Monitoring unit with locating
  • Quick and precise localisation of the leakage location
  • Modbus RTU integration into the building surveillance
  • Can be combined with the sensor cable or point sensor
  • Monitoring lengths up to 500 m
  • Up to 50 point sensors
  • Available as factory pre-assembled wall box IP65


The monitoring unit RLAnet operating with the sensor cable SCR and/or the point sensor PS as well as the optical point sensor PSO/PSO+. The system detects minor liquid leakages fast and reliable. An optical and acoustic signal arises. Simultaneously the potential-free contact switches. This can be used for signaling to PLC or to a building control unit. The leakage is being localized exact by 1 meter and get visualized on the 4-digit display. Thus a leakage will be found by a service person quick and true. The max. monitoring length is 500 m. Up to 50 point sensors can be installed.

The service-software (for WINDOWS-PC) calls the system status via RS485 in real-time. The data is available in Modbus RTU protocol. Up to 250 Modbus addresses can be handled. The typical application parametrization will also be managed by using this service-software.

Technical Data

Protection class IP 20
Dimensions 70 mm x 86 mm x 53 mm (W x H x D)
Material Housing material: Thermoplastic
Measuring principle Conductive (conductive liquids > 30 μS/cm)
Accuracy: ±1 %
Installation Clip-on enclosure for mounting rail TS 35
Storage temperature -40 °C to +60 °C
Humidity 5 % to 95 % air humidity (non-condensating)
Display optical:
– Power LED red (relay de-energized)
– Leak LED green (relay energized)
– Service LED green (relay energized)
– Piezoelectric buzzer quit by pressing button on front panel
Memory Alarm-/Break storage, last 32 events
Voltage DC 12 V to 24 V ±10 %
Power 3 W
Connection Inputs:
– Sensor via 4-wire cable
– Sensor cable length: max. 500 m
– Point sensors: max. 50 pieces
– Sensitivity: adjustable
– Collective message alarmrelay, 1 floating change-over contact
– AC-12: 0.5 A, 125 V
– DC-13: 1 A, 24 V
– RS485, Modbus RTU, for process visualization and parametrization

Manuals/Operating Instructions/Guides

  • User manual RLA Net
  • Communication Protocol RLA Net

Data Sheets

Data sheet RLA Net