Temperature profile
Continuous temperature values along the installed sensing route.
Solution / Fiber Optic Temperature & Fire
See temperature and fire risk along the entire route.
HERTZINNO distributed temperature sensing turns passive optical fiber into a continuous temperature-sensing line for power cables, tunnels, data centers, energy storage, pipelines and industrial routes.
Continuous temperature profile, hotspot localization and project-specific alarm logic.
Continuous thermal visibility
One sensing fiber. Thousands of located temperature points.
Point sensors only measure selected locations. Distributed temperature sensing measures along the full installed fiber, helping operators identify abnormal heating between conventional sensor points and map each temperature value to a physical distance.
DTS measures temperature. DAS measures vibration and acoustic disturbance. The technologies can share an infrastructure strategy, but they should not be treated as interchangeable sensors.
Hotspot location
Distance-based localization of abnormal heating and thermal events.
Trend & rate of change
Historical and real-time temperature behavior for alarm and maintenance review.
Zone alarm logic
Project-defined thresholds and alarm zones for different assets and operating areas.
01 / Power
Power Cables & Substations
Find cable-route hotspots before they become equipment failures.
Cable joints, congested trenches, underground routes and substation cable exits can develop localized heating that is difficult to cover with isolated point sensors. DTS provides a continuous temperature profile and precise route position for investigation.
Typical monitoring priorities- Underground and transmission cable routes
- Cable joints, terminations and congested trays
- Substation cable exits and technical rooms
- Load-related heating and thermal trend review
02 / Corridors
Tunnels & Utility Corridors
Extend early fire warning beyond isolated detector locations.
Tunnels and utility corridors can extend for kilometers and contain cables, equipment rooms and restricted-access areas. Passive sensing fiber supports continuous temperature visibility, hotspot localization and zone-based alarm logic along the route.
Typical monitoring priorities- Tunnel and utility-corridor temperature rise
- Cable trays and technical service routes
- Fire-risk zones and restricted underground spaces
- Located alarms for faster field response
03 / Critical Loads
Data Centers & BESS
Monitor the cable and power routes behind uptime and energy availability.
Data centers and battery energy storage sites contain dense cable routes, electrical rooms and distributed thermal risks. DTS adds route-level temperature visibility around power infrastructure and complements—not replaces—BMS, electrical protection, fire detection and suppression systems.
Typical monitoring priorities- Power cable and busduct-adjacent routes
- Battery-room and container cable infrastructure
- Critical power distribution and technical corridors
- Thermal trend and alarm-zone management
04 / Long Routes
Pipelines & Industrial Routes
Track thermal anomalies along assets that cannot be covered point by point.
Pipelines, tank farms and long industrial routes may produce localized thermal changes around process events, insulation problems or leak-related conditions. DTS can provide distributed temperature evidence where the physical event creates a measurable thermal signature; project validation remains essential.
Typical monitoring priorities- Pipeline and transfer-route thermal anomalies
- Tank-farm and terminal cable routes
- Long industrial heating or cooling lines
- Combined DTS and DAS route architectures
How DTS works
Convert Raman backscatter into a located temperature profile.
HZ-DTS sends laser pulses into the sensing fiber, analyzes temperature-sensitive Raman backscatter and uses optical return time to map each result to a route position.
Laser pulse
The analyzer launches short optical pulses into the installed sensing fiber.
Raman scattering
Stokes and temperature-sensitive Anti-Stokes signals return from points along the fiber.
Temperature calculation
The signal relationship is converted into a temperature value for each sensing position.
OTDR mapping
Optical return time maps the temperature event to a distance along the monitored route.
DTS and DAS
Choose the fiber technology by the physical signal.
DTS and DAS both use optical fiber, but they answer different operational questions. Many long-distance projects benefit from both.
Technology
Primary signal
Typical monitoring target
DTS
Temperature and thermal change
Hotspots, cable heating and fire-risk routesUsed where the target event creates a measurable temperature signature.
DAS
Vibration and acoustic disturbance
Digging, vehicles, footsteps and route eventsUsed where the target event creates mechanical or acoustic energy.
DTS + DAS
Thermal plus vibration evidence
Multi-signal long-route monitoringCombines complementary evidence when one signal is not sufficient.
Product fit
Configure HZ-DTS by route count and project range.
Final range, channel count, fiber type, response time and alarm configuration should be confirmed against the actual route and operating environment.
HZ-DTS-1004
4-channel distributed temperature sensing
For projects requiring multiple monitored routes with continuous temperature, hotspot and location data.
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HZ-DTS-1008
8-channel distributed temperature sensing
For larger cable, tunnel, storage or industrial projects requiring additional route capacity.
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HZ-DTS-1016
16-channel distributed temperature sensing
For complex sites with many independent zones or routes connected to one monitoring architecture.
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HZ-iDAS Series
Distributed acoustic sensing complement
Add vibration, intrusion and route-disturbance awareness when the project requires more than temperature data.
Compare fiber systems →Frequently asked questions
Planning a distributed temperature sensing project.
DTS performance depends on the analyzer configuration, sensing cable, route installation, alarm logic and the thermal behavior of the monitored asset.
What is the difference between DTS and point temperature sensors?
Point sensors measure selected locations. DTS uses the installed optical fiber as a continuous sensing line, providing temperature values and distance information along the monitored route.
Can DTS be used for early fire warning?
Yes. DTS can support continuous temperature, hotspot and rate-of-change monitoring along tunnels, cable routes and other fire-risk areas. Final alarm logic and integration should be designed for the project and applicable local requirements.
Does DTS replace a certified fire alarm or suppression system?
No. DTS adds distributed thermal sensing and located alarm information. It should be integrated with the site's overall fire detection, protection and response design rather than presented as a universal replacement.
Can existing optical fiber be used?
It depends on fiber type, route condition, installation method, connector quality and whether the fiber is suitable and available for sensing. A project survey and optical assessment are required.
When should DTS and DAS be combined?
Combine them when the project needs both thermal evidence and vibration or acoustic event awareness—for example, temperature anomalies plus digging, vehicle or intrusion events along a long route.
What information is needed to design the system?
Provide the route length, number of zones or channels, asset type, temperature range, response requirement, cable installation conditions, communication interface, alarm workflow and existing control or fire platform.
Plan the sensing route
Tell us the asset, route length, temperature range and alarm objective.
Share the cable or infrastructure type, total sensing distance, number of routes, expected temperature range, installation environment, response requirement and platform interface. HERTZINNO can help define the DTS architecture and sensing-cable layout.