Types of Pyrometer
Optical pyrometer:
this method compares the intensity of light from the filament of a lamp. Current flow from the lamp can be adjusted, using a variable resistor, to match the light
from the furnace. When the filament seems to ‘disappear’, a temperature reading can be taken.
Thermo-electric pyrometer
A galvanometer measures the electrical current generated by a rise in temperature of two dissimilar metals joined together. A temperature output
is converted from the electrical units.
