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Gastec Irritant Smoke Tubes for Respirator fit testing & Airflow indication
(6 per box) (smoke tubes are reuseable when capped)

Irritant smoke is the only OSHA-accepted qualitative fit testing method that does not rely on the test subject’s subjective response. Other types of qualitative fit tests, such as banana oil (Isoamyl acetate), saccharin, or Bitrex, may cause false negative results.
Irritant smoke tubes for airflow indication is simple and effective for tracing and determining the source, direction, and dispersion of air currents. The highly visible white smoke provides an immediate and obvious cue to the directional pattern of air currents.