PT100/RTD Temperature Sensors 3mm Dia is to measure temperatures that require improved accuracy over what a thermocouple could offer. Typically connected to temperature controllers, they are 2 wires that can be as 3 wire with a loop.
They are made from Platinum or Nickel because they are very stable and liner over their temperature range. The purer the material, the more consistent and precise reading will be.

Advantages

• More accurate than thermocouples
• Stability
• More linear than thermocouples

Disadvantages

• Power supply required
• Higher costs than thermocouples
• Low resistance value
• Self-heating

Related products:- Thermocouple Sensors- Probes