The Melexis pyrometer has a digital interface and can't be connected to a thermometer designed for usual RTD or TC sensors.
But there's a basic problem in measuring metal surfaces with pyrometers, particularly at "low" non-blazing temperatures. Clean (shiny) metals have a low emissivity, they tend to show rather a reflected ambient temperature than their own surface. The emissivity can be calibrated, but it must be expected to vary depending on the surface condition, e.g. dirt and oxide presence. So the contactless IR measurement will be rather inaccurate.
A spring loaded contact thermometer (e.g. a capillary thermocouple) is most likely a better solution.