Figure 1: Solid sheath RTD or thermocouple temperature sensors. When metals of different composition come into contact, they form a junction that produces a voltage in the millivolt range. If the ...

Magnesium oxide (MgO) or aluminum oxide (Al 2 O 3) powder is packed into the sheath as an insulator to the RTD or thermocouple sensor and lead wires. The sheath end cap is welded closed, and a ...