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  • Alarms designed to activate audible (i.e., sound) and/or visual warnings when a hazardous condition beyond a threshold level in a closed environment is detected. These alarms usually consist of a detector, appropriate transducers to generate an electrical signal, amplifiers, separate electric power systems and/or batteries, and sound and/or light sources that deliver signals (e.g., high-pitched sounds, intense flashing lights) to warn people that the hazardous condition is present. Alarms intended to be fixed in a particular room providing only emergency signals locally and alarm systems intended for a complete facility that may also include remote alarms (e.g., police and/or fire stations) are available. Environmental emergency alarms are used in healthcare facilities for detecting a variety of hazardous conditions, including fire, smoke, carbon monoxide, explosive and toxic gases. Alarms intended to be fixed in a particular room providing only emergency signals locally and alarm systems intended for a complete facility that may also include remote alarms (e.g., police and/or fire stations) are available. Dedicated alarms intended for fire and/or smoke, carbon monoxide, and other hazardous conditions are also available. Emergency alarms may be used also to activate safety (e.g., unlock doors) and/or protection (e.g., sprinklers) mechanisms.
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