio

In All Metal Mode, four pitch selections are available for the VCO response.

Target Category Volume

Individual target categories can also have their volume reduced independently.

The category volume offset ranges from 0 to -9, allowing unwanted targets such as iron to remain audible without dominating the hunt.

Independent Gain and Threshold

Unlike detectors that combine sensitivity into a single setting, the Omega 8500 provides independent Gain and Threshold controls.

Gain controls signal amplification.

Threshold determines the minimum signal level required to produce a response.

Adjusting the two separately provides experienced users with greater control over weak and deep target signals.

Four Deep Settings

The Omega 8500 includes four selectable filtering configurations:

• D0: Fast filtering for improved separation in heavy trash

• D1: General-purpose filtering

• D2: Deep filtering with 60 Hz notch

• D3: Deep filtering with 50 Hz notch

These settings allow the detector to be adjusted around site conditions rather than forcing the same processing behavior everywhere.

Frequency Shift for EMI

Electrical interference can cause chatter and unstable signals.

The Omega 8500 includes frequency shifting, allowing the detector's operating frequency to be slightly offset to reduce interference from nearby electronics or other metal detectors.

Ground balance should be checked again after changing the frequency setting.

Static Pinpoint Mode

After locating a target, press and hold PIN POINT.

Pinpoint Mode is static, meaning coil motion is not required to maintain a target response.

Slowly move the coil over the target and listen for the strongest response to determine its center.

The display also changes to show the target's approximate depth in inches, calibrated for coin-sized objects.

Adjustable Backlight

The LCD backlight provides five brightness levels plus off.

This makes the display easier to read during:

• Early morning hunts

• Evening detecting

• Shaded locations

• Low-light conditions

Higher backlight levels consume more battery power.

Nonvolatile Memory

The Omega 8500 stores most detector settings when powered off.

This allows you to return to your preferred setup without rebuilding every adjustment before each hunt.

The backlight and ground balance settings are exceptions and return to their default behavior when restarted.

Technical Specifications

Specification	Details
Brand	Teknetics
Model	Omega 8500
Technology	VLF
Operating Frequency	7.69 kHz
Search Coil	10" Concentric
Search Coil Waterproof	Yes
Search Modes	Discrimination, All Metal
Ground Balance	Ground Grab® Automatic + Manual
Ground Grab Offset	Yes
Ground Phase Display	Yes
Fe3O4 Mineralization Meter	Yes
Ground Error Indicator	Yes
Digital Target ID	Yes
Typical Iron Target ID	10–39
Discrimination	Adjustable 0–80
Notch	Selectable Target Categories
Discrimination Audio	5 Preset Tone Configurations
All Metal Audio	VCO, 4 Pitch Options
Master Volume	0–10
Category Volume Offset	0 to -9
Gain Control	Adjustable
Threshold Control	Adjustable
Deep Filters	D0, D1, D2, D3
Frequency Shift	Yes
Pinpoint	Static / No-Motion
Pinpoint Depth	Approximate Depth in Inches
Backlight	0–5
Settings Memory	Yes
Headphone Jack	1/4"
Battery	1 × 9V Alkaline
Battery Included	No
Approximate Battery Life	20–25 Hours

What's Included

• Teknetics Omega 8500 Metal Detector

• 10" Waterproof Concentric Search Coil

• Shaft and stem assembly

• Armrest assembly

• Search coil mounting hardware

• User documentation

Battery: Requires one 9V alkaline battery. Battery is not included.

Compatible Search Coil Options

Teknetics documentation identifies several coils for the Omega platform:

• 5" Bi-Axial DD Search Coil

• 10" Concentric Search Coil

• 10" Bi-Axial DD Search Coil

• 11" Bi-Axial DD Search Coil

The 10" concentric coil is included with this specific ASIN package. Other compatible coils are sold separately.

Why Choose the Teknetics Omega 8500?

The Omega 8500 stands out because it provides considerably more detector control than a basic general-purpose VLF machine while remaining approachable for everyday treasure hunting.

You get Ground Grab automatic and manual ground balancing, detailed mineralization information, advanced Target ID, adjustable discrimination, selectable notch, multiple audio configurations, independent gain and threshold controls, frequency shifting, four Deep settings, and static pinpointing.

The included 10" waterproof concentric search coil provides a versatile balance of coverage and precision for parks, yards, fields, relic sites, and other general hunting locations.

For detectorists who want a lightweight, highly adjustable machine for coins, jewelry, relics, and general treasure hunting, the Teknetics Omega 8500 offers an excellent combination of control, target information, and everyday usability.

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