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 ...

Designing an analog circuit can be a frustrating experience, as noted by Nick Cornford in his Design Idea (DI), “DIY RTD for a DMM.”With a fortnight’s struggle, I completed the design of 4 mA to 20mA, ...