Distributed Temperature Sensing (DTS)
Specifications Overview
Optromix Distributed Temperature Sensing (DTS) system allows the detection of absolute temperature and temperature changes at the distance of up to 30km along a fiber optic cable. It can provide temperature monitoring of the following facilities: Transmission & Distribution Power Lines, Tunnels, Oil & Gas Pipelines and Wells, Conveyor Belts, Power Plants.
DTS 500 Series
Optromix DTS 500 Series remotely measures temperature along a fiber optic cable of up to 16 km (10 miles) long in real-time.
This fiber optic cable is not subject to electromagnetic interference, chemical effects and the impact of corrosion. It does not require any extra power supply along the entire length.
| DTS 520 | DTS 540 | DTS 560 | |
| Temperature measurement range | -65 to +300 °C (-85 to +570 °F) | ||
| Spatial resolution | 4 m (13 ft) | 1 m (3 ft) | 0.5 m (1.5 ft) |
| Temperature accuracy | +/- 1°C (+/- 2°F) | ||
| Measurement time, seconds | from 10 | ||
| Sensing length | Up to 16 km (10 mi) | ||
| Wavelength, nm/fiber type | 1550/MMF, 50/125 | ||
| Operating conditions | +5 to +50 °C (+40 to +120 °F) | ||
| Number of active channels | 1 to 12 | ||
| Device dimensions | 480*425*130 mm (18.9*16.7*5.1 in) | ||
| Weight | 10 kg (22 lbs) | ||
| Power supply | 110 / 220 or 19-30 V | ||
| Communication interfaces | Ethernet | ||
- Control and recording of losses in the fiber - the device demonstrates the absence of temperature variation during pressure tests when a mechanical effect on the fiber and temperature display is performed taking into account irregular losses.
- The remoteness of the anti-Stokes component from the absorption peak shows a horizontal temperature profile in the horizontal section of the well.
DTS 1000 Series
Optromix DTS 1000 Series remotely measures temperature along a fiber optic cable of up to 100 km (62 miles) long in real-time.
This fiber optic cable is not subject to electromagnetic interference, chemical effects and the impact of corrosion. It does not require any extra power supply along the entire length.
| Sensing element length/cable | Up to 62 mi | Up to 100 km |
| Spatial resolution | 980 feet | 300 m |
| Temperature accuracy | 9°F | 5°C |
| Measurement time, seconds | from 10 | |
| Temperature measurement range | -40 to +250°F | -40 to +120°C |
| Wavelength, nm/fiber type | 1550/SMF, 9/125 | |
| Operating conditions | -15 to +130°F | -10 to +55°C |
| Number of active channels | 1 to 12 | |
DTS Applications
Distributed temperature sensing can be deployed successfully in multiple industrial segments:
- Temperature monitoring of Transmission & Distribution power lines
- Oil & gas wells and reservoirs monitoring
- Leakage detection in oil and water pipelines
- Fire detection in tunnels, industrial conveyor belts and special hazard buildings
- Temperature monitoring and control in mines
- Research & Development
DTS Meaning & Principle
Distributed temperature sensing (DTS) systems are optoelectronic devices which measure temperatures by means of optical fibers functioning as linear sensors. Temperatures are recorded along the optical sensor cable, thus not at points, but as a continuous profile. A high accuracy of temperature determination is accomplished over great distances. Optromix DTS systems can locate the temperature down to a spatial resolution of 0.5 m with accuracy to within ±1°C at a resolution of 0.1°C.
Laser pulse is transmitted through the fiber optic cable from one side. As soon as the pulse transposes the fiber, it causes backward scattering depending on local temperature. Based on the intensity of backward scattering we can perform temperature measurement. In order to determine the distance we calculate the time required for backward scattering to come back. Therefore, the optical fiber cable operates like the sensor. It means that the fiber optic installation and maintenance are not complicated.