New absolute high pressure gauge
A new absolute pressure measurement system based on the simultaneous measurement of length and ultrasonic transit times is described. The system was used to determine the transition pressure of pure mercury at 0 deg C at 7571.2 plus or minus 1.6 bars. It is particularly advantageous to use a device for calibrating secondary gauges such as manganin gauges inasmuch as it gives a highly accurate measurement of nonlinearities in such secondary gages. The gage calibrated in the present study reaches a maximum deviation from linearity of 11.6 bars at a pressure midway between atmospheric pressure and the 0 deg C mercury melting pressure. (auth)
- Research Organization:
- Cornell Univ., Ithaca, N.Y. (USA). Dept. of Materials Science and Engineering
- NSA Number:
- NSA-29-004736
- OSTI ID:
- 4392144
- Report Number(s):
- COO--3153-98
- Country of Publication:
- United States
- Language:
- English
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