| 摘要 |
PROBLEM TO BE SOLVED: To measure various measuring objects with high accuracy.SOLUTION: A true density measuring device 10 which measures true density of a sample 100 by a gaseous phase substitution method includes: a sample chamber 30 which houses the sample 100 and is pressurized by introduction of inert gas; and an extension chamber 50 from which the inert gas filling the sample chamber 30 is released. The extension chamber 50 is opened and closed with a lid 42 which may be detached and attached in a normal use state, and capacity is changed by taking a capacity change member 55 in and out. |
