Understand the Health of a Water Network Before, During, and After a Storm Event.

Critical Data When it Counts

Tracking storm water events can be a challenge because of the inherent unpredictability of storms.  Our analytical instrumentation supports the growing trend towards automating stormwater monitoring.  Measuring flow, rain, level, or water quality can be accomplished in real time through an automated solution from YSI. This ensures events are captured as they happen, whether that is in the middle of the day or the middle of the night.

Stormwater Monitoring Basics Webinar

Identify Changes

Stormwater Monitoring Station YSI

Indicate water changes from a central location.

Our water quality instrumentation can detect sediment and contaminates washed into streams from falling rainwater.  As the water level rises WaterLOG bubblers can detect the change in level, while a SonTek flow meter detects the changes in water velocity.  Let our Integrated Systems and Services group customize a complete turnkey monitoring solution for automated stormwater monitoring.

Velocity and Flow

Sontek SL Series ThumbSonTek-SL

Designed specifically for side mounting on bridges, canal walls, or riverbanks, the SL's low profile housing makes installation easy. With three models to choose from, the SonTek SL can be used in channels small enough to jump across to rivers as wide as the Amazon.

  • SmartPulseHD® - intelligent algorithm that looks at water depth, profiling range, velocity, and turbulence, and then acoustically adapts to those conditions for the best data possible
  • Customizeable, flexible setup options to suit a variety of applications
  • Water velocity, level, flow, and total volume-multiple parameters from one easy-to-use instrument

Sontek Argonaut XR ThumbArgonaut-XR

Ideal for near shore deployments in less than 40 meters of water.  Designed specifically for mounting on the bottom of a river, channel, or harbor, the SonTek Argonaut®-XR features a special mode that automatically adjusts one of its measurement cells for changing water level. Its small size, rugged build, and flexible system architecture make the XR attractive for both real-time operation and autonomous deployments.

  • MultiCell feature - 10 water velocity cells plus an eleventh automatically adjusting cell
  • 3D water velocity
  • SDI-12, RS-232 communication protocol

Sontek IQ Series ThumbSonTek-IQ

Capable of working both in man-made as well as natural channels, the SonTek-IQ can collect flow (area-velocity) and volume data in as little as 8 cm (3 in) of water. It handles full or partially-full pipe conditions, slow, and even reversing flow with ease. Its five-beam pulsed Doppler design adapts to changing conditions and captures high-resolution data throughout the flow field. With the SonTek-IQ, expect to get quality data for quality decision making.

  • Self-calibrating water level using vertical acoustic beam and pressure
  • Proprietary flow algorithms for canals, natural streams and pipes

Data Collection

Storm 3 ThumbStorm 3 Data Logger

The WaterLOG® Storm 3 is a mid-range data logger with an ideal cost-to-performance ratio. Communicate through GOES satellite and cellular modems using a balanced set of inputs for analog, digital I/O and SDI-12 smart sensors. Easily configure and collect data using the browser-based graphical user interface with all standard web browsers on PCs, tablets and smart phones.

  • Library-based sensor setup options
  • Direct connect or wireless (Wi-Fi) connection for the GUI interface
  • GSM and CDMA compatible


Rain Gauge WaterLOG ThumbSDI-12 Rain Gauge

Capable of maintaining accuracy at increased rates of rainfall ranging from 0-25 inches (635 millimeters) per hour, the WaterLOG Tipping Bucket Rain Gauge has two removable stainless steel funnel screens and a rust-proof enclosure. It also has a magnetic reed bucket tip sensor and an internal leveling mechanism with a ‘bulls-eye’ level to ensure high accuracy data.

  • Built-in microprocessor automatically corrects errors
  • SDI-12 output


Real-Time Solutions

Stormwater Monitoring System with Instrumentation

Monitor in real-time with alerts for storms and floods.

This system is modeled off of hundreds of monitoring sites installed and maintained by YSI globally.  The most important aspects when exploring any stormwater monitoring project is proper site and sensor selection.  Select instrumentation from the categories below to help us design a stormwater monitoring system that meets the essential data delivery needs of your specific project. 

Water Quality

YSI-EXO2-3Qtr-200x200EXO2 Multiparameter Sonde

A smart, field-ready water monitoring platform that is suitable for long-term, continuous monitoring.  With wet-mateable connectors, smart, sensors, an anti-fouling wiper, and numerous onboard monitoring systems ensure successful deployments. 

  • Welded titanium sensors, housings, and double o-rings
  • Flexible sensor payload/configurations
  • Wireless communication with the ability to integrate seamlessly with marine monitoring systems

Water Level

Nile Radar Level WaterLOG Thumb 200x200Nile Radar Sensor

Designed for mounting on bridges and platforms directly over the water, the WaterLOG Nile Radar offers a non-contact water monitoring solution in a light weight, compact instrument.  Its reliable interface and simple SI-12 and RS-232 communication ensure seamless integration with current water monitoring stations.  Accurately measure water levels through continuous, non-contact transmission.  

  • Accuracy range of ± 2 millimeters
  • Advanced mapping options
  • Measurement range up to 70 M (Nile 517)

H3553T-Bubbler-WaterLOG-ThumbH-3553T Bubbler

The H-3553T is a combined constant flow Bubbler with built-in NIST traceable pressure sensor.  Directly measure dry gas with high accuracy with this complete bubbler system.  This model provides the highest purge pressure in the industry-up to 90 PSI.

  • Built-in display and purge sustain feature
  • Can deliver an automatic or manual user-defined purge
  • Extended SDI-12 commands for setting the stage to the current water elevation or pressure

Shaft Encoder WaterLOG ThumbShaft Encoder

Accurately measure water level in a stilling well.  The H-3342 Shaft Encoder measures water level by monitoring the position of a float and pulley, with a magnetic sensor to minimize static sensitivity allowing for high-accuracy data.  This series is user friendly with a built in LCD display and compatible with most data loggers.  

  • Absolute, optical encoder preserves correct position-even if the power is lost
  • SDI-12 and 4-20mA output
  • Accuracy is 0.00024 ft. (.0073152 cm) when using a 1 ft. (.3048 m) circumference pulley


HydroSphere™HydroSphere Cloud Hosted Data Solution

Data hosting through HydroSphere allows data download from any computer or mobile device with an internet connection.  Custom alarm notifications via SMS text and / or email let you know when a sample has been taken and of other alarm criteria-such as a parameter exceeding a maximum limit.  Pair with the Storm 3 data logger with optional internal, built-in cell modem for quality data collection. 

  • Automated data push from data logger allows less frequent site visits
  • Data is secure and backed up off site