Leak KNX 2.0

Leakage Sensor for Water/Pipe Break Detection


The Leakage sensor Leak KNX 2.0 includes an evaluation unit and a probe. If there is water between the electrodes of the probe, the evaluation unit produces an acoustic alarm. Additionally, the alarm signal is sent to the KNX bus.

Even if no probe is connected or the cable is defective, the alarm can be sounded and signalled on the bus.

Leak KNX 2.0
  • Detection of water on the probe
  • Acoustic alarm signal by the evaluation unit during a water alarm (sustained beeping tone). Short beeping during the follow-up time (1 minute after the end of the alarm).
  • Alarm signal sent to the KNX bus with a text message
  • Detection whether probe is connected and the probe cable is functional
  • Acoustic alarm signal on the evaluation unit when the probe is not connected or when the probe cable is broken (long beeps)
  • 4 AND and 4 OR logic gates with each 4 inputs. Every switching incident as well as 16 logic inputs in the form of communication objects, may be used as inputs for the logic gates. The output of each gate may optionally be configured as 1 bit or 2 x 8 bits
  • Configuration is made using the KNX software ETS 5.

Analysis unit:

Casing Plastic
Colour Grey
Installation Surface mounted
Degree of protection IP 20
Dimensions approx. 105 x 105 x 65 (W × H × D, mm),
Weight approx. 180 g
Ambient temperature Operation -20…+70 °C, storage -55…+90°C.
Ambient humidity max. 95 % RH, avoid condensation
Auxiliary voltage20...32 V DC A suitable power pack can be purchased from Elsner Elektronik.
Power on the bus 10 mA
Data output KNX +/- Bus connector terminal
Communication objects 55
Current Consumption at 24 V DC ±10%
no alarm: max. 15 mA
alarm: max. 30 mA
Probe input 1 x electrode probe, plug-in BNC terminal


Material Casing / electrodes: stainless steel A2
Installation for placing on the floor
Degree of protection IP 68
Electrode chemical resistanceWater
Dimensions Diameter: approx. 77 mm
Cable length approx. 140 mm (plus cable grip and plugs)
Weight approx. 200 g