DTS-BLY-5S(SM-20km) · Single-mode 20 km DTS
20 km single-mode temperature sensing for longer linear assets.
DTS-BLY-5S(SM-20km) 20km SM Distributed Temperature Sensing (DTS) System
DTS-BLY-5S(SM-20km)
20km SM Distributed Temperature Sensing (DTS) System

Measures continuous temperature profiles and abnormal-temperature locations along the fiber. Select range, fiber type, channels and sensing cable for the specified model.
Typical applications
For projects using single-mode sensing fiber, including submarine cables, data centers, storage tanks and pipelines.
Spatial resolution, sampling interval and location accuracy are distinct quantities. Temperature accuracy depends on fiber length, acquisition time, temperature range and cable configuration; optimum values are not necessarily simultaneous.
Spatial resolution uses the 10%–90% step-response criterion and the ± spatial-extent notation used in this datasheet. Location accuracy is specified separately. Compare specifications using the same definitions and test conditions.
Technical specifications
| Parameter | Specification |
|---|---|
| Fiber Type | Single Mode Fiber |
| Center Wavelength | 1550 nm |
| Measurement Range | 20 km |
| Spatial resolution | ±1 m |
| Location Accuracy | ±1 m |
| Measurement Time | ≤10 s/km(software-adjustable) / software-adjustable |
| Temperature Measurement Range | -40°C to 450°C (depending on cable type) Depending on cable type |
| Temperature Accuracy | ±2.5°C@20km; |
| Temperature Resolution | 0.01°C |
| Measurement Channels | Up to 16 channels |
| Optical Connector | FC/APC |
| Power Supply | DC 24 V; average power consumption ≤8 W |
| Operating Temperature | -10°C to 60°C |
| Storage Temperature | -20°C to 70°C |
| Communication Interfaces | 1 × RS-232, 1 × RJ45 Ethernet, 2 × RS-485, 8 relay outputs |
| Dimensions (W × D × H) | 482.6 × 442.7 × 88.8 mm (2U rack-mount) |
| Weight | 8 kg |
Applications and further reading
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