Cryogenic pressure-temperature and level-temperature sensors

Integrated cryogenic pressure-temperature, level-temperature and flow-temperature sensors have several advantages over the conventional single parameter sensors. Such integrated sensors were not available until recently. Pressure Systems, Inc. (PSI) of Hampton, Virginia introduced precalibrated precision cryogenic pressure sensors at the Los Angeles Cryogenic Engineering Conference in 1989. Recently, PSI has successfully completed the development of integrated pressure-temperature and level-temperature sensors for use in the temperature range 1.5-375 K. In this paper, performance characteristics of these integrated sensors will be presented. The effects of irradiation and magnetic fields on these integrated sensors will also be reviewed.