根据本发明的谐振器传感器（100）用于检测气体密度和/或气体组成，特别是在低温温度范围内。 它包括振动舌（110），其中在一个部分中施加有至少一个压电薄膜（120a，120b）并且具有用于保持振动舌的夹持装置。 夹紧装置包括具有凹部（140）的夹紧体（130），振动榫舌的一部分以一种材料锁定的方式插入并连接到夹紧体上。 在20℃下，夹持体（130）具有至少10GPa且至多50GPa的弹性模量。 根据本发明的罐和根据本发明的装置（10）包括根据本发明的谐振器传感器（100）。 根据本发明的方法用于确定气体密度或气体组成并且尤其可以在低温温度范围内使用。

An inventive resonator sensor (100) is a detection of a gas density and / or a gas composition in particular in a cryogenic temperature range. It comprises an oscillating tongue (110) with at least one in a portion applied thereon piezoelectric film (120a, 120b) and a clamping device for holding the oscillating tongue. The jig comprises a jig body (130) having a recess (140) in which a used portion of the oscillating tongue and is integrally connected to the chuck body. At 20 ° C of the chuck body (130) has a Young's modulus of at least 10 GPa and not more than 50 GPa. A tank according to the invention and an apparatus according to the invention (10) comprise an inventive resonator sensor (100). An inventive method serves to determine a gas density or a gas composition and can be applied particularly in a cryogenic temperature range.