IMAGINE 10 000 TEMPERATURE READINGS MONITORED AT ONE CENTRAL POINT USING ONE FIBRE OPTIC CABLE!
AP Sensing can monitor temperature under harsh conditions over long distances to optimize maintenance, detect fires and overheating, and measuring environmental temperature.
AP Sensing’s linear heat series minimizes your operational costs and performs extremely reliable by using a standard fiber optic cable which has no active components or electronic sensors within the exposed zone. Fiber optic cable is also immune to electromagnetic interference.
Up to 10km of Fiber Optic Cable can be used to sense heat on each 1m section to 1°C accuracy enabling users to monitor 10 000 temperature readings from one central point using one 10km fiber optic cable.
Depending on cable grade, the fiber cable can also be directly exposed to flames while still measuring accurately. Firefighting effectiveness can hence be monitored throughout the fire event.
Distributed Temperature Sensing (DTS) utilizes laser light and fiber optic cables to measure temperature. An infrared laser pulse is sent through the fiber. The incident energy is back-scattered from the glass molecules throughout the entire length of the fiber. These minute light signals contain information about the temperature of the glass at any given point in the fiber, in accordance with the Raman Effect . The back scattered light is measured and then analysed for temperature.
( A quantum mechanical effect first discovered by CV Raman in 1922. Wavelength of light scattered from optical crystals changes and varies as per the temperature of the crystal.)
The position of the temperature reading (along the fiber length) is determined by measuring the time delay of the returning light pulse, similar to a radar echo.