A transportable sealed cell was designed for a thermometric fixed point device at low temperatures, which is made of copper and filled with a pressurized sample gas. Two types of cryostats, an adiabatic cryostat for precise measurements and a commercially available refregerator for practical use, were employed for realization of the triple points; e-H₂, n-H₂, Ne, O₂, N₂, Ar, Kr, Xe, CO₂ and CH₄. The precise realizations indicated that the triple points examined were reproducible to ±0.2mK on several runs for different cells. A practical method for realization with an accuracy of ±10mK were also examined for argon and neon. All results obtained showed that the sealed cell is a useful device as a reference standard of temperature both for precise measurements and for practical use.