Contents:– Underlying Methodology for a Thermal Process Monitoring System for Wire and Arc Additive Manufacturing; Two-Color-Thermography for Temperature Determination in Laser Beam Welding of Low-Melting Materials; Measuring the Cooling Behavior of Melt Pools in L-PBF by Pyrometry; Development of A Multi-Spectral Pyrometry Sensor for High-Speed Transient Surface-Temperature Measurements in Combustion-Relevant Harsh Environments; Pyrometrical Interlayer Temperature Measurement in WAAM of Thin Wall; Infrared Thermography for Temperature Measurement and Non-Destructive Testing; A Comparative Review of Thermocouple and Infrared Radiation Temperature Measurement Methods during the Machining of Metals; Development of a Novel Pyrometer by Eliminating the Uncertainty of Emissivity Using Reflector with Two Apertures in Medium Plate Rolling Process; Online Pyrometry Calibration for Industrial Combustion Process Monitoring; Automation and Control of Thermal Processes in the Furnace