The FM200 Extinguishing System 6515 sign alerts people's attention to the fact that they are about to enter a hazardous area. The sign also provides specific instructions on what a person should do if the system were to discharge or they were to hear an alarm.
The sign states that a person should refrain from returning into the area, until it has been sufficiently ventilated. If you do use this system, make sure everyone will be aware of these instructions.
Fixing requires anything as simple as sticky pads, 'No-nails' type adhesive or double-sided tape.