Flood and River Level Monitoring

Flood & River Level Monitoring

River and Flood Warning Telemetry – Licenced Radio Telemetry or LEO Satellite based without SIM Cards or Cellular Coverage. Proven in service by the EA, Utilities and across the Industrial Sectors.

Our flood warning systems have the ability to detect and report all five sources of flooding and operate over an exclusive secure radio telemetry band operating under an exclusive Ofcom licence.

  • Surface Water Flooding:
  • River Flooding:
  • Groundwater Flooding:
  • Sewer Flooding/ Sewer Surcharges:
  • Burst Pipe Flooding:

Our Resilient Communications:

How many times have you suffered from broken calls, had to move to find a better signal, found no signal at all or found the cellular networks totally congested? We would guess many times, and because flood detectors/level sensors to be effective have to be located up stream in remote areas, also cannot move we have two unique solutions. The first option is our decided Ofcom licenced radio channel and the second is over the LEO Satellite networks.

Either system  can be constructed to operate from a single or multiple locations, with flood sensors distributed over areas measuring many square km/miles.

Dual Redundant Sensing, 16-Bit Analogue EA Approved

Our Analogue 4-20mA systems have been tried and tested by bodies such as the EA, where two sensors are used in parallel to permit the cross correlation of data to ensure that level sensors/probes are functioning correctly without having to visit site. Simply the level data should track within a fraction of a percent, however if divergence is observed then a fault can be suspected in one of the sensors.

We offer one of the highest levels of resilience when it comes to communications from our flood sensors. Secure Ofcom Licenced radio and/or military grade LEO Satellite communications

In all cases we do not require SIM cards of connection to the cellular networks. Not only does this eliminates the reliability and growing risk obsolescence issues associated with the cellular networks but also permits systems to be installed in remote locations without issue.  Finally, our communications are totally immune from cyber attack as they do not use the Internet or IP data protocols.

The majority of our flood warning detectors are housed in discrete bollard housings permitting them to be installed  in a variety of strategic locations ranging from river banks through to the edge of public highways (cut away section of bollard housed flood alarm shown below). The units can also be supplied in our smart pole mounted  boxes with integrated solar panel that can be secured to railings and on poles sunk into the ground alongside riverbanks. The in-sewer / drain flood alarms are mounted under manhole covers and can report back the presence of a storm surcharge which could lead to a breach of flood defences via our solar powered repeater/booster stations.

The flood alarms are 100% battery powered and the internal electronics are fully encapsulated to exceed the IP68 standard in order to withstand prolonged submersion during the flood. The system operates using our proven BDT sensing technology that has no moving parts eliminating the risk of sticking float switches a common problem that is often caused by insect, leaves and dirt infiltration. BDT technology is also generally outperforms conductivity type systems as it is immune to triggering by wet leaves. Battery life is typically 10-years and unlike GSM/SMS based systems which are both power hungry and expensive to operate, our power efficient design and lean radio protocols permits each unit to automatically send a uniquely coded health message every 5 or 15 minutes (version dependant) which the receiver station automatically constantly monitors to confirm the system is operational.

Flood Alarm housed in bollard

Flood Alarm Sensor and Transmitter housed in a Roadside Bollard.

At the receiving end we offer a number of options. The first is our “Utility Gateway Receiver” this unit permits the flood alarm system to be interfaced with existing telemetry outstations, building management systems (BMS), etc. by a series of volt free contacts. Utility Gateways can also simultaneously be configured to deliver analogue levels (0-2V) or 4-20mA or report sewer blockages and CSO spills from other Radio Data Networks devices. Utility gateways can serve anything from between a single Flood Alarm to up to 64 over an area of many square Km. The second option is the Utility Hub, this is a small receiver that is ideal for use in factories and small communities but is restricted to serve a maximum of 5 flood alarms. Either solution units can be used with an external PSTN telephone auto-dialler offering un-rivalled performance when compared to SMS/GSM “push and pray” based SMS / Text units.

We offer the choice of two operating distances. The first is 300m to 1km (topology dependant) and thanks to our special exclusive Ofcom licensed radio band (subject to a small annual fixed charge) we are also able to offer systems capable of operation over distances from 500m to 10km radius. Range can also be enhanced by using a pole mounted “Booster” system where a short range Flood Alarm is combined with one of our Booster units mounted up high to enhance signal propagation.

The picture to the left shows the complete flood alarm in a stone effect bollard housing . Visible are the ground anchors which are generally set into the ground and concreted in place to secure the unit thus preventing it from being washed away.

Subject to a minimum order quantity the flood alarms can be ordered in a variety of coloured bollards. Please call for details.

Wide Area Wireless Flood Alarm Key Features:

  • Solid state flood detection technology without moving parts
  • Long Battery Life up to 10-years (version dependant)
  • Electronics sealed to > IP68
  • Discrete compact bollard housing available in a variety of colours and finishes
  • Unlimited number of flood detection points / locations
  • Operating radius 300m to 10Km version dependant for Licenced Radio or Unlimited for LEO Satellite
  • Fully compatible with BDT Blocked Sewer and CSO Spill detection system which can detect flood waters attempting to bypass flood defences through the drains and sewers.
  • Unique secure data protocol with 32-bit (4-billion) address and 16-bit error check sum.
  • Utility Gateway provides simple interface to existing telemetry and alarm systems (no software required)
  • Optional Ofcom protected radio spectrum (used for non-satellite systems)
  • Bollard measures 600mm tall, 280mm diameter up to 300mm (max) diameter.
  • Mounting stake galvanised steel
  • Ability to interface directly to wide area paging systems or PSTN voice dialling systems
  • Able to interface with GSM & SMS reporting system (not our preferred option)
  • Coverage area extendable by using repeaters to cover entire cities.
  • CE, R&TTE, RE-D and EN-300-220-1 Compliant Design

Unique: Construct Mixed Flood Alarm, Storm Drain and Sewer Surcharge Alarms on One Platform

SMS Text Flood Warnings

Flood Warnings delivered by SMS Text to communities

Many communities and businesses suffer flooding through the sewers and storm-drains backing up into their properties. To cater for this our flood alarm systems can be also equipped with our BDT blocked sewer detectors that can simultaneously report both surface and sewer flooding.

Please speak to our sales department for further details.

What Else Can our Flood Alarms Do?

  • Switch and control pumps
  • Activate flow diversion valves
  • Activate and drive sirens
  • Activate GSM/SMS messages
  • Activate wide area or on-site paging systems
  • Activate existing alarm systems
  • Interface with telephone dial systems
  • Interface with Scanning Telemetry
  • Interface with rain gauges to permit early warnings

Sales & orders

Please call your local distributor for prices on products, systems and solutions. Spares and accessories may also be purchased through our online web portal