The Scott Proflow 3 Powered Air Purifying Respirator (PAPR) is ideal for first receivers and first responders to use in extended duration, non-IDHL environments, such as decontamination. The unit’s “intelligent power” microprocessor constantly monitors and adjusts airflow to compensate for changes in filter load resistance, to ensure adequate, easy-to-breathe air.Scott Health & Safety, Monroe, NC.