Using vacuum food sealers as a low-cost vacuum pump

摘要

Avacuum pump provides many entertaining, edu-cational, and attention-getting demonstrationsand experiments at all levels. Most pumps, however,are expensive, heavy, and noisy, which may limit their availability both in the classroom and for the indepen-dent experimenter. The proliferation of inexpensivevacuum food sealers removes many of the barriers toperforming many vacuum demonstrations.