An InSb (Indium Antimonide) detector is a type of infrared sensor often used in MWIR (Mid-Wave Infrared) thermal cameras. It’s a semiconductor material that is highly sensitive to infrared radiation, specifically in the 3 to 5 micrometer wavelength range. InSb detectors are known for their excellent performance in detecting heat from hotter objects, such as engines, industrial equipment, and military targets. These detectors offer high resolution and sensitivity, making them ideal for applications that require precise thermal imaging.