optical pyrometer meaning in Hindi

The technician is measuring the temperature with an optical pyrometer.
A metallurgist ( modeled by Emil Weston, 1900 1990 ) measures the metal temperature using an optical pyrometer.
Measuring the combustion temperature of coke in the blast furnace using an optical pyrometer, Fixed Nitrogen Research Laboratory, 1930.
Temperature measurement was initially done by Basset using an optical pyrometer to measure the intensity of the incandescent light from the sample.
These rods are then heated by passing a very large current through them, and the radiation emitted from the hole is observed with an optical pyrometer.

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