Resistive temperature sensors (RTD) with connection head

Temperature sensors with a connection head are the most commonly produced temperature sensors in the industry. In processes, they are measured in gases, liquids and vacuum.
They consist of a protective hose attached to the connection head, either directly or with intermediate process connections. The head contains a ceramic base or transducer, with contacts for connecting the connecting cable. The connection head has a lead-in for the entry of the connection cable. The sensor or thermocouple is built into the protection tube and connected to the contacts. This can be done directly or as an exchangeable stake.
And this is where the story begins. Because every user needs a temperature sensor tailored to his or her devices and processes, manufacturers produce them in an infinite number of versions, in different accuracy and durability classes, in different price ranges, in different temperature ranges, in different material classes. What looks the same/similar is not necessarily so. Small difference in workmanship = big difference in measurement.