What type of sensor element is used in the STR300?
The HVAC European+Sensors+Catalogue.pdf on the Extranet, as well as the datasheet for the STR300 Series says that the sensor element is PT100 Class B.
The actual sensor element for the STR300 that are made today is NTC Thermistor 10 kOhm.
The output from the STR300 is 4-20 mA.
The documentation will be updated shortly.