What is a Self-Contained Breathing Apparatus (SCBA)?

A Self-Contained Breathing Apparatus (SCBA) is specifically designed to provide the user with breathable air in environments that are immediately dangerous to life or health, such as those with toxic gases or insufficient oxygen. This device is carried by the person using it, allowing them to operate independently from external air sources. The SCBA includes a tank of compressed air, a regulator to control air flow, and a facepiece that protects the user's respiratory system, facilitating safe movement and work in hazardous situations.

In contrast, while some options describe elements related to hazardous environments or personal protective equipment, they do not accurately encapsulate the full functionality and purpose of an SCBA. For instance, while a mask has a role in respiratory protection, it might not be self-contained or include an air supply. Similarly, external air supply devices and gas detection tools serve different functions and do not qualify as self-contained systems intended solely for safe air supply for an individual user.