Tunnel and highway monitoring
Planck distributed temperature sensing (DTS) measures temperature along an optical sensing cable. In road tunnels, the temperature profile helps operators locate unusual heating and follow its development by tunnel chainage.
Tunnel heat monitoring
A sensing cable near the tunnel ceiling records temperature changes as heat reaches it. Cable position, ventilation and obstructions affect the response. Monitoring zones relate measurements to tunnel sections and access points.
Cable trays and service corridors
Power cables and other services need sensing routes positioned near the assets. Suitable thermal contact supports temperature trending and hot-spot investigation. Local hot-spot monitoring requires sensing cable close to the relevant cable-tray assets.
Installation and commissioning
Map the sensing route to tunnel chainage, locate equipment and agree the measurement settings. Commissioning checks location mapping, temperature response, interfaces and instrument or cable faults. Fire-related use requires a complete system design and validation against the project's detection and certification requirements.
Highway traffic monitoring
Distributed acoustic sensing (DAS) measures traffic-induced vibration along fiber installed beside highways or through tunnels. Vehicle movement and traffic-flow estimates require analytics calibrated and validated for the route.
Planck DTS equipment
Planck DTS offers four optically switched channels with E2000 connectors. Interfaces include REST API, WebSocket, RS485 Modbus, Ethernet and alarm relays.
View DTS equipment| Variant | Max. range | Spatial resolution |
|---|---|---|
| 5 km multimode | 5 km | 0.3 m |
| 10 km multimode | 10 km | 1 m |
| 15 km multimode | 15 km | 1 m |
| 25 km single-mode | 25 km | 5 m |
Select range and spatial resolution together with measurement settings. Confirm performance in the model datasheet.
Discuss your project
Send the tunnel drawings, service routes and monitoring requirements to discuss the sensing layout.