Sentry logo with stylized infinity symbol in green and blue adjacent to the word "sentry" in dark blue text.

SENTRY™ is a low-maintenance, biofilm-based organic loading and toxicity sensing system. It offers robust, reliable, and real-time monitoring that supports feed-forward monitoring for wastewater.

A water filtration device from Sentry, with a cylindrical body, attached to a water pipe, featuring labels and a liquid flow arrow.

Always on,
Quality monitoring

At SENTRY™, we care about the environment and making better decisions when treating water and wastewater.

SENTRY™ is a tool to help make better, more timely decisions about treatment process performance. As part of a decisions support system, SENTRY™ provides real-time information to the facility operations staff that is not available through any other sensor system.​​ 

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U.S. Patent 11,352,272

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Computer monitor displaying a health data dashboard from Sentry, showing a line graph of signal levels over a date range, with highlighted areas indicating acceptable and problematic ranges.
Case Studies
Freshly poured concrete being smoothed and leveled at a construction site.
Industrial water treatment facility with large blue basin and yellow piping system on the side, outdoors with trees in the background.
IUIII 
Influent Monitoring
Energy Optimization


Anaerobic Digestion Optimization
Water treatment plant with circular settling tanks and green grass, surrounded by trees.
People in a small boat on a lake surrounded by trees, with a red buoy floating nearby. 
Other Wastewater Applications
Clean Water Applications
A city skyline with high-rise buildings and the CN Tower across a body of water, labeled 'Municipal' at the top.
A cover image with a title 'Anaerobic Digestion' at the top, showing three large green industrial digesters against a backdrop of blue sky with white clouds, and green grass and bushes at the foreground.
Stainless steel industrial pipes and tanks in a manufacturing or processing plant.
Water with a hand grasping another in the water, with text overlay about water treatment equipment and a logo for Dave Heiner Associates Inc.

Contact us.

973-299-9990