Self luminous tritium exit signs3/7/2024 ![]() How do I know if I have tritium exit signs in my facility? A typical tritium exit sign is pictured to the left. ![]() A Tritium self-luminous exit sign is a generally licensed (GL) device because it contains radioactive material initially amounting to approximately 25 curies of tritium per sign. These electrons excite or “charge” the phosphor, causing the glass tubes to continuously emit visible light. Tritium (H-3) is an isotope of hydrogen that emits low-energy beta radiation in the form of electrons. ![]() Specifically, the signs contain light sources that consist of glass tubes, internally coated with phosphor, and filled with tritium gas. TRITIUM EXIT SIGN REMOVE AND REPLACE PROGRAMS MADE EASY Tritium exit signs passed their expiration datesĪ self-luminous Tritium exit sign is a non-electrical product that uses radioactive tritium gas to produce light.
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