Abstract
This paper discusses the technological processing of the gold–chromium (with 1.95±0.05% Cr) alloy pressure gauge, optimized to get the best metrological properties. It also presents experimental results of thermal and pressure measurements of the alloy. It was found that the Au–Cr pressure gauge, properly seasoned in the controlled seasoning process, is completely free of hysteresis in resistance due to pressure changes, with uncertainty of less than 0.4 bar in 6000 bars range. Resistance-pressure and resistance-temperature characteristics didn’t change during the pressure or temperature cycling. It is also shown in the paper that there is a possibility of employing Au–Cr pressure gauges for measurements of high pressures up to about 20 000 bars.
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