Outdoor use stability improvement of the baseline output from a quartz oscillator pressure sensor.

Stability of the output obtained from a pressure sensor using a quartz oscillator for outdoor measurement was improved by the normalization of pressure and temperature changes. Maximum fluctuation ratio, which is the index of the fluctuation, was reduced sufficiently to a practical level by the present pressure- and temperature- normalization. This level corresponds to the degree of the level which shows 0.33% of the output, which is in agreement with the application for hydrogen sensing. [ABSTRACT FROM AUTHOR]