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TEC Accessories Knowledgebase

TEC-S3 Glow Fob

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The TEC-S3 Glow Fob is a unique glow-in-the-dark (GITD) keychain fob unlike any you have ever seen. The internal glow pellet consists of a clear acrylic tube filled with a special glow powder and resin mixture. The pellet is mounted inside a protective stainless steel housing with a uniform bead blasted matte finish.

When exposed to light, it will glow for hours...the longer the exposure time and the higher the light intensity, the longer and brighter it will glow. Glow times can last as long as 12 hours! Refer to the "Properties" tab above for details on glow intensity.

Attach the TEC-S3 to your car keys or even a flashlight, so you can always find them when the lights go out. Attach it to your jacket as a zipper pull so your friends can locate you inside a movie theater or outside at night! You can clip it to a backpack, camping gear, or even to the pull chain on a ceiling fan...the uses are endless!

And check out our Glow Fob Pellet Kit for DIY pellet replacement projects!

The TEC-S3 Glow Fob consists of a custom hand-made glow pellet inserted into an outer metal housing for protection and durability.


  • Material: Stainless Steel
  • Finish: Bead Blasted
  • Outside Diameter: 9.0 mm [0.35"]
  • Overall Length: 40.0 mm [1.58"]
  • Total Assembled Weight: 6.7 grams [.24 oz]

Internal Glow Pellet:

  • Tubing: Clear acrylic
  • Glow powder: strontium aluminate (mixed with resin)
  • Outside Diameter: 6.35 mm [1/4"]
  • Overall Length: 28.6 mm [1-1/8"]
  • Glow Color: Green

The TEC-S3 Glow Fob comes packaged in a foam-lined case with an 11.1 mm [7/16"] diameter split ring and snap clip for attachment to other items.

The process used to provide the desired glow feature is based on a charge/discharge cycle. You must first charge the pellet with light, which is then stored and slowly discharged. In order to achieve the best possible results from your unit, please review the following tips regarding light exposure and charging times.

The glow mixture within the pellet contains a precise ratio of glow powder and resin to achieve the best glow results. The glow powder itself reacts best when exposed to the UV portion of the light spectrum (i.e. sunlight), so daytime indoor room light or outdoor exposure will provide the best charge. In general, a short intense exposure will result in a very bright initial glow, but will rapidly fade since the pellet has not had a lot of time to charge. Exposure to light for an extended period of time will result in a slightly less intense glow, but it will last for a much longer period of time.

A pellet that is charged in ordinary sunlight or room light for an extended period will have a noticeable glow when the lights are turned off, and will diminish gradually over the course of several hours. Although the glow intensity will fade considerably over a long duration of time, it is not uncommon to still see a recognizable glow after 8-12 hours, especially with dark-adapted vision. This charging and discharging cycle can be performed an infinite number of times.

The TEC Glow Fobs are designed to allow easy replacement or exchange of the glow pellet by simply removing the o-ring at the end of the housing. We offer an optional DIY kit for those of you who may want to try making your own pellet inserts. Possible projects include glow pellets of different colors, or making a self-luminous tritium insert.

Check our web site for pellet ideas and instructions, and also browse our product selection for other glow fob models and accessories.

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Don't take our word for it...See what others say:
"The TEC- S3 Glow Fob is very high quality with top notch machining and finishing. It is a lot smaller than it looks online (which is a good thing) and the GITD pellet lights up like a Christmas tree. Also, compared to some of the other tritrium or GITD fobs available, this one is a steal at 22. I purchased my TEC- S3 to put on my keyring, but it was just too nice to let it get scratched up, so I hung it from my rear view mirror on a small stainless chain and it looks awesome."
-Cheryl P.

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