Waste water level monitoring

Wastewater level monitoring in sewage networks

Logging the changing waste water level in sewage networks

In the wastewater recovery system, the sewage network, wastewater flows through small pipes that will join together in large sewer pipes underground. In these pipes the wastewater is transported from one pump station to another towards the sewage treatment plant, often over large distances.

Wastewater level monitoring in sewage networks is undertaken  to provide flow information and level monitoring, especially to control pumps in lifting stations and service pits.

To reduce the cost of transporting wastewater from the user to the treatment plant, such pump stations / lifting stations are built to lift the wastewater to a higher level. By lifting it to a higher level, gravity can be used to enable a natural flow of wastewater towards the treatment plant.

Service pits often provide a flood overflow discharge point in case the sewer becomes overloaded with storm water. This occurs when sewers are combined with rain water drainage and when excessive rain or storm water overloads the network.

One of the key questions is how to size propperly the sewage network so that to avoild overflows. Overflows are problematic since in many countries the water and sewage network utility companies have to pay compensations to customers with damaged properties from the returned storm or sewage waters.

One of the solutions is to gater dynamic level data from the sewage network and to recalculate and replan it based on the SWMM model.

Another is to get early warning notifications and to push on the pumps so that the network does not get overun by the incomming storm water. 

So here comes the role of ThingsLog solution for Waste water level monitoring.

What does the solution provides? 

  • Sewer flood water alarms – instant notifications for several different levels of sewer water.
  • Sewer water level measurements – per minute recordings of the sewer water level.

How does the solution work?

Thingslog solution has been build on top of the existing level monitoring solution and consists of intelligent low power data loggers, submersible sensors and specially desiged antenas for manhole installation.

The logger is logging the level in the sewer every minute and is able to detect changes to it.

If the change is higher than preconfigured threshold the logger wakes up and transmits an immediate alarm.

ThingsLog waste water monitoring


As sewer flooding is a massive problem the solution provides reliable information by efficient wastewater level monitoring of the sewage network.

The information is used for logging the changing levels of the wastewater and to plot typical flow rates in the sewer.

Based on that information our partner Preventos is able to calculate and calibrate SWMM stromwater model and help in designing a more efficient sweage network.

This data will be used to forecast problems of capacity and to alarm when the sewage network overflows, so maintenance may be scheduled or plans for more capacity optimisation considered.

Additionally, wastewater will often flow through weirs and flumes where high-accuracy, the solution is used for wastewater level monitoring in sewage networks throughout the whole structure and give an accurate measurement of the flow at that point. Thereby the flow in the network is monitored to provide forecast data for the water treatment facilities.

Wastewater level monitoring in sewage networks is an important tool for any sewage engineer, as by knowing the sewage level the operating efficiency of the sewage system can be enhanced and automated warnings on when sewage infrastructure overloads can warn the engineer of pending problems.

Finally the solution is able to save huge amount of money to waste and storm water utilities from fines from insurance companies and many, many angry customers.

Who could benefit from it?

  • Water and waste water utilitiy operators
  • Municipalities
  • Anybody else that would like to monitor sewage


The solution has been proudly deveveloped in cooperation with our partner

Preventos has actively tested ThingsLog data loggers. They provide on top also an additional analytics layer for storm/waste water prediction and analysis.

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Interested in?

Sens us an inquiry or give us a call!

21 Frederik Jolio Cure Str., apt 19
1113 Sofia, Bulgaria

E: info@thingslog.com
P: (+359 2) 898 76 33 22