An NMR apparatus, sample contained in a sample holder is ejected from an NMR probe to the top of the magnet region where a sample latching mechanism holds the sample in place without requiring a continuing flow of pressurized gas, electrical power or other outside force. The sample can then be removed and/or exchanged with another sample that is also held in place without the expenditure of gas. When ready the operator depresses a lever arm enabling the exchanged sample to move into the probe.