How does an SCSR function in relation to exhaled carbon dioxide?

An SCSR, or Self-Contained Self-Rescuer, is designed to provide breathable air in environments where there is a lack of oxygen or the presence of toxic gases. A critical function of an SCSR involves managing carbon dioxide exhaled by the user. By trapping carbon dioxide, the device prevents the user from rebreathing it, which would lead to a buildup of CO2 in the body and could result in hypercapnia, a condition caused by excess carbon dioxide in the bloodstream.

This trapping mechanism is essential for maintaining a safe air supply for the worker using the SCSR. By ensuring that exhaled carbon dioxide is effectively removed from the immediate breathing space within the device, the SCSR allows for a continued supply of fresh air to the user, extending the time they can remain safe in hazardous conditions. Understanding how the SCSR traps carbon dioxide highlights its importance in emergency situations within mines.