About Us

Our History

The roots of Hydrodynamics go back 10+ years to a major water leak that occurred in the home of Hydrodynamics co-founder and renowned architect, Roger Brasel. Roger was frustrated by the $165,000 bill that he was faced with and felt that with the current state of technology we should be able to avoid such disasters. Enter Bill Underhill with his extensive business background and Stephen Samuels, PE Mechanical Engineer, and Hydrodynamics was born.

Hydrodynamics has leveraged the innovative spirit of Silicon Valley and built a team of engineers and technologists focused on developing products that help people manage the water usage in their homes and businesses. The Flow Sentinel is the first of these products which provides home owners with the ability to detect leaks, intelligently track water usage, and remotely shut off the water supplies to prevent costly disasters.

As we enter a time when smart homes are becoming more and more ubiquitous, why should our doorbells be smarter than our water?

The Team

Dr. William R. Underhill, JD, MBA, EdD

Co- Founder and CEO of Hydrodynamics Technologies

Bill Underhill

Founder / CEO

Patrick Manning

A dynamic executive with cross-functional experience in areas of business development, technical sales, project, and global supply chain management.

Patrick Manning


Ted Lanes

Receivership, forensics, restructuring and turnaround professional with a significant track record of accomplishments in a variety of industries.

Ted Lanes


Stephen M. Samuel, ME PE

CEO and founder, Mechanical Engineering from the University of Massachusetts and a certification in Professional Engineering from the state of California.

Stephen M. Samuel

Founder / Mechanical Lead

Roger Brasel


Roger Brasel

Founder / Architect

Alex Barangan

Degree NameMaster of Science (MS) Field Of StudyComputer Engineering

from University of California, Santa Cruz

Alex Barangan


Ethan Underhill

BS Software Engineering at Ira A. Fulton Schools of Engineering at Arizona State University.
MBA Business Administration and Management, General from New York University – Leonard N. Stern School of Business

Ethan Underhill

Program Manager

It’s Time to Protect Your Family