IoT sewerage water sensor & monitoring system

Sensor system to Monitor (waste) water infrastructure

The Smart Cities water sensor platform is an entire solution for obtaining relevant information about waste water and/or a complete sewerage network. The sensing platform can also be used for surface water measurement applications.

Accurate, real-time data

In order for municipalities and water authorities to proactively manage their networks they need data; they need real-time data; and they need the correct real-time data.

Predictive analytics

In addition, they need the tools and technology to correctly analyze, synthesize and process this data to make adjustments capacity utilization as well as and to optimize maintenance and servicing. Predictive analytics.

2M develops, together with a number of partners a smart system for the measurement and analysis of various wastewater parameters. The aim is to create a low cost system to cleverly control wastewater and the infrastructure of the sewerage system. 


Smart cities waste water sensor platform components

Sensor measurement unit

Waterproof sensors that measure a variety of physical and chemical (waste) water parameters.

Control & communication unit

Waterproof data collection, processing and raw data storage (sd-card) unit. The control unit is equipped with a number of wired and/or wireless connectivity standards to communicate measurement data to the Cloud. The control unit also contains power banks for standalone operation in case no external power is available.

Cloud based storage and visualization (optional)

Cloud based storage, AI based data processing and visualiza- tions of a complete infrastructure or network.

Product Brochure WS100 – waste water sensor

Low cost IoT sewerage water sensor

An easy to install sensor is placed within the sewerage pipe that communicates to the outside world using LORA, RS485, BLE or other technology without damaging the pipe. The whole system can be battery powered or solar powered. When such sensors are placed at various key locations in the network and centrally analyzed powerful metrics can be extracted that gives insights not possible today.

Smart water sensor

Products and Services


Sensor Ring Platform

  • Patented flow-sensor
  • Embedded control
  • Analytics software

Addressable market: all municipal water authorities both waste- and clean water networks)

Business Cases: Optimized maintenance -know what and where to invest in maintenance.  Lower pipe and pump failure rates. Identify illegal waste and properly tax their sources.


Predictive Analytics Platform

  • Input: Multi-dimensional input data sets. Machine Learning (‘AI’)
  • Output: Asset failure mode analysis and prediction.

Addressable market: A wide range of fixed assets: water, energy distribution, city lighting, production plants, transport networks.

Business Case: More effective and efficient asset management, increased up-time of network and nodes identify ‘weak spots’ in network. Pro-active preventative maintenance.


AI-Driven fault detection and measuring system

  • Input: Software interfaces to existing pipeline camera/fault detection systems (example: BUCHEN)
  • Output: EN13508/2 format

Addressable market: Any applications where feeds from robo-camera are manually analyzed (waste-clean-water networks).

Business Case: 10x increase in speed of diagnosis. Fewer errors in fault detection. Lower cost of miss-rates. Lower labor costs -less human visual inspection needed.  Enhanced job quality and job satisfaction.


Consulting Services

We offer end to end strategic and technical advice all the way to project management and execution. Our clients, mostly municipalities seek support across various asset-types, including deployment and data analysis, synthesis and prognosis and recommendations.

Key features

Accurate measurement of physical waste water parameters

The WS-100 measures water level, water pressure, water flow and water temperature in high-resolution. The thickness of the silt layer can also be measured.

Measurement of other parameters (optional)

The WS-100 can be extended with additional measurement parameters, for example sensors to measure conductivity and pH for specific applications.

Local data storage

The WS-100 locally stores raw measurement data ensuring long, completely standalone unattended operation. Having access to raw measurement data is perfect for research applications and/or for developing AI based decision making processes.

Rugged & waterproof

The WS-100 is fully waterproof (> IP69) and built to last. Sensors are not affected by pollution in their operating environ- ment. Enclosures are made of tough materials that also protect the electronics well.

Easy to maintain

Sensors and system require very little to no maintenance. Power banks can be charged on location. The system keep detailed error logs to quickly find potential problems.


Standard communication via RS485/Modbus or BLE. Other standards or optical communication can be made available on request.

Application Programming Interface

The complete API is available to communicate over RS485 or wireless BLE. The API and internal data processing can be customised for specific applications.

OEM customizations

The WS-100 water measurement platform can be customised or extended for specific applications.

Data platform & analysis

Data platform with multi-dimensional analysis giving deep insights in nature, origin and pollution degree over time across a complete city.

Smart Cities sewerage sensor

Application examples

The WS-100 water sensor platform is suitable for a wide variety of (waste) water monitoring applications.
Interested? Contact us today.

