SOLUTION

The material used for the thermocouple is

Chromel-Copel = −200°C to +800°C

Iron-Copel = 0°C to +800°C

Copper-Copel = −200°C to +300°C

Chromel-Alumel = −200°C to +1300°C

Platinium-Rohdium = 0°C to 1400°C

Tungsten-Rhenium = 0°C to 2320°C

Copper-Constantan = −200°C to 900°C