Teknetics Omega 8500

The Omega 8500 is a single-frequency Teknetics detector at 7.69 kHz, weighing 2.5 lb. Target identification comes as numeric target ID, Fe readout, 3-tone audio and VCO.

Specs read Oct. 16, 2026 on firsttexasproducts.comListed on Amazon as the detector alone

7.69 kHzOne frequency

CoilWaterproof part

2.5 lbWeight, 1.1 kg

Omega 8500 tech specsFacts from First Texas Products' product page, rewritten. A value First Texas Products does not publish is marked.
Technology	Single frequency
Frequencies	7.69 kHz
Waterproofing	Coil only (depth not published)Control box not weatherproof
Weight	2.5 lb (1.1 kg)
Coils	10-inch round open concentric (spec sheet)Elliptical (product page)Teknetics publishes both.
Battery	1 x 9 V (not included)
Battery life	Up to 25 h20-25 h
Search modes	All Metal, Discrimination
Sensitivity	99 levels
Target ID	Numeric target ID, Fe readout, 3-tone audio and VCO
Display	Backlit LCD
Warranty	2-year limited
Status	In the current range

Source: First Texas Products, Teknetics Omega 8500 product page (opens in a new tab), read Oct. 16, 2026.

Source: First Texas Products, Teknetics Omega 8500 spec sheet (PDF) (opens in a new tab), read Oct. 16, 2026.

How it differs from its neighbors

The coil is a 10-inch concentric, but its shape is published two ways: round and open on the spec sheet, elliptical on the product page. Only the coil is waterproof. The spec sheet notes that the control box is not weatherproof.

The Delta 4000 runs at 7.8 kHz and weighs 2.6 lb, on an 8-inch concentric coil. Its target ID is listed as numeric target ID, 3-tone audio, no Fe readout, and sensitivity has 12 levels.

The T2 moves up to 13 kHz with a 1 to 99 ID on a Large LCD. Fisher's F44 uses the same 7.69 kHz, weighs 2.3 lb and runs on 2 x AA.

Omega 8500 and Delta 4000 compared
Spec	DetectorOmega 8500	DetectorDelta 4000
Frequencies	7.69 kHz	7.8 kHz
Waterproofing	CoilWaterproof part	CoilWaterproof part
Weight	2.5 lb1.1 kg	2.6 lb1.17 kg
Battery	1 x 9 V (not included)	1 x 9 V (not included)
Target ID	Numeric target ID, Fe readout, 3-tone audio and VCO	Numeric target ID, 3-tone audio, no Fe readout
Display	Backlit LCD	LCD
	View on Amazon Omega 8500 (opens in a new tab)Affiliate link	View on Amazon Delta 4000 (opens in a new tab)Affiliate link