3B Scientific Thermal Expansion Apparatus D User Manual
Instruction sheet
3
Instruction sheet
3B SCIENTIFIC® PHYSICS
U15400 Dilatometer/linear expansion apparatus
3/03 ALF
®
The dilatometer is for the proof and quantitative de-
termination 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.
2. Description, technical data
The dilatometer consists of a base strip with fixed mount,
guide mount, pointer and projectable scale. Also included
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.
3. Principle
To determine the linear expansion coefficient
α for
various materials, it is necessary to measure the ex-
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
5
Guide mount with gears for pointer
6
Testing tubes
7
Pointer
8
Scale
3
4
4
1
2
8
7
6
5
Figure 1