Now Let’s Look at Distribution Sensors & Smart Networks

Data Gathering, Analysis, Actions:

  • Hydrophones
  • Pressure Sensors
  • DMA Flow meters

AIA Portfolio

Keeping an intelligent eye on your assets

Visenti solutions combine a variety of data sources to provide actionable information to operators to reduce leaks, locate bursts, and manage assets better.

Visenti was born organically as an MIT spin-off.

Distributed Sensors & Smart Networks

Leak detection, localization, and notification


Detect slow growing leaks

Pressure Sensors

Detect and localize bursts


Provides NRW calculations




Detects existing leaks where there is more noise spatially

Detects growing leaks where noise increases temporally


Pressure Sensor

Detects and localizes potential bursts utilizing transient signatures



Identifies problem areas by performing a water balance

Provides NRW calculations

Effective in all Network Configurations.
Complex Open Networks, Trunk Mains, Isolated District Metered Areas.

  • Effective on pipe diameters above 100mm (4 in)
  • Burst size 1L/s (15 gpm) and above.
  • Leak size 5L/m (1.5 gpm) and above.
  • All materials – Asbestos Cement, Any metal pipes such as Cast Iron, Ductile Iron, Steel etc., Plastic pipes such as PE, HDPE and PVC (with higher density sensor layout)
  • Real-time (24/7). Not only during night time
  • Leak localization accuracy – 20 to 100m (then the utility needs to survey the suspected pipe to pinpoint the leak
  • Alerts are sent in real-time to the customers by Visenti’s control room – typical advanced notice is 6-8Hrs advanced notice prior to any other form of detection

LeakView Interface

LeakView – Burst example

LeakView – Example of slow growing leak

The system has detected increased acoustic noise within a range of 500m from the sensor location due to a slow developing leak. After the pipe has been repaired the acoustic energy has been significantly reduced until a new leak has been detected due to acoustic energy increase. When the second leak has been repaired the acoustic energy has been significantly reduced again meaning that there are no other leaks after the pipe repair.

Another Example

LeakView – Existing leak example

Pressure Transient Monitoring & Pipeline Risk Assessment

Pipe failure mitigation:

SurgeView correlates transients with operational and meter data to identify cause.

Pipe risk and stress level monitoring:

Pairing with pipe age and material, SurgeView identifies the areas most at risk to failure.

  • Same high-rate pressure sensors as LeakView
  • Sampling range: 64 Hz – 256 Hz
  • 4 km detection range

Instrumentation enables the solutions.

Hardware deployments are flexible.

Hydrant deployment

  • Temporary
  • Flexible
  • 10 minutes to install

Vault deployment

  • Permanent
  • Weather independent
  • Better data
  • Solar panel to increase battery life

Visenti Benefits

  • See and hear new & existing leaks before they become bursts
  • Respond to bursts before they cause catastrophic damage
  • Identify the small fraction of pipes that really need repair through in-line and fixed monitoring – save $’s
  • Use intelligence to identify and predict problems in your network before they happen
  • Help to identify real water losses

Let’s Look at the Big Picture / Your System

Environmental Benefits

Reduced Leakage:

  • Less hydro use for pumping & treating water

Global Greenhouse Gas Emissions

Global Carbon Hits Record Highs – Off The Chart
(New Civil Engineer, Feb 2018)

UN COP21 Climate Change Conference in Paris, Dec 2015

  • This century – global temperature rise below 2%
  • 195 Countries signed agreement

Not Good News

  • 2017 and 2016 2nd and 3rd hottest years on record
  • Global emissions rose in 2017, after 3 years stable

Money Driven Action

  • Companies investing trillions of dollars “tell us about your climate risks”
  • Investment diverted away, if not positive contribution to Paris Agreement

Municipal Hydro Use In Ontario – Water / Wastewater

Largest hydro use – pumping and treating water / wastewater

Typically water uses 80% and wastewater 20%

Finding and fixing leakage reduces CO2 emissions

Although Canada / Ontario relatively “clean” hydro, and not predominately coal fired generation, still scope to reduce

  • Water only – kWh to pump and treat 1 m3 = 0.580 kWh
  • kg of CO2 per kWh = 0.120 kg
  • kg of CO2 to produce 1 m3 of water = 0.70 kg of CO2

Environmental Costs – Greenhouse Gas Emissions

Let’s Move Onto Apparent Losses

Customer Meter Testing

Customer Meter Under-Registration:

  • Data Base Analysis
  • Statistically Valid Number of Meters Tested

Customer Meter Revenue Loss How Much – One Approach “A”

  • Most current customer meters are mechanical
  • Latest technology is not mechanical – more accurate over time
  • Older mechanical meters, as a group, under-register
  • Key to analyse meters by size, age and type
  • Need independent testing of sample of meters – statistically valid
  • With results, know percentage of under-registration, and revenue loss
  • Can then design a meter changeout program, and include AMR/AMI (reading, billing and analysis component)

Approach “A”
Estimate of Under-Registration

Customer Data Base Analysis

  • Analyse meters by age, size, type and metered volume


  • Divide meters into 5 year increments, and estimate under-registration

Meter Testing

  • Design meter testing program
  • Test meters in age bands, across whole system – randomly selected
  • Statistically valid number of meters