Measuring in a range from 600 to 2000°C (1112 to 3632°F), the NIR-Borescope-640 (NIR-B-640) provides a high-resolution thermal image with real-time, continuous, high-accuracy temperature readings. It utilizes the latest wide dynamic range imaging technology, providing the highest available temperature reading accuracy over the entire wide temperature range, for accurate, continuous temperature profiling of the furnace and stock. The NIR-B-640 uses advanced near-infrared spectral filtering to provide a clear view into the furnace gases, allowing highly accurate temperature measurement point data to be taken, stored, and trended over the lifetime of the furnace. An advanced near infrared spectral filtering system provides a clear view through the furnace gases, allowing highly accurate temperature measurement point data to be taken, stored and trended over the lifetime of the furnace. With specially designed image and data processing software that supports long-term data trending, the NIR-B-640 is ideal for applications in cement kiln and cyclone furnaces, reheat furnaces, continuous casting (zone 1), heat treatment and annealing furnaces.