TEC-T9-323-3X Isotope Core Fob

IMPORTANT NOTE: This product DOES NOT include tritium vials. 

Three Vials. Continuous Illumination. No Charging Required.

The TEC Isotope Core is a tritium lantern based on our T9 Embrite™ Glow Fob, redesigned to accept three 3mm × 23mm self-luminous tritium vials instead of an Embrite™ glow core.

Unlike phosphorescent materials that must be charged with light, tritium vials provide continuous illumination without sunlight, UV light, or external charging. Once installed, the vials glow continuously for many years, making the Isotope Core a distinctive and virtually maintenance-free source of light for everyday carry.

Designed to Showcase Tritium

The precision-machined Grade 5 titanium housing features six equally spaced viewing windows, alternating between slots and perforated patterns. This unique arrangement allows light from the three tritium vials to be visible through multiple windows, creating a distinctive 360° visual effect.

Choose three different vial colors for a vibrant combination of colors, or use three vials of the same color to create a concentrated burst of your favorite color. The translucent resin insert securely positions the vials within the titanium housing while allowing their illumination to shine through.

The tritium vials are simple to install and can be removed and replaced whenever you want to change colors or refresh the look of your Isotope Core. Please refer to the Installation tab for detailed instructions.

Built for Everyday Carry

The Isotope Core combines the distinctive appearance of tritium illumination with the strength, lightweight performance, and corrosion resistance of Grade 5 titanium.

Attach it to your keys, zipper, backpack, gear bag, or anywhere you want a distinctive source of light that's easy to find when the lights go out.

No charging. No switches. Just continuous illumination.

TEC Isotope Core Features

Precision-machined Grade 5 titanium construction

Durable bead-blasted finish

Accepts three 3mm × 23mm self-luminous tritium vials

Compatible with commonly specified 3mm × 22.5mm tritium vials

Six precision-designed viewing windows showcase the tritium illumination

Combine different vial colors or use three matching colors

Continuous illumination without charging

No sunlight, UV light, or external power required

Tritium vials provide illumination for many years

Lightweight, corrosion-resistant titanium construction

Designed for indoor and outdoor everyday carry

Ideal for keys, zippers, backpacks, gear bags, and EDC equipment

Tritium vials are not included

What you get:

(1) TEC Isotope Core Fob with resin insert for tritium mounting

Packaged with (4) rubber plugs for tritium vial containment (3 required plus 1 spare)

(1) 11.1 mm [7/16"] diameter split ring

(1) Snap clip for attachment to other items

Packaged in a foam-lined case

Important Note: Product DOES NOT include tritium vials