Thermal Expansion Apparatus D
3B SCIENTIFIC® PHYSICS
U15400 Dilatometer/linear expansion apparatus
Instruction sheet
3/03 ALF
®
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The dilatometer is for the proof and quantitative determination of linear expansion of solid materials as a
function of material, length and temperature.
1. Safety instructions
• Caution. The experimental procedure results in hot
steam.
• Do not touch heated tubes with your fingers. Use
cloths when replacing tubes.
• Do not subject the glass tube to mechanical stresses.
1 Fixed mount with screw for securing tube and securing screw
2 Screw for stand (see Fig. 2)
3 Base strip
4 Spring clip for securing hose
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Guide mount with gears for pointer
6 Testing tubes
7 Pointer
8 Scale
are three testing tubes made of steel, brass and glass.
Suitable for projection using a daylight projector (see
Fig. 2).
Dimensions: 730 mm x 50 mm x 200 mm
Scale dimensions: 140 mm x 200 mm
Scale: 140 mm x 200 mm
Measuring range: 1 mm
Accuracy: 0.05 mm
Length of tube: 650 mm approx.
Weight: 2 kg approx.
2. Description, technical data
The dilatometer consists of a base strip with fixed mount,
guide mount, pointer and projectable scale. Also included
Figure 1
3. Principle
To determine the linear expansion coefficient α for
various materials, it is necessary to measure the ex-
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