Working on Water

Senix ToughSonic® Ultrasonic Transmitters perform water monitoring with “non-contact” technology that looks down at the water surface from above. These sensors are used in open air and in stilling tubes that constrain the sound and improve performance. They are easy to use and reliable, and thousands are installed in applications around the world for irrigation, stream monitoring, flood and tsunami warnings, sea level monitoring, and tank level monitoring

Industries & Applications

  • Irrigation
  • Flood Monitoring
  • Open Channel Flow
  • Sea Level Monitoring
  • Streams, Rivers, Ponds
  • Wastewater

Other Water Applications

Here are just some of the many other water level applications for
Senix ToughSonic sensors:

  • Water tank level
  • Waste water
  • Tidal monitoring
  • Ocean wave monitoring
  • Towing tanks

Water Delivery to Farms in Australia

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The Sensors

Whether used indoors or out, ToughSonic® sensors can take abuse. Solid state electronic components are epoxy potted into stainless steel housings, and there are no mechanical parts to break. IEC compliant electrical interfaces are protected from reversed connections and over-voltages.

These distance measurement sensors connect with all common types of automation and telemetry equipment. Applications range from simple analog connections to sophisticated multi-sensor data networks. Our sensors are cost effective because flexible connectivity is embedded in the sensor’s software – power that you can unlock with the SenixVIEW PC software included with every sensor. Push-button “teach” is also included in many models.



  • Type 316 stainless steel housings
  • Sealed epoxy potted construction
  • Ruggedized piezoelectric ultrasonic transducers
  • Liquid tight IP68 immersion rating
  • IEC compliant electrical interface protection
  • Hardened ToughSonic internal electronics
  • UV-resistant, potted-in cable
  • CE compliant



  • Connects to SCADA and other equipment
  • Several standard interfaces including analog 4-20 mA current loop, analog voltage and serial data
  • Interface distances, output ranges and response features are adjustable to suit the application
  • Duplicate installations without re-calibration
  • Operates in battery operated systems
  • Support software included for sensor installation


Historically, farm water was controlled manually.

But there’s a better way…

ToughSonic® ultrasonic sensors are used to measure the level of channels, canals and gates to control the distribution of irrigation water. The sensors connect with SCADA systems and are compatible with battery operation, and used worldwide by irrigation districts and water providers.

Murray Irrigation, Australia’s largest private environmental and irrigation water delivery company, uses the ToughSonic 14 to manage water distribution to many of their approximately 2,200 landholdings throughout southern New South Wales. Customers on their PIIOP program can order, sell and buy water from their cell phone using telemetry-enabled, automated and/or remote-controlled technology. Please see our article on this project.

Floodgate Valve

Water Delivery

Remote Monitoring

Remote Monitoring

Water Liquid Level Water Delivery to Farms in Australia


Open Channel Flow

Open Channel Flow measurement determines the volume of water, effluent or industrial waste flowing through a channel, flume or weir. Flumes and weirs are hydraulic structures within which the liquid flow rate is determined by measuring the height of the liquid flowing through the structure. That height is converted to flow using an equation specific to the structure. Positioned at the required location, ToughSonic sensors measure the liquid height by non-contact distance measurement looking down at the liquid surface.
  • An example Parshall flume drawing is shown at the right.
  • Typical weirs are shown below.
  • The flow rate through the weir can be controlled by adjusting the vertical position of a gate.

Parshall Flume Sketch

Water Wastewater ToughSonic CHEM 35 Level Sensor

Flumes, Weirs & Channels


Flood Monitoring

Senix ToughSonic® sensors measure the level of water flowing in streams and rivers. Sensors mounted on bridges and other structures look down at the water to report flood status via telemetry. The Iowa Flood Center (IFC) was formed in 2009 to engage in flood-related projects to help Iowans understand their flood risks and make better decisions. In 2010 they chose ToughSonic sensors for their new Iowa Flood Information System (IFIS) and over several years that system has added over 200 monitoring sites using ToughSonic 50 sensors. Please see our article on the IFIS system for additional information.

Also, check out Senix sensors selected for the Philippines Flood Warning Systems


Pacific Junction, Iowa, March 2019

Bridge Mounted Sensor

Rivers & Streams

Sensix ToughSonic 50 Level Sensor with rear mounting threads

lowa Flood Center Stream Guage

lowa Flood Map with current rainfall conditions superimposed. Blue dots are monitoring sites that use the ToughSonic 50 Level Sensor

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