About Self Powered Safety Products
Self Powered Safety Products Limited, known as SP2, is a British company dedicated to the development and supply of self-illuminating markers and tactical devices for those whose activities are carried out at night.
Our goal is to make night operation and navigation safer, easier and more efficient. Our radioluminescent devices do not require any charging or switching. Unlike photoluminescent and chemiluminescent devices, they will continue to glow for many years, even during prolonged periods of complete darkness.
No external power supply is needed so there is no need to check and replace batteries or maintain a mains power supply. Nor is any maintenance required. Therefore, the cost of ownership for users is very competitive. Our range of products extends from simple Kit Markers through Map Readers and Prismatic Compasses.
Each product incorporates one or more self-luminous trigalight® light sources, enabling users to use the device quickly and easily in the dark.
The technology
The radioluminescent light emitted by a trigalight® can be produced in several colours in the visible spectrum (green, yellow, orange, red, blue, ice-blue, white, purple and pink) as well as in infra-red. Light output is linear and follows a straight line to a half-life of 7 years. They require no external electrical supply (from mains or battery) nor do they need to be charged by ambient light. Trigalight® performance is predictable through their service life whether or not installed in permanent darkness and irrespective of weather conditions.
How safe is a trigalight®?
Because a trigalight® is non-emissive and utilises very low levels of energy, they are safe to use in a wide range of applications. For example, GTLS technology is type-approved for use in fire safety signs for the workplace under HSE Certificate of Approval No TA2.
Gaseous tritium produces electrons that are of sufficiently low energy as to be unable to breach a sheet of paper or to penetrate human skin. Nevertheless, care must be taken when handling these devices to avoid breakage and subsequent ingestion of residual gaseous tritium. Detailed information addressing aspects of human safety relating to GTLS is available upon request.
