Typical RTD assemblies use a head chamber design. See below for a summary of issues with this design. Many of ifm’s temperature instruments consist of a fully welded 316 stainless steel IP69K hermetically sealed construction. The fully calibrated and ready-to-install one-piece design solves all of the typical drift issues of head chamber systems.
Other benefits of ifm’s one-piece construction include:
One of the most common construction methods of temperature instruments is the head chamber assembly. It consists of a probe body, process connector, joining nut, head chamber, and either a terminal or a transmitter terminal puck. These individual components are fitted together and hand-wired to screw terminals.
The completed assembly has several drawbacks: