For DIN rail mounting a full line of transmitters has been produced for thermocouple or Pt100 inputs.
They are available with only analogue output, or only trip alarm functions with relay output, but also in combination, so you can have a 4-20 mA output with 1 or 2 individual adjustablesetpoints.
ATEX approved EExi transmitters are available. Isolated versions are available and can have a 0-1 V, 0-10 V, 0-20 mA or 4-20 mA output.