New Wireless Float Switch so Frugal in Operation that it will be Operating Beyond 2030!


A robust, cost effective and ultra-low power wireless Float Switch Transmitter (FST) for water and wastewater level switching applications that utilises the industry standard NAMUR DIN 19234 switching floats such as the Pepperal+Fuchs LFL1-BK.

The transmitter is available as standard to ATEX Category 3, Zone 2 and for operation on 434MHz and 869MHz WBFM in line with the essential requirements of the Radio Equipment Directive RED 2014/53/EU.

Operating at a transmit rate of once every 2.5 seconds, this sealed to life to beyond IP68 (fully encapsulated) the deign can achieve a battery life of over 10-years. Further with its transmit duty cycle of less than 0.4% the design is fully complaint with Article 3.2 of the RED and fits comfortably within ERC-Recommendation 70-03 for spectrum occupancy.

Utilising the RDNET™ ultra-lean radio protocol, the unit is fully compatible with the existing RDN1000™ booster, receivers, repeaters and Gateways and can be supplied to emulate the characteristics of the highly successful BDT or FDT sewer monitors.

The FST is idea substitute for BDTs in applications of high humidity, open rain or where and operational hysteresis is desirable required using a single device. The cable type is PVC as standard making the unit idea for Water and Wastewater applications.


Wireless Float Switch

The FST Transmitter Complete with LFL1 NAMUR Float Switch

Cable length is 5m as standard and can be suppled shorter if required.

The FST can be used in conjunction with the Sentinel or Gateways receivers and data can be ported via Data Concentrators over TETRA, LAN or even Satellite Networks.

RDN Press Office 2018