A quick and easy way to test the safety of fume hood exhaust before use. Just a squeeze or two from the plastic bottle dispenses a cloud of ultra-fine, lightweight silica powder, which remains suspended long enough to visually check whether or not the fume hood exhaust is functioning properly.
• Useful for detecting drafts, gas leaks and air currents in rooms, ducts and exhaust systems
• Amorphous silica powder is inert, non-toxic and non-flammable
• 1.5 gm bottle