Research Article

Using CO2 to Determine Inhaled Contaminant Volumes and Blower Effectiveness in Several Types of Respirators

Figure 4

Flows and volumes for the SE 400 breath-responsive PAPR. Blower flow rate was adjusted to maintain positive pressure inside the face piece. Corresponding contaminant volumes (below) were negligible.
402148.fig.004a
(a)
402148.fig.004b
(b)