Patent ID: 9645115
Date: 2017-05-09
CPC Classifications: G01N

Claim:
1. A QCM sensor for detecting a physical quantity of a sample by allowing the sample to contact an excitation electrode on a surface of a quartz crystal vibrator, comprising: a quartz crystal vibrator for measurement having a first electrode which can be contacted by a measurement sample to be detected and having a first quartz substrate with a surface on which the first electrode is formed; a quartz crystal vibrator for reference having a second electrode which can be contacted by a reference sample as a reference when detecting a physical quantity of the measurement sample and having a second quartz substrate with a surface on which the second electrode is formed; a housing accommodating the quartz crystal vibrator for measurement and the quartz crystal vibrator for reference, the housing having opposite ends and an opening in one of the ends through which the first electrode is exposed for contacting the measurement sample; and a confining portion at the other end of the housing and confining the reference sample in the housing in a state of contacting the second electrode.