Instruction sheet – 3B Scientific Baroscope User Manual

Page 2

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Instruction sheet

3B SCIENTIFIC® PHYSICS

U21853 Baroscope

7/03 ALF

®

The baroscope is used to demonstrate the effect of buoy-
ancy on an object in air.

1. Safety instructions

• Check the vacuum bell jar for damage before con-

ducting the experiment.

• Defective vacuum bell jars can result in implosions.

2. Description, technical data

The baroscope consists of a balance beam mounted on
a metal base on whose cross balance beam a styrofoam
sphere is suspended from an eyelet. At the other end of
the balance beam there an adjustable counterweight to
establish equilibrium.

Styrofoam sphere:

50 mm Ø

Base:

120 mm x 90 mm

Height:

125 mm

3. Operation

• Place the baroscope on a vacuum experiment plate.

• Adjust the balance beam so that it is in a state of

equilibrium under atmospheric pressure.

• Cover it with the vacuum bell jar and evacuate the

chamber.

• Styrofoam sphere falls due to the drop in air buoy-

ancy.

Additionally required:
1 Chamber e.g.

Vacuum experiment plate U21850
and vacuum bell jar U21851

1 Vacuum pump e.g.

Membrane pump U14502 or
Vacuum hand-operated U20500 or
Water-jet pump U16050

1 Vacuum hose e.g. U10140

1

Base

2

Stand rod with pivot

3

Styrofoam sphere

4

Balance beam

5

Counterweight

2

3

1

4

5

3B Scientific GmbH • Rudorffweg 8 • 21031 Hamburg • Germany • www.3bscientific.com • Technical amendments are possible

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