In case of: generic monitoring of the temperatures, correlation between temperatures  and monitoring systems; OTR suggests temperatures probe converter PT100 or NTC.

Made up by a little dimentions circuit, it presents a couple of terminal blocks on: for the input PT100 and 3 wires and 1 of output 4-20mA with 2 wires.

How is it installed?                                         

The installation is a simple wiring from the probe to the converter.