QUARTZ TUNING FORK MANOMETER

The quartz tuning-fork manometer has a tuning-fork crystal, which is held in a protective housing and in turn is part of a self-oscillating feedback loop. According to the invention, the protective housing (3) is inserted by means of a casting compound (4) or directly into the housing of a measuring head (1) or into a holder, which latter can be inserted, for its part, into the measuring head, a suspension that is as ideally rigid or elastic as possible optionally being provided. A measuring circuit (20) is arranged directly in the measuring head near the tuning-fork crystal (2) and coupled to the latter in terms of temperature. The measuring circuit (20) preferably has a temperature correction network that is decoupled in terms of RF from the feedback loop containing the tuning-fork crystal.