NOTE: This product is expected to be released the first week of September

IMPORTANT NOTE: This product DOES NOT include tritium vials. Please refer to our Tritium Primer to learn more about tritium and where to purchase it.

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

The TEC Isotope Core Fob is a titanium housing with a translucent resin insert suitable for mounting three glass tritium vials.

• Housing Material: Ti-6Al-4V Titanium
• Finish: Bead Blasted
• Outside Diameter: 13.5 mm [0.53"]
• Overall Length: 42.5 mm [1.67"]
• Split Ring Hole Size: 3.0mm [0.118"]
• Total Assembled Weight (with snap clip and split ring): 13.4 grams [0.47 oz]
• Total Weight (fob only): 10.4 grams [0.37 oz.] 
• Does not contain tritium vials

The TEC Isotope Fob Series are keychain fobs specifically designed to mount standard 3mm x 23mm and/or 3mm x 11mm self-luminous tritium vials. They do not include tritium vials, you must purchase them from another source typically outside the United States.

Learn more about what tritium is and where to buy it by clicking here.

Install tritium vials and assemble as shown:

Installation Instructions:

1. Remove the Isotope Core items from the foam packaging.
2. Install the customer-supplied tritium vials into the tritium cell.
3. Insert the rubber plugs into the tritium vial holes to secure the tritium vials. NOTE: DO NOT USE HIGH FORCE TO INSTALL THE RUBBER PLUG INTO THE HOLEs, AS YOU MAY DAMAGE THE GLASS TRITIUM VIALS.
4. Insert the neoprene washer into the bottom of the housing bore.
5. Insert the tritium cell into the housing bore as shown in the diagram. Make sure to align the tritium vials with the windows in the housing.
6. Insert the o-ring into the housing bore, pushing it into the groove inside the bore. This will secure the tritium cell into position.

NOTE: If you wish to change the tritium vials at some point in the future, you can simply remove the rubber plugs using an X-acto knife or safety pin.