  We present high resolution thermal expansion measurement data obtained with
high relative sensitivity of $\Delta$L$/$L = 10$^{-9}$ and accuracy of
$\pm$2$\%$ using closed cycle refrigerators employing two different
dilatometers. The data quality is in excellent agreement with those obtained
using wet liquid helium based systems, demonstrating great technological
possibilities for future thermal expansion measurements in view of the
depleting resource of liquid helium. The cryogenic environment was achieved
using two different cryostats that use pulse tube and Gifford-Mcmahon coolers
as the cryocoolers. Both the dilatometers employ a spring movement for
achieving the parallel movement of the capacitor plates. $Dilatometer \#1$ was
built in-house based on a published design while $dilatometer \#2$ was obtained
commercially. Cell calibration for $dilatometer \#1$ was done using copper and
minimal deviation of the cell effect from the published values were found.
Linear thermal expansion coefficient $\alpha$ obtained using both dilatometers
was evaluated using two different techniques, namely, numerical differentiation
and derivative of a polynomial fit. The resultant $\alpha$ obtained for metals
silver and aluminium showed excellent match with published values obtained on
systems using wet cryostats. Finite element method simulations were performed
for understanding the spring movement in each dilatometer using which the
effect of different forces$/$pressures on the displacement of the spring was
studied. Finally, we report thermal expansion measurements done on single
crystals of two high temperature superconductors
YBa$_2$Cu$_{3-x}$Al$_x$O$_{6+\delta}$ and Bi$_2$Sr$_2$CaCu$_2$O$_{8+x}$ along
the c-axis and found very good match with published data obtained using wet
liquid helium based cryostats.
