Quartz-resonator pressure gauges: Temperature performance

The force frequency effect in quartz resonators was utilized as a transducer mechanism in various realizations and, in particular, successfully commercialized as a pressure transducer. The need for a very precise (0.01 psi pressure uncertainty at 10,000 psi) pressure transducer to operate at high temperatures (275 to 3000C) in geothermal environments necessitated further development efforts directed to improve performance. The incorporation of the rotated X-cut into a pressure transducer, represents one such development effort.