This ping pong ball in a tube to monitor our surgical suite's positive pressure. : r/mildlyinteresting
Wilger Visual Ball Flow Indicators – Wilger
ToolGuyd - Saw this "Ball in the wall" airflow indicator the other day. Simple, yet effective at demonstrating whether a room has negative pressure for dust containment. #tools #toolguyd #renovation | Facebook
Airflow Direction Inc. - Laboratory Animal Science Buyers Guide
Wilger Visual Ball Flow Indicators – Wilger
ISOLATION
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Foot Pump With Pressure Gauge 50621 The Sports Ball Inflation Pump Lot Of 3 New 721535209477 | eBay
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