What are Tritium Exit Signs
A Tritium exit sign is a type of emergency exit sign that uses tritium, a radioactive isotope of hydrogen, to produce a continuous source of light without the need for external power sources like electricity or batteries. These signs are commonly used in buildings, especially in areas where a reliable source of illumination is crucial during power outages or emergencies.
Tritium exit signs typically consist of a sealed glass tube filled with a small amount of tritium gas. The tritium gas undergoes radioactive decay, emitting beta particles that strike a phosphorescent material coated on the inside of the glass tube. This interaction causes the phosphorescent material to glow, providing a steady and visible source of light. Tritium exit signs are easy to install and require minimal maintenance since they don't rely on electrical components or batteries.
The use of tritium in exit signs is generally considered safe for humans because the radioactive emissions are very weak and are contained within the sealed glass tubes. However, regulatory authorities and environmental agencies monitor and regulate the use of tritium exit signs to ensure they are safely manufactured, installed, and disposed of when they reach the end of their operational life. Additionally, as of my last knowledge update in January 2022, there might be evolving regulations and alternatives for emergency exit signs, so it's important to stay informed about the most current standards and options in your region.