QCM SENSOR APPARATUS

PROBLEM TO BE SOLVED: To overcome the problem that the condition under which a solution is stirred within a vessel is unstable, a probability of a to-be-detected material encountering a QCM sensor provided at the bottom of the vessel is decreased, and it is hard to obtain a QCM sensor apparatus having a stable performance although there is a method for swinging the vessel or a method for immersing a propeller into the solution within the vessel in a structure of a conventional QCM sensor apparatus when the solution is stirred within the vessel. SOLUTION: In the QCM sensor apparatus of the invention, a stirring element can be restricted to a location at which it does not contact a piezoelectric oscillator. The stirring condition can be constantly maintained by rotating the stirring element by a magnetic stirrer. The QCM sensor apparatus having the stable performance can be obtained without a decrease in the probability of the to-be-detected material encountering the QCM sensor provided on a substrate. COPYRIGHT: (C)2009,JPO&INPIT