Ratiometric Temperature sensors and transmitters that have a 0.5V to 4.5V output.
Out range of Ratiometric Temperature sensor use sensor elements such as thermistor , PT1000 or PT100. internal electronics calibrate and convert the raw sensor element into a Ratiometric output.
View our article on the Ratiometric output

The ETP21 Ratiometric Temperature sensors use PT100 sensor technology