Session Summary:

This fundamental session discusses level control methods and explanations for common electrical control terms. There are many options in sensors, and wastewater end users benefit from selecting the best sensors for their particular plant. The differences between systems with variable frequency drives and those without are crucial in understanding best control practices.

Opportunity to Earn CEU Credits

This SWPA Webinar offers CEU Credits. To earn these credits, you must fully complete the webinar playback and enter the code given at the end of the playback into the CEU credit form. Each state has different parameters and paperwork requirements. For more information, please contact SWPA at 847-681-1868 or

This basics level course focuses on different types of sensors used in the wastewater industry. Understanding level controls—linear and proportional-integral-derivative—is vital to the success of each operation.

Attendees will learn:

  • The differences between float switches, bubbler systems, pressure transducers, ultrasonic transducers and level probes
  • Electrical control types, including the 4-20mA current loop
  • How to size transducers
  • Important information about isolated and non-isolated analog level inputs