Leakage Sensor MDT SCN-LSEN1.01 KNX — water leak detector, KNX interface

MDT SCN-LSEN1.01 KNX is a water leak detector with a KNX interface, designed to detect the presence of water and report events on a KNX building automation bus. The device monitors contact points or connected probes and sends status messages to the KNX system so that alarms, notifications, or control actions can be initiated automatically. Intended for both residential and commercial installations, the sensor supports early detection of leaks to help limit water damage and enable coordinated responses such as valve shut-off or activation of local alerting devices.

Advantages

The MDT leakage sensor provides real-time leak detection integrated directly into KNX networks, enabling immediate notification and automated responses through standard KNX telegrams. Its compact design allows unobtrusive installation near vulnerable equipment, under sinks, or in technical rooms. By reporting precise alarm states to the building control system, the device simplifies centralised monitoring, supports preventive maintenance and reduces the need for manual inspections.

Suitable for

• Basements and boiler rooms
• Under sinks and behind dishwashers or washing machines
• Server rooms and telecom cabinets
• Bathrooms and utility rooms
• Commercial facilities with central KNX automation

Key specifications

• Detection type: contact or probe-based water presence detection
• Interface: KNX bus communication for event reporting and status monitoring
• Power: supplied via KNX bus (no separate power supply required)
• Output: KNX telegrams for alarm, fault and status signals
• Installation: compact form factor for wall- or surface-mount near potential leak sources
• Environmental: suitable for indoor use in typical residential and commercial humidity ranges

How to use

Install the MDT leakage sensor at locations where water accumulation is likely, such as beneath appliances, near drain points or along service lines. Connect the device to the KNX bus following standard KNX wiring practices and configure the communication objects in the KNX engineering tool to match required alarm and status functions. Place probes or contact elements so they reliably detect water at the lowest point of the protected area. Test the sensor and KNX integration after installation by simulating a leak and confirming that the appropriate KNX telegrams and responses (alarms, valve closures, notifications) are generated.

Usage recommendations

Position probes where water will first appear and avoid mounting the sensor in locations exposed to regular splashing or condensation to reduce false alarms. Include clear configuration of alarm priorities in the KNX project and, where possible, link the sensor to automatic shut-off valves or central monitoring to ensure timely response. Perform periodic functional checks and visual inspections of probe wiring to maintain reliable operation.