Optical Pyrometer is used for non-contact measurement of high temperatures of incandescent objects in the range 800°C to 2300°C. The temperature measurement makes use of visual comparison between the brightness of an electrically heated and calibrated incandescent filament (reference light bulb) in the Optical Pyrometer and that of the object to be measured. Once the brightness becomes same, the filament seems to disappear and the Temperature can be read on the LCD display. Due to its appropriate design, the simple measuring principle used and the convenience of its operation, high accuracy measurements can also be carried out even by less skilled operators. An additional advantage is the suitability for carrying out measurements on very small surfaces of upto 2 mm diameter at a measuring distance of 60 cm. Optical Pyrometer is suitable for measuring high temperature in annealing and hardening furnaces, in firing kilns, of molten and flowing metal or glass as well as incandescent blocks during forging, pressing or rolling. Two models are available with different temperature range to suit varying applications.