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Distributed Temperature Sensing (DTS)

High Frequency Sensing & High Spatial Resolution DTS systems (2023 product line)

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
  • Oil & Gas Pipelines and Wells
  • Conveyor Belts
  • Power Plants
  • Tunnels

Specifications Overview

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 520DTS 540DTS 560
Temperature measurement range-65 to +300 °C
(-85 to +570 °F)
Spatial resolution4 m
(13 ft)
1 m
(3 ft)
0.5 m
(1.5 ft)
Temperature accuracy+/- 1°C
(+/- 2°F)
Measurement time, secondsfrom 10
Sensing lengthUp to 16 km (10 mi)
Wavelength, nm/fiber type1550/MMF, 50/125
Operating conditions+5 to +50 °C
(+40 to +120 °F)
Number of active channels1 to 12
Device dimensions480*425*130 mm
(18.9*16.7*5.1 in)
Weight10 kg (22 lbs)
Power supply110 / 220 or 19-30 V
Communication interfacesEthernet
For oil & gas applications Optromix can offer DTS 560 with Dual Lasers. Under harsh conditions of operation in a well, the DTS 560 Dual Laser is resistant to various harmful factors:
  • 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/cableUp to 62 miUp to 100 km
Spatial resolution980 feet300 m
Temperature accuracy9°F5°C
Measurement time, secondsfrom 10
Temperature measurement range-40 to +250°F-40 to +120°C
Wavelength, nm/fiber type1550/SMF, 9/125
Operating conditions-15 to +130°F-10 to +55°C
Number of active channels1 to 12

DTS HF Series (Distributed Temperature High Frequency Sensing (DTS) systems)

DTS HF is designed to measure the fast temperature processes with 15 Hz frequency. DTS HF standard fiber line is 100 meters with the extension possibility up to 1 km with 0,5 meter spatial resolution.
DTS HF allows obtaining measuring data by an Ethernet interface using a binary data stream and control measurements by the SPCI protocol. The provided software can also be customized by the request.
For high temperature measurement in the range of 300-400 C, DTS HF supplied with the carbon polyimide pure silica core fibers or its equivalent.

Temperature measurement range-65 to +300 °C
(-85 to +570 °F)
Spatial resolution4 m
(13 ft)
1 m
(3 ft)
0.5 m
(1.5 ft)
Measurement time, seconds0.06(6) second, or 15 Hz
Sensing length100 m (328 ft) (Can be increased 1 km)
Wavelength, nm/fiber type1550/MMF, 50/125, 62,5/125
Operating conditions+5 to +50 °C
(+40 to +120 °F)
Number of active channels1
Device dimensions480*425*130 mm
(18.9*16.7*5.1 in)
Weight10 kg (22 lbs)
Power supply110 / 220 or 19-30 V
Communication interfacesEthernet

DTS HSR Series (High Spatial Resolution Distributed Temperature Sensing (DTS) system)

DTS HSR effectively provides real-time continuous temperature measurement along the entire length of the fiber optic cable.
This technology allows obtaining the 10 cm spatial resolution intended to be widely used in detecting various leaks and controlling technological processes.
DTS HSR acquires thermograms each 10 second transferred using Ethernet connection. Optionally up to 1 second measurement frequency is available.
Temperature measurement range-65 to +300 °C
(-85 to +570 °F)
Spatial resolution0.1 m

(0.328 ft)
Measurement time, seconds10
Sensing length250m (820 ft) (Can be increased)
Wavelength, nm/fiber type1550/ MMF 50/125, 62,5/125
Operating conditions+5 to +50 °C
(+40 to +120 °F)
Number of active channels1 to 8
Device dimensions480*425*130 mm
(18.9*16.7*5.1 in)
Weight10 kg (22 lbs)
Power supply110 / 220 or 19-30 V
Communication interfacesEthernet

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.