Industrial Platinum Resistance Thermometer (IPRT) and SPRTs
• IPRT is a standard for temperature measurement and calibration, with a resistance of 100 Ohms at 0°C. • All PRTs use coil type temperature sensors suitable for different temperature ranges. • IPRTs can be calibrated with uncertainties of 0.01 °C at 0°C and 0.05 °C at 660 °C, but not lower than 0.01 °C due to sensing element limitations. • SPRTs can be calibrated to lower uncertainties than IPRTs, with Primary SPRTs calibrating to uncertainties of 0.0001 °C at 0°C and 0.002 °C at 660 °C. • Primary SPRTs require the most care, while secondary SPRTs can calibrate to low uncertainties. • Eurocaltech offers high accuracy precision thermometers with a one-year accuracy of 0.004 °C at 0 °C and 0.007 °C at 660 °C. • To make best measurements with SPRTs, a thermometry bridge is necessary, suitable for both secondary and primary SPRTs.