Presentation of the developed pyrometers

Objectif : To develop appropriate Sensors to be applied in High Temperature Industrial Processes. Typical requirements : Large temperature scale (300 - 5000 K), High temperature gradients (100-1000 K mm-1) High heating and cooling rates (103-109 Ks-1), Different size of heat affected zone (0,1 - 20 mm), Parasitic radiation (laser plume, arc plasma, etc.), Variation of material thermal and optical properties (in particular emissivity) as a function of temperature, Control of small temperature deviation ± 5 K

The pyrometers performance data

The 2D monocromatic pyrometer can measure brightness temperature at a single wavelength (filter with the effective wavelength l = 0.86 µm and 50 nm spectral bandwidth) applying any number of photodiodes from 1 to 100 from rectangular matrix (10x10). For example, applying a line of photodiodes it is possible to measure temperature profile; applying all 100 photodiodes it is possible to obtain 2D temperature distribution. The measurements by different photodiodes are carried out consecutive. It means that if the sampling time for a single photodiode is 17 µs, the duration of measurements by a line of 10 photodiodes is 170 µs and for the total matrix (100 photodiodes) it is 1.5 ms.