Progress of Cryogenics and Isotopes Separation , ISSN: 1582-2575
2000, Volume 3, Issue 5+6

Comparative Study About the Behavior of Carbon Resistance Temperature Sensors at Low Temperatures

Abstract

The paper presents the behavior offour carbon resistance sensors, which don't have a calibration curve comparatively with two calibrated sensors. In this way, we put all this sensors into a column cooled by a hydrogen cryogenerator type Phillips. For high accuracy measurements, a PC achieved the process data with a data acquisition board incorporated. The experiment consists from three cooling-heating cycles that allow studying the time stability of characteristics for the sensors. The experimental data was used to draw the Rf17 and errors curves for one cooling-heating cycle. In addition, we find the polynomial regression for the sensors that don't have a calibration curve. As conclusion it results that the carbon resistance sensors have a higher accuracy at low temperature and time stability is very good.