Metrological Characterization of a High-Temperature Hybrid Sensor Using Thermal Radiation and Calibrated Sapphire Fiber Bragg Grating for Process Monitoring in Harsh Environments. - Eisermann, René; Krenek, Stephan; Habisreuther, Tobias; Ederer, Petra; Simonsen, Sigurd; Mathisen, Helge; Elsmann, Tino; Edler, Frank; Schmid, Daniel; Lorenz, Adrian; Olsen, Åge (Sensors, 2022)