Sensing Cable Installation
The optical fiber sensing cable is installed along the asset or area requiring protection, including tunnels, conveyors, cable routes, storage areas and equipment rooms.
LINEAR HEAT DETECTION
FIBER OPTIC DISTRIBUTED TEMPERATURE SENSINGDistributed Temperature Sensing for continuous temperature monitoring and alarm localization across long and complex assets.
REQUEST A QUOTE
CONTINUOUS HEAT DETECTION
Distributed Temperature Monitoring Along the Sensing Route
Fiber optic linear heat detection uses Distributed Temperature Sensing (DTS) to monitor temperature continuously along an optical fiber sensing cable.
A DTS interrogator sends laser pulses through the fiber and analyzes Raman backscatter to generate a distributed temperature profile along the installed sensing route. Configurable alarm criteria can identify abnormal thermal conditions and determine the relevant alarm position or alarm zone.
Unlike fixed-position heat detectors, DTS provides temperature information along the sensing cable rather than only at isolated detector locations. This makes it suitable for extended, electrically noisy or difficult-to-access infrastructure.
HOW THE SYSTEM WORKS
From Distributed Measurement to Alarm Localization
The sensing cable, DTS interrogator and alarm interfaces operate together as an application-specific monitoring system.
Distributed Temperature Measurement
The DTS interrogator measures temperature at defined positions along the fiber and generates a continuous temperature profile.
Alarm Evaluation and Localization
Temperature data is evaluated against configured alarm criteria. When a condition is met, the system identifies the relevant position or alarm zone.
ALARM CRITERIA
Configurable Detection Logic
Alarm thresholds and zone settings should be configured according to the normal operating conditions, credible thermal hazards and required response strategy of each monitored area. Localization performance depends on sensing range, spatial resolution, measurement settings, cable placement, thermal coupling and environmental conditions.
Explore the Distributed Temperature Sensing principle.
Explore DTS Technology
Learn how Raman backscatter and time-of-flight analysis produce spatially resolved temperature information.
WHY FIBER OPTIC DTS?
Designed for Long and Demanding Monitoring Routes
Continuous Linear Coverage
Distributed temperature measurement along the installed sensing cable rather than only at isolated detector positions.
Temperature Profiling
Measured temperature data, alarm position and historical temperature trends can be evaluated together.
Configurable Alarm Zones
Different thresholds and alarm criteria can be assigned to individual sections of the sensing route.
Passive Sensing Element
The sensing fiber requires no electrical circuit along the monitored route. Active system equipment remains powered.
EMI Immunity
Optical sensing is immune to electromagnetic interference around cables, transformers, switchgear and motors.
Application-Specific Cable Selection
Cable construction can be selected according to temperature, fire performance, moisture and mechanical requirements.
TYPICAL APPLICATIONS
One Sensing Principle, Application-Specific Design
Cable placement, alarm zoning and response logic must be adapted to the thermal risks of each application.
Tunnels and Underground Infrastructure
DTS can support linear heat detection, alarm localization and integration with tunnel management, ventilation, smoke extraction, suppression and emergency response systems.
Conveyors and Material Handling
Monitoring of selected conveyor sections where abnormal heating may be associated with bearings, rollers, friction, drive systems or material accumulation.
Electrical and Power Infrastructure
Cable trays, trenches, joints, terminations, busbars, switchgear, transformers, substations and UPS systems.
Battery Energy Storage Systems
Distributed thermal monitoring along battery racks, power interfaces, cable connections, HVAC routes and container zones.
Warehouses and Logistics
High-bay storage, conveyors, sorting systems, charging areas, cable routes, cold storage and concealed service spaces.
Data Centers and Telecommunications
DTS can be applied along cable routes, busways, power connections, UPS areas, battery rooms, cable vaults and remote equipment shelters.
The Battery Management System remains responsible for cell-level electrical monitoring and control. DTS provides an additional distributed temperature monitoring layer.
SYSTEM INTEGRATION
Integration with Fire and Operational Systems
A DTS-based system may interface with Fire Alarm Control Panels, Building Management Systems, SCADA, Distributed Control Systems, Tunnel Management Systems, ventilation, smoke extraction, suppression, CCTV and alarm-management platforms.
Detected events may support operator notification, visualization, equipment isolation, shutdown, ventilation control or other predefined responses.
Any automated action must be defined through the approved
cause-and-effect matrix and the wider safety or operational
control architecture.
Application-Specific Engineering
Effective design depends on sensing cable placement, thermal exposure, alarm criteria, zoning, cable construction, redundancy, controller location, power protection and commissioning.
The system should be engineered around the actual thermal hazard and required operational response, not around a standard installation diagram.
FOTAS APEX
Fiber Optic Linear Heat Detection with DTS
FOTAS APEX is a Distributed Temperature Sensing solution developed for fiber optic linear heat detection and fire detection applications.
Depending on the approved product configuration, available functions may include distributed temperature measurement, fixed-temperature and rate-of-rise alarms, configurable alarm zones, alarm localization, visualization, relay outputs and communication interfaces.
- Tunnels and underground infrastructure
- Conveyors and cable routes
- Warehouses and data centers
- Battery energy storage systems
- Substations and industrial facilities
Product specifications, performance values, localization capability and compliance statements must be confirmed using the latest approved FOTAS APEX datasheet and certification documentation.
ENGINEERING SUPPORT
Discuss Your Linear Heat Detection Application
Contact the FOTAS engineering team to evaluate sensing cable routing, monitoring zones, system integration and project requirements.