Vietnam High Temperature Measurement Optical Cable Model

Fiber optic temperature measurement in Vietnam uses distributed temperature sensing (DTS) and fluorescent fiber optic systems, capable of high-precision, real-time monitoring for industrial and power applications. Distributed Temperature Sensing (DTS) SystemsDTS systems use the optical fiber itself as the sensing element, measuring temperature along the entire cable length. A laser pulse is sent through the fiber, and Raman scattering generates Stokes and anti-Stokes signals, whose intensity ratio determines the local temperature.

The backscatter timing allows precise location mapping of temperature along the fiber.

DT

S systems, such as AP Sensing solutions, provide continuous monitoring of underground or high-voltage cables, detect hotspots, and support Real-Time Thermal Rating (RTTR) and Dynamic Cable Rating (DCR) for operational optimization.

DT

S instruments are designed to operate reliably in temperatures from -10°C to 60°C and in safety-critical environments.

Fluorescent Fiber Optic Temperature Sensors

Fluorescent fiber optic sensors are point-type sensors that measure temperature at specific locations. In Vietnam, suppliers like fjinno provide systems covering 1 to 64 sensing channels, suitable for switchgear, transformers, textile plants, steel mills, and seafood processing facilities. These sensors are fully dielectric, EMI-immune, and rated ≥100 kV, making them ideal for high-voltage industrial applications.

They offer long service life (>25 years), zero calibration requirements, and continuous online monitoring, outperforming thermocouples, RTDs, or infrared thermography in harsh environments.

Optical Cable Construction for Temperature Sensing

A typical DTS optical fiber unit includes multi-mode fibers enclosed in a stainless steel tube, with interstitial jelly to protect the fibers. The sensing fiber is placed close to the cable core for accurate conductor temperature measurement. Some models allow additional fibers for optional sensing channels.

These designs enable dynamic rating systems that assess actual cable capacity, environmental conditions, and cable health in real time. Local Availability and Suppliers in Vietnamfjinno: Offers fluorescent fiber optic temperature sensors and DTS systems for industrial and high-voltage applications, with OEM/ODM support and regional distribution. Yokogawa DTSX1: Provides distributed temperature sensing for long-distance monitoring, fire detection, and preventative maintenance in industrial plants.

A

P Sensing: Supplies DTS and DAS solutions for underground and subsea power cables, with integrated software for asset visualization and condition assessment. Key AdvantagesHigh-resolution, continuous temperature monitoring over long distances. Real-time detection of hotspots and abnormal temperature rises.

Reduced maintenance costs and improved operational safety. Suitable for high-voltage, high-temperature, and harsh environmental conditions. Supports dynamic cable rating and predictive maintenance strategies.

For Vietnam projects, selecting between distributed DTS systems and fluorescent point-type sensors depends on whether continuous monitoring along the cable is required or if specific point measurements suffice. Both systems are widely used in power grids, industrial plants, and high-voltage equipment monitoring.