A new transducer has been developed that will measure pressure over a wide range by sensing the damping of a vibrating diaphragm immersed in the gas whose pressure is being measured. It is capable of measuring pressures from approximately 10−5 to 200 mm Hg with an accuracy of about 1% over a large portion of the range. The device overcomes many of the shortcomings characteristic of other gauges; it is small and rugged, with a fast response time at low pressures, and lends itself well to automatic operation.
CaCN )The extension of the FM telemetry technique to provide simultaneous CN O 2 a=o measurements of four forces acting on a free-flight aerodynamic model COb'collector-to-base plus collector stray capaciis reported. Developments and procedures required to achieve the tance accuracy, linearity, and stability necessary for obtaining dynamic C, total effective capacitance in the tuned cirstability coefficients are described. System accuracy is believed to be cuit IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
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