The most commonly used fiber optic cable for temperature sensing.
Winding a SUS304 with a spring shape to increase the flexibility of the optical cable, the material of the wire reinforcement, such as a mesh shape increase the tensile strength.
External jacket was flame retardant material was prepared by mixing the UV to withstand the ultraviolet rays.

SSLT (Stainless Steel Loose Tube)
Install on-site fast temperature response and fire protection as required.
This is excellent the temperature passes because of narrower as SUS304 tube.

HTOC (High Temperature Sensing Optical-fiber Cable)
Normal coating of the fiber optical cable with PE material has been melted at a high temperature above 100 ℃.
By coating of an optical fiber with a special material in order to solve this problem was built to withstand high temperatures.
After the fire, normall fiber-optic cable is unavailable, but high temperature fiber-optic cable can be used continuously after fire suppression