Description
SP4-0489
The Space Tube is a modern
replacement for the Bell in a Bell
Jar Apparatus. A 90mm diameter
acrylic tube houses a batteryoperated, high output piezo
sounder. When the end plates are
attached and the unit connected
to a vacuum pump no sound can
be heard but the sound returns
when the air is allowed back in. An
effective demonstration with none of
the complications of the traditional
apparatus. Overall length 150mm.
Vacuum pump not included.
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