Success Story: Proactive Water Infrastructure Protection with LoRaWAN Leak Detection

In a newly completed Grade-A commercial landmark in Hong Kong’s CBD, smart infrastructure was embedded from the earliest construction phase. One critical risk area identified during development was concealed water leakage within built-in toilet assemblies. Because water rope sensors would be installed inside finished walls and under permanent fixtures, post-construction access for inspection would be extremely limited.

To mitigate this risk, the construction consultant has selected SENSO8 LRS20310-W2xx LoRaWAN water rope sensor and installed over 300 units across more than 50 toilet spaces during the construction stage. Each sensor was paired with a water rope leak detection cable, creating a distributed sensing network embedded directly within concealed wet areas.

Eliminating the Risk of Missed Alerts

A key engineering requirement was ensuring that the system would remain reliable even if the sensing cable were damaged after deployment. Conventional rope-based leak detection systems can fail silently: if the cable is cut, deteriorated, or disconnected, the system may be unable to detect water — resulting in a missed alert.

Our solution integrates a cable break detection mechanism that continuously monitors the electrical integrity of the water rope. If the sensing cable is broken at any point after installation, the system immediately generates a fault alert. This prevents false assumptions of protection and ensures maintenance teams are notified before an undetected leak event can occur.

This capability was particularly important because the water ropes were permanently concealed within building finishes. Manual inspection would not be feasible without destructive access. The built-in cable integrity monitoring therefore serves as a continuous health check of the sensing infrastructure itself.

Wireless Resilience in Complex Interiors

Leveraging LoRaWAN connectivity, the sensors transmitted real-time status — including leak detection and cable health conditions — across multiple floors without requiring additional wired infrastructure. The long-range, low-power architecture enabled efficient deployment during construction and seamless integration into the building’s operational systems at handover.

Project Impact

• 300+ sensors deployed

• Coverage across 50+ toilets

• Real-time leak detection and cable integrity monitoring

• Reduced latent defect risk before building completion

• Long-term operational assurance for facilities management

  
  

By embedding intelligent leak detection with self-monitoring capability during construction, the project team established a higher standard of risk management for concealed wet areas. The deployment demonstrates how smart IoT infrastructure can not only detect water intrusion but also ensure the sensing network itself remains continuously operational — eliminating the possibility of missed alerts due to post-installation cable damage.