The ProFibre Distributed Temperature Sensing (DTS) system connects to a distributed fibre optic cable and determines temperature and distance data at thousands of points along the length of the cable. The fibre optic cable acts as the sensing element.
The ProFibre Sensor Control Unit is responsible for generating alarms based upon the calculated temperature profile. The ProFibre DTS can detect the location of a hot spot on a 5km length of fibre optic cable with. The system is able to monitor multiple hot spots, the physical distance along the fibre, temperature and also in real-time.
APPLICATIONS
- Cable tray, Cable tunnel, Cable trench, High-voltage cable;
- Highway tunnel, Subway tunnel, Dam;
- Rail tunnel, Utility tunnel;
- Conveyor belt, Coal conveyor, Coal storage yard;
- Oil tank, Gas tank, Oil convey pipeline, Gas pipeline;
- Warehouses etc.
TECHNOLOGY PRINCIPLE
DTS utilises the Raman effect to measure temperature. An optical laser pulse sent through the fibre results in some scattered light reflecting back to the DTS, where it is analysed. The intensity of the Raman scattering is a measure of the temperature along the fibre. The Raman anti-Stokes signal changes its amplitude significantly with changing temperature.
The position of the temperature reading is determined by measuring the arrival timing of the returning light pulse similar to a radar echo. This method is called OTDR (Optical Time Domain Reflectometry).
Introduction of DTS Optic Fibre Controller
There are 2 models of optic fiber controller : WT-GL-100 (wall-mounted type) and WT-DTS-7000 (rack-mounted type).
Technical Parameters
Model
Number of channels
Operating temperature setting
Temperature accuracy
Temperature resolution
Test Frequency
Measuring Distance
Number of relays
Type of ports
Working Temperature
Storage Temperature
Working Power Supply
Working humidity
Maximum length of each channel
Oversize (WxHxD)
Technical Data
WT-GL-100
4
-40~ +120°C
±1°C
±0.1°C
2s/Channel
0~20km
24
USB/RS232/RS485
-10°C~ +50°C
-20°C~ +60°C
DC 24V
≤96% non-condensing
5km
432mm*528mm*180mm
Technical Parameters
Model
Number of channels
Operating temperature setting
Temperature accuracy
Temperature resolution
Test Frequency
Measuring Distance
Number of relays
Type of ports
Working Temperature
Storage Temperature
Working Power Supply
Working humidity
Maximum length of each channel
Oversize (WxHxD)
Technical Data
WT-DTS-7000
16
-40~ +120°C
±1°C
±0.1°C
2s/Channel
0~80km
8
USB/RS232/RS485/RJ45
-10°C~ +50°C
-20°C~ +60°C
220V AC
≤96% non-condensing
5km
432mm*175mm*455mm