Optical Pyrometer - CellaPort® PT 135 (600 – 3500 °C)

The CellaPort PT 135 has a very short-wave and narrow-band spectral sensitivity. Therefore, the pyrometer reacts to interfering influences such as signal weakening by dust, vapour or smoke in the pyrometer's field of view, to soiling of the protective window as well as to fluctuations in the emissivity of the measuring object much less than a conventional spectral pyrometer. Metals have the physical property that the emissivity increases with shorter radiation wavelengths and higher object temperatures. Therefore, the CellaPort PT 135 is ideal for precise measurement of metals and very hot objects. In addition, the pyrometer is used to measure thin semiconductors, as semiconductors have very good radiation properties in the pyrometer's special spectral range. For wavelengths > 1 µm, silicon is transparent, so a standard pyrometer would measure the temperature of the material behind it through the silicon.