Long distance temperature sensing optical cable (GTFJKKH) is a type of fiber optic cable that is placed inside a spiral armored tube. The outer surface of the spiral armored tube is reinforced with aramid and stainless steel wire weaving, and the outer cover is protected with polyethylene material, which is UV resistant, waterproof, and has excellent Raman scattering characteristics. This type of optical cable is widely used in fiber optic distributed temperature measurement systems such as highways, tunnel subways, and cable surface patches.