HW group WLD-ECHO
Compact water leak detector for external sensing cables








- LED indicators for OK / Flood / Disconnected
- Audible alarm
- 2× WLD zone input for sensing cables
- Digital Output relay
- External power supply
- Battery operation
WLD-ECHO is a compact water leak detector supporting two external sensing cable zones. It detects even a few drops of conductive liquid any- where along the sensing cable (up to 185 m) and provides early warning via a built-in audible alarm and relay output.
Powered by either 2× AA batteries or an external power supply, WLD-ECHO offers flexible installation in data centers, server rooms, and other tech- nical facilities.
Fast detection requires no standing water level, ensuring reliable long- term monitoring. The device also signals sensing cable disconnection or damage. Zone 2 can be disabled when not in use.
With its dry-contact relay output, WLD-ECHO can be easily integrated into security or monitoring systems.
WLD liquid sensing (rope) cables provide continuous water leakage de- tection along their entire length. Water sensing cables cover larger areas and react much faster, even to just a few drops of water. However, water sensing cables require more careful installation.
Typical applications
- Liquid detection in buildings / technical sites
- Installation along walls and steps to protect rooms or entire floors
- Monitoring water leaks outside bathrooms in hotels
- Data centers - leak detection under raised floors and above suspended ceilings
- Server rooms / IT racks - early warning for leaks around cooling units and cable trays
- HVAC systems - monitoring leaks from A/C units, chillers, and condensation pipes
- Boiler rooms - detection of leaks from boilers, pumps, and valves
- Building basements - early detection of flooding or groundwater ingress
- Industrial facilities - monitoring around pipelines, tanks, and production lines
- Commercial buildings - installation along walls and floors to protect offices and common areas
- Hotels - monitoring bathrooms, corridors, and technical areas to prevent water damage
- Hospitals and labs - protection of sensitive areas with critical equipment

Specifications
| Interfaces | |
|---|---|
| WLD | 2 zone for external WLD-Sensing cable A/B |
| DO (Digital Outputs) | 1× DO latching relay (25 V / 0.5 A) |
| Features | |
| Alerts | Audio, Visual LED |
| Technical Specifications | |
| Power supply | 5-30 V DC (12 V DC nominal), typ. 20 mA, 2× AA batteries |
| Operating temperature | -10 °C to 60 °C (14 °F to 140 °F) |
| Storage temperature | -30 °C to 60 °C (-22 °F to 140 °F) |
| Dimensions | 76 × 35 × 144 mm (W × H × D) |
| Warranty | 24 months |
Ordering Information
| WLD-ECHO | WLD-ECHO (plain unit) |
| WLD-ECHO Set | 1x WLD-ECHO 1x WLD-Sensing cable B 2m 1x WLD-Connecting cable AB 2m 12V Wall plug adapter 2 pin INT 1x 2x AA batteries (primary cells) |
Accessories
| WLD-Cover Strip 5m | Protective cover strip for WLD-Sensing cable A/B |
| WLD-Poro Tape 5m | Adhesive tape with holes for mounting WLD-Sensing cable A/B. |
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