TEMPERATURE MEASURRMENT TIPS

摘要

Platinum resistance thermometers (PRTs) can provide accurate and stable temperature measurements if they are selected and used properly. Choosing the right platinum resistance thermometer for the application is as critical as the proper use of the device. The three types of PRTs are direct immersion, indirect immersion and surface mount. Direct immersion sensors allow the sensor to be immersed directly into the process (figure 1). They generally provide the most accurate temperature measurement. Indirect immersion sensors use a thermowell to provide additional strength to the sensor or provide a means for removal without interfering with the pro-cess (figure 2). Surface-mount sensors can be convenient to use but offer the most limited accuracy (figure 3). In addition to thermometer type, other factors within the measuring system affect accuracy and can contribute to the accuracy of the measurement. Here are 10 tips that will allow a user to get the most out of their platinum resistance thermometer.