$3 Shipping on all Domestic Orders * Free International Shipping on Orders Over $150
Skip to content

Isotope Photon Tritium Cell

$17.95 Regular price
Unit price

$3 Shipping on all Domestic orders

FREE International Shipping on Orders Over $150

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

This borosilicate glass tritium cell module is an exact replacement for the module included in the TEC Isotope Photon tritium fob. If you were to ever damage or lose the original module, this is an easy do-it-yourself replacement to get you up and glowing again!

The Isotope Photon was designed around the concept of using a replaceable tritium module. This is not necessarily due to the need for a such a feature, but it allow us to use this standard design element to integrate this module into other future product designs. In addition, it also provides a component that others can use in their own designs for integrating tritium into their products. 

What you get:

  • (1) Replacement Borosilicate Glass Tritium Cell Module which includes:

    • (1) Borosilicate glass window
    • (2) Aluminum end caps
    • (2) End cap O-rings
    • (2) Tritium O-rings

Borosilicate Glass:
Although we have integrated this glass window into the TEC Photon fob and is therefore susceptible to breakage, we use a very high quality borosilicate glass. This is similar to the more familiar brand name Pyrex, and is extremely durable against thermal stress and shock. We have performed 5' high drop tests of the Photon assembly onto a hard concrete surface without glass breakage. However please bear in mind that this does not guarantee it will always survive such a fall, or that the installed tritium vials will survive such shock so please consider this in your application.

This tritium cell module features end cap supports for holding the tritium vial and a borosilicate glass window. This scratch resistant, crystal clear glass window will provide optimum visibility of the installed tritium vials.


  • Assembled dimensions: 0.315" [8.0 mm] diameter x 1.30" [33.0 mm] long
  • Outside diameter tolerance: 0.315" +/-0.012" [8.0 +/-0.30 mm]
  • Weight: approximately 2.2 grams [0.077 oz] without tritium

If you plan to integrate this tritium cell into your own product design, please be advised of the following:


  • The assembly is held together using the pressure of the O-rings, therefore the entire cell must be contained on both sides to prevent the cell components from separating
  • Similar to our design, we suggest spring loading one end of the module to reduce shock and to minimize potential breakage of the tritium vial
  • If you install this module into a bore, be advised of the dimensional tolerance:
  • Outside diameter tolerance: 0.315" +/-0.012" [8.0 +/-0.30 mm]
  • This module accepts a standard 3mm x 23mm tritium vial
  • Please be aware of the legal issues regarding the sale of tritium products in your country. Check out our tritium primer for further information.

TEC Accessories offers a 30 day no-questions-asked return policy on all of our products. If you are not satisfied with your purchase, for any reason, contact us to arrange a return/refund. In addition, all products carry a 90 day warranty against defects in materials or workmanship. Please contact us if you have any problem with your purchase that requires attention, and we will promptly make any necessary corrections.

Shipping Times

PLEASE NOTE: Due to the current logistics delays, shipping times may take longer than expected. This is especially true for International shipments, where delivery times can take weeks longer than usual. This is beyond our control, and we ask that you please be patient with expected deliveries until shipping companies get back to a more "normal" schedule.

We make every effort to process orders within one working day, however there may be slight delays depending upon the number of orders we receive, holiday periods and available staffing resources. Typically we will process all orders within no more than 2 working days.

Shipping times (from the time the package is dropped off at the carrier) will vary depending upon the carrier, method of shipment and destination. For example USPS Domestic First Class Mail should take between 2-3 days, but we have seen instances of 5-7 days. Domestic Priority Mail should take 1-2 days, but can take anywhere from 1-4 days. Domestic Express Mail should take one day, but that is only if your processed order is delivered to the post office before the cutoff time (typically 12:00 noon). Also keep in mind that weather and travel distance can have an effect on delivery times.

International shipments have even more variables that must be considered. A package sent by USPS First Class International can take anywhere from 1-3 weeks, sometimes longer depending upon the country. International shipments have the potential of being delayed by Customs, as well as having additional taxes or fees levied on a package. These are out of our control, and we advise that you become familiar with your specific country's shipping regulations to understand the impact to your shipment.

Newsletter Sign Up

Sign up for our newsletter and we promise to offer you interesting content, exceptional discounts, and sent to your inbox only once every 3-4 weeks. And we will NEVER give your email address to anyone. Give us a chance!

Newsletter Sign Up