Waste water monitoring in sewer pipes

The WS-100 water sensor platform is suitable for monitoring sewerage pipes.

The WS-100 water sensor platform is suitable for monitoring sewerage pipes.

Surface water monitoring

The WS-100 water sensing platform is also used for surface water monitoring.

The WS-100 water sensing platform is also used for surface water monitoring.

Culvert water monitoring

The WS-100 water sensing platform is also used for measuring in culverts.

The WS-100 water sensing platform is also used for measuring in culverts.

Technical Specifications


Physical parameters: water level, pressure, flow, water & environment temperature, silt layer thickness*

Chemical parameters: water conductivity, specific chemicals, pH (validation pending).


  • Flow, level, thickness sensing: tested pipe diameters upto 125mm
  • Flow rate measurement range: tbd
  • Temperature measurement range: 0-25°C
  • Pressure measurement range: 0-2 bar
  • Water resistance: IP69 or better
  • Mechanical sensor executions:

    • Metal insert: quick installation in concrete pipes with diameters ranging: 300-900mm (tested in the field)
    • External PVC ring: for diameters < 300mm external PVC rings are used.

Control unit

  • Dimensions (l x w x h): 300 x 240 x 95mm
  • Weight: approximately 8kg
  • Water resistance: IP69 or better
  • Local storage of raw data measurements
  • Connectivity: RS485, Modbus, wireless BLE
  • Power bank: 12VDC, 25Ah, rechargeable.

* Silt layer thickness/water level depends on diameter of sewer pipe

Ultrasonic sensing

Ultrasonic sensing uses the time of flight (TOF) of an ultrasonic wave and its dependency on the flow rate of the medium to measure and calculate volume flow, using the difference in the propagation time of the ultrasonic wave when transmitted into and against the direction of the flow. This technology is outstanding at measuring volume flow rates across a wide range and works with fluids like water and oil as well as gases like air and methane.


  • Long life time 20 years
  • No moving parts
  • Low minimum flow rate Qmin at 5 – 10 L/hr
  • Can detect small flow leakage ( ~1L/hr )
  • High accuracy
  • Re-calibration >20 years
  • No tampering issue
  • Electronic device to enable AMR

Customers and deployment

We have multiple commercial deployments across the Netherlands, notably cities of Breda and Roosendaal. We are advising the cities of Utrecht on sewage system data acquisition, storage and SCADA usage. And the city of Hertogenbosch on automation of wastewater systems.

Custom solutions

2M Engineering is specialized in the development of sensor products. 2M Engineering develops, certifies and produces standard and customized solutions for specific applications.

Together with our clients we determine the specifications, customisation requirements and subsequently build, test and validate new solutions before larger scale production.

More information

Contact 2M Engineering to learn more. Together we can explore if our water sensing technology platform is the answer to the application you have in mind.

WS100 SmartCities – Waste Water Sensor Platform Brochure (pdf)

Smart Cities Sensor Manhole

Smart Cities Innovation Project (finished)


IoT waste water sensor system

Within the living lab project ‘Smart City Water Systems’ a number of partners is working together to realize a smart sensor system for the measurement and analysis of various wastewater parameters. These partners are: 

i-SAGO, Kanters, Irekcon!, Ziut, TU Delft, SMS Metaal Service, Gemeente Roosendaal, Gemeente Breda

Rioned innovatie prijs 2019

IoT waste water sensor system

Feb 2019

As mentioned earlier, we are nominated for the Rioned Innovation Prize 2019. Rioned had selected 4 projects out of 12 entries. A great opportunity to show this project to a wider audience. In preparation for this we made a nice animation film in which we can see how we started this project, what we have already achieved together with our partners and where we eventually want to go.  We proudly showed this film after which the audience could ask questions. The result is great. The film was received enthusiastically and people were very interested in the sequel. Of course we are happy with our 3rd prize and that we could use this stage.

Via deze link je de film  bekijken.

Project Status

Pilot production. We are soon delivering a number of systems for long term stability measurements. Date: 30-06-2021

Two systems have been installed: one in the city of Breda and one in Roosendaal. The systems are operational and the first data is appearing. Date: 8-02-2019

A first proof of concept has been created that fits in the water sewerage test setup in Breda. The sensor electronics and sensorring fits in a pipe with 300mm diameter. First measurements have been planned. The sensor measures at fixed intervals and sends it to a central point using a LoRa radio module. The sensors measure water height, waterspeed and water temperature in the pipe. The sensorring is completely created using printed electronics sensorfoil. Date:07-03-2018


This project was made possible by a contribution from the European Regional Development Fund as part of OP-Zuid.