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Since 1977

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P.O. Box 219 Batavia, IL 60510

Phone 800-452-1261
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Item #: AP5713

Price: $16.35

The Pulse Glass provides a dramatic demonstration of heat transfer with only the heat from your hand. 

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This item can only be shipped to schools, museums and science centers

Product Details

Dramatic demonstration with only the heat from your hand. Two glass bulbs are connected with a glass tube and contain a colored, volatile liquid. Holding one of the bulbs in your hand causes the liquid to boil and the vapor to move into the other bulb where it bubbles rapidly.

Caution: Never use with any heat source warmer than body temperature.