RTD sensors are used to measure temperature by changing resistance proportional to the temperature. RTD’s are designed with basic temperature elements as well as fully packaged assemblies. These so called RTD probes consist of a RTD sensor element, a sheath or housing, an epoxy or filler, extension leads and sometimes a connector or termination. Various sensor materials are available based on customer requirements for material compatibility, accuracy, and measurement range. Standard packages as well as custom designs allow for the flexibility to design the most suitable RTD temperature sensors for a variety of applications.