What filters do I need for fume/mist?

(assuming the mist from the Bitrex® is meant here) a high efficiency particle filter would be suitable. However please note that the fit tester must be able to communicate with the test subject and wearing a respirator will limit the testers ability to carry out the test correctly. As the qualitative test uses a hood around the subject’s head, the tester should not be exposed to the test solution.