Draft Checker Airflow Detection Powder

Quickly and easily test fume hood exhaust before use.

• A squeeze or two from the plastic bottle releases a cloud of ultra-fine silica powder that stays suspended long enough to see whether the exhaust is working
• Also detects drafts, gas leaks, and air currents in rooms, ducts, and exhaust systems
• Made of inert, non-toxic, non-flammable amorphous silica