Radiation

Warning Signs for Radiation and Laser Areas

Radiation warning signs mark places with a radiation source, such as X-ray and imaging rooms, nuclear medicine units, industrial radiography areas, laboratories and laser cutting workshops. Radiation cannot be seen, heard or felt, so the sign on the door is often the only thing that reveals the hazard.

Radiation Signs in This Category

• Ionizing radiation: trefoil symbol signs for radioactive material, ionizing radiation and additional radiation warnings.
• Optical radiation: laser beam, UV, IR, visible and optical radiation warnings, most of them bilingual Turkish English.
• Non-ionizing radiation: a caution sign for electromagnetic field sources.
• Dosimeter signs: personal dosimeter must be worn in this area and always keep your dosimeter on.
• Protective equipment: use lead gloves and use radiation gloves signs.
• No entry signs: no entry for pregnant women, people with pacemakers or prostheses, and no watches or metal objects.

Ionizing vs Optical Radiation

Ionizing radiation such as X-rays and gamma rays can cause lasting tissue damage, so the dose received by staff is tracked with dosimeters. Optical radiation such as lasers, UV and IR is especially dangerous for the eyes and skin. For both, the warning sign should be used together with signs showing the protection required and who must not enter.

Materials and Placement

Put signs at every entrance to the area so they are seen before the door opens. Choose 3 mm PVC (dekota) or galvanized steel for walls, and vinyl stickers for equipment housings and doors.

Frequently Asked Questions

Why are radiation warning signs yellow and black? A yellow background with a black symbol is the standard hazard warning style that people recognise from a distance.

Which sign does a laser cutting machine need? A laser beam warning sign at the machine and at the entrance to the work area, combined with an eye protection sign where needed.