Miniature Absolute Pressure Transducer

It is well known how expensive it is to run and conduct tests in a hypersonic wind tunnel. With air speeds of greater than mach 4 and as high as mach 10 the environment can often be very hostile. Because of the great difficulty of conducting measurementsunder these extreme conditions, any transducer so employed must be very small, very rugged, and able to obtain highly accurate data. It should be easy to install and remove, should not require re-calibration, should not require extensive pneumaticinterconnects or long electrical wiring, and should, ideally, be low cost. Kulite is proposing to develop a miniature piezoresistive transducer of approximately .1 cubic inches in volume. The full-scale pressure of the proposed transducer will be 5 psiaand suitable methods will be developed to obtain accuracies of .0025 psia. The sensor will be fabricated using Kulite's latest