Exit Sign - Self-luminous - Tritium - Black - 12-15 Week Lead Time
- Call for availability of RUSH orders
- OPERATING TEMPERATURE - 76°F TO +212°F
- Field selectable arrow configuration
- Explosion and weather-proof construction
- Easy installation, no wires
- Concealed mounting
- Suitable for floor proximity mounting
- NRC Regulated product, nonreturnable, non-refundable
- Single or double-sided option
The Exit Light Company has been a continuous provider of tritium exit signs since 2003 and is the go-to source of these units to the US Government.
An energy efficient exit sign that is explosion proof, weatherproof, wire- and maintenance-free. No batteries or electricity needed! Mounting bracket allows top or side installation.
Tritium Exit Signs are registered with the US Nuclear Regulatory Center as required by law. End User Information is required for all self-luminous tritium orders.
Made to order - non-returnable, non-refundable.
Frequently Asked Questions (FAQs):
How does it turn it on? Your sign is always on from the moment you receive it; just take it into a dark room and turn off the lights to view its illumination.
Why isn't it brighter? It doesn't need to be. The UL required contrast ratio of the face colors makes the exit sign very visible during the day. When the power has gone out, the sign becomes very visible. The brightness of this unit is more than twice the Underwriters Laboratories (UL) minimum requirement.
Is this sign approved? Yes! It meets the requirements of the National Fire Protection Association (NFPA) Life Safety Code 101 which is the main reference for most AHJ's. Other approvals/acceptance agencies include: Underwriters Laboratories, OSHA, NSI, BOCA, ICBO, SBCCI and the FAA (Commercial airliners have tritium exits to protect their passengers)
What is Tritium? Tritium gas is an isotope of the chemical element hydrogen that contains one proton, two neutrons and is naturally present in the atmosphere. Tritium is an unstable isotope, meaning that its molecular structure is subject to decay. Unstable isotopes are referred to as radioactive isotopes. In radioactive isotopes, the nucleus, or center, decays to form a different nucleus and a nuclear particle. The nucleus in tritium decays by emitting an electron called a beta particle. The rate at which a radioactive element loses its radioactivity (decays) determines its half-life, the time it takes the element to decay to half its original activity level. Tritium has a half life of approximately 12 1/2 years which is very short compared with many isotopes you may have read about in articles on current events or in high school or college science courses.
How does a tritium exit sign operate? Self-luminous signs use the electrons within tritium material to provide illumination without the need for a source of electrical power. The process is very similar to that in television sets where electrons are used to illuminate the front screen of the tube. The electron from tritium has a fraction of the energy of the electron in a color TV picture tube. That is why self-luminous signs are not visible in daylight while TV pictures are. The electrons from tritium have such low energy that they cannot even penetrate an ordinary sheet of paper. To produce the illumination, the tritium gas is contained within a hermetically sealed glass tube. The inside surfaces of the tube are coated with a phosphor. Electrons emitted by the tritium bombard the phosphor causing it to produce illumination.
Is there any radiation from these signs? No. Tritium emits a beta electron which cannot even penetrate a piece of paper. The tubes in signs which contain the tritium are shock-mounted inside a high-impact plastic case designed to be tamper and vandal resistant. A high-impact acrylic shield across the face of the sign provides additional protection and serves as another barrier against accidental damage.
What if a tube breaks? If both the protective shield and case are penetrated and a tube is broken, releasing the tritium gas, there is no hazard. Because it is hydrogen and therefore lighter than air, when released, the tritium gas is dispersed rapidly and harmlessly into the atmosphere to join the naturally occurring tritium already present. In the highly improbable event that all of the multiple tubes should fracture, the effect is still less than half of that received from naturally occurring radioactive sources during a year, and is similar to the difference between living at sea level and moving to an elevation of 5,000 feet.