This
device uses the method of heating up the inner side of the sample to measure
the coefficient of linear expansion.  It has a screw to connect the
digital thermometer in the middle.  At both ends, there are injection
ports to inject the steam.  In the measurement and supporting plates,
there are pins to support the sample so that the expanded length can be measured. 
There are 3 sample holders for easy keeping and for comfortable usage during
experiment.  

Sample prop(1)

760mm, long
extruded aluminum

with built-in dial gauge

Metal tube(3)

750mm, outer
dia.15mm

Steel(1), Copper(1), Aluminum(1), with built-in thermistor

Silicon Tube(2) : appox.
1m, 6mm(ID), 10mm(OD) 

Steam
Generator(1) : SG-7304, 220V/60Hz

Silicon
Tube(2) : appox. 1m, 6mm(ID), 10mm(OD)

Digital Thermometer(1) :
Cat. 25