Andel FloodAlert Bollard
Andel FloodAlert Bollard is a cost-effective, real-time, local flood warning and water level monitoring system.
Winner of Insider Media Made In Yorkshire Manufacturing Innovation Award 2025
The Andel FloodAlert Bollard, part of Andel’s FloodAlert range, is a real-time, low-carbon impact flood warning and water level monitoring solution. Designed for flexible installation in-stream, above or below ground, it delivers 24/7 local monitoring. When water reaches pre-set, site-specific alert levels, the system instantly sends notifications via email and SMS to designated users.
Resilient and environmentally friendly
Bollards are constructed from 100% post-consumer recycled plastic waste which would otherwise go to landfill. Andel FloodAlert Bollard turns the longevity of plastic into an environmentally-friendly, cost-effective and robust solution which is vandal-proof and resistant to weather, UV, chemicals, temperature and moisture.
Radar LoRaWAN® water level sensor
Each bollard is equipped with a robust, waterproof radar LoRaWAN® water level sensor unit. The sensor unit is housed between a recess in the bollard stem and cap, providing continuous and accurate level data, referenced from the radar reflector housed in the base of the bollard stem.
Radar sensor data is wirelessly captured, stored and displayed on the cloud-based Andel FloodAlert Portal, accessible from any internet-enabled device, providing 24/7 real-time and historic water level data.
Bollards are strategically located to provide maximum warning to users so that when a pre-set threshold is breached, SMS and email flood notifications are sent for timely action to be taken to protect people and properties.
The FloodAlert Portal can connect to an unlimited number of sensor units and viewers with five users as standard.
Andel FloodAlert Bollard radar water level sensor is CE Approved and RoHS Compliant.
Two installation options
As rising water enters the bollard through rows of holes, the system sends alert notifications if the water level breaches each of the three pre-set alarm levels.
Wall mounted for waterways
Bollards are securely fastened to existing permanent structures with three 5-inch pipe clips, the bollard hanging slightly above the river bed to prevent blockages.
Rising water freely enters the bollard through a series of holes and on top of the radar reflector where the sensor monitors and records the water level. Any silt or debris naturally falls out of the open base.
Buried for monitoring rising ground and surface water flooding
Bollards are buried to a depth of 500mm in porous drainage gravel and secured with concrete in such a way that water can still freely enter and drain. The bollard stands approximately one metre above ground level.
Diagram: Alert levels are calibrated and pre-set for each individual installation, alert levels indicated are examples only.
