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This product line includes 36 different models of industrial infrared optical thermometers, operating in nine different spectral bands. The lowest temperature range is -40ºC to 100ºC, and the highest range is 1500ºC to 3000ºC. Spectral bands of the various models are centered at 0.9, 2.3, 3.4, 4.5, 5.1, 5.4, 7.9, 11.0, and 11.5 microns, allowing a wide range of processes to be monitored, including difficult measurements like the internal temperature of molten glass. Special features are available including close focus, air curtains, water cooling, and custom response times.