Tritium Exit Signs are the most reliable exit signs
produced today. Tritium Exit Signs require no external
power source, no electrical wiring or batteries to replace and are
always ready to provide an effective, maintenance-free exit system. Tritium Exit Signs will provide a luminescent sign under
any condition, even during an extended period of power outage.BulbTown is proud to offer the finest Self Powered Tritium Exit
Signs available. Tritium Exit signs come with a ten or twenty year life-span and come in either white or black frames and Red or Green stencils.
What is Tritium?
Tritium, also known as 3H or H-3, is a radioactive
isotope of hydrogen. In EXIT signs the gas is contained in sealed glass
tubes lined with a light-emitting compound. The tritium gives off
low-energy beta radiation that causes the lining to glow. This type of
radiation cannot penetrate a sheet of paper or clothing. If inhaled, it
leaves the body relatively quickly. Tritium gas is odorless, colorless
and tasteless, and is lighter than air.
There are a couple ways to know whether an EXIT sign
contains tritium. When the lights are off, tritium will make the word
EXIT glow green or red. The sign should also have a permanent warning
label that mentions tritium, 3H or H-3; displays the three-bladed
radiation warning symbol; and states "Caution-Radioactive Materials." If
all four letters in EXIT are fully lit, the sign is working properly.
If not, the sign may be damaged or have reached the end of its working
Many kinds of facilities across the United States use
tritium EXIT signs, including public and private office buildings,
theaters, stores, schools and churches. The NRC estimates there are more
than two million tritium EXIT signs in use in the United States